EP2927348A1 - Corrosion inhibitor composition and method for preventing corrosion of metal borders of a saw in contact with wood to be cut - Google Patents

Corrosion inhibitor composition and method for preventing corrosion of metal borders of a saw in contact with wood to be cut Download PDF

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Publication number
EP2927348A1
EP2927348A1 EP15450016.9A EP15450016A EP2927348A1 EP 2927348 A1 EP2927348 A1 EP 2927348A1 EP 15450016 A EP15450016 A EP 15450016A EP 2927348 A1 EP2927348 A1 EP 2927348A1
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Prior art keywords
coolant
base
wood
saw blades
composition
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EP15450016.9A
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German (de)
French (fr)
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EP2927348B1 (en
Inventor
Christoph Pollak
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Researchtub GmbH
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Researchtub GmbH
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/06—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in markedly alkaline liquids
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F15/00—Other methods of preventing corrosion or incrustation
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
    • C10M125/10—Metal oxides, hydroxides, carbonates or bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/26—Carboxylic acids; Salts thereof
    • C10M129/28—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M129/30—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 7 or less carbon atoms
    • C10M129/34—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 7 or less carbon atoms polycarboxylic
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M133/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M133/12—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to a carbon atom of a six-membered aromatic ring
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/38—Heterocyclic nitrogen compounds
    • C10M133/40—Six-membered ring containing nitrogen and carbon only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/38—Heterocyclic nitrogen compounds
    • C10M133/44—Five-membered ring containing nitrogen and carbon only
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
    • C23F11/18—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using inorganic inhibitors
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/02—Hydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/02—Hydroxy compounds
    • C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
    • C10M2207/044—Cyclic ethers having four or more ring atoms, e.g. furans, dioxolanes
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
    • C10M2207/123—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms polycarboxylic
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/064—Di- and triaryl amines
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/22—Heterocyclic nitrogen compounds
    • C10M2215/221—Six-membered rings containing nitrogen and carbon only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/22—Heterocyclic nitrogen compounds
    • C10M2215/223—Five-membered rings containing nitrogen and carbon only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/22—Metal working with essential removal of material, e.g. cutting, grinding or drilling

Definitions

  • the present invention relates to a corrosion protection composition for metallic woodworking machine elements, in particular a saw, such as band saw blades, circular saw blades or gang saw blades containing at least one liquid carrier and at least one emulsified or dispersed base dissolved in the carrier and optionally further constituents selected from a solubilizer for the base in the carrier, an emulsifier and / or a stabilizer, and a method for preventing corrosion of metallic elements in contact with wood to be shredded, a woodworking machine, in particular a saw Band saw blades, circular saw blades or gang saw blades, in which the elements are cooled during their contact with wood to be comminuted with a selected from lubricating oils coolant.
  • Wood especially oak, contains not insignificant constituents of tannic acids, in particular tannins, such as gallic acid or ellagic acid, and a variety of other acidic organic compounds, such as various derivatives of hydroxycinnamic acid, such as sinapinic acid, syringic acid, p-hydroxybenzoic acid, which on contact with non-acid resistant steels commonly used in woodworking machines such as band saw blades or gang saw saw blades or end milling heads, lead to corrosion, greatly reducing the life of the elements in contact with the wood.
  • tannins such as gallic acid or ellagic acid
  • other acidic organic compounds such as various derivatives of hydroxycinnamic acid, such as sinapinic acid, syringic acid, p-hydroxybenzoic acid
  • the acidic components of the wood are at least partially soluble in water or oil, which are commonly used as coolants and / or lubricants of elements in contact with wood, which also corrosive constituents in other areas be entered the woodworking machine or be discharged directly into the environment, especially when the woodworking machine has no separate coolant circuit, but a water cooling takes place, in which the cooling water is discharged directly as waste water into the environment, or depending on chartering with pollutants also needs to be disposed of.
  • the present invention thus aims to provide a corrosion protection composition for metallic woodworking machine elements in contact with wood to be shredded, which composition can be simply and reliably metered and, in addition to the safe neutralization of the acid, does not pollute or enhance the environment the production cost of the product leads.
  • the anticorrosive composition according to the invention is essentially characterized in that the liquid carrier selected from the group of lubricating oils contains at least one base selected from the group consisting of Na (HCO 3 ), 2 Na (HCO 3 ) / Na 2 (CO 3 ), Ca (C 2 H 3 O 2 ) 2 , pyrrolidine, piperazine, 1-methyl-pyrrolidine, benzylamines, dibenzylamine, dioctylamine, diethyleneamine, basic amino acids, such as lysine, arginine, histidine or proline, and their basic salts and carboxylic esters, and that a pH of the composition is adjusted to values above 7, especially 9 ⁇ 0.5 is.
  • the liquid carrier selected from the group of lubricating oils contains at least one base selected from the group consisting of Na (HCO 3 ), 2 Na (HCO 3 ) / Na 2 (CO 3 ), Ca (C 2 H 3 O 2 ) 2 , pyrrolidine, piperazine, 1-methyl-pyr
  • the liquid carrier selected from the group of lubricating oils contains at least one base selected from the group Na (HCO 3 ), 2Na (HCO 3 ) / Na 2 CO 3 , Ca (C 2 H 3 O 2 ) 2 , pyrrolidine, Piperazine, 1-methylpyrrolidine, benzylamines, dibenzylamine, dioctylamine, diethyleneamine, basic amino acids such as lysine, arginine, histidine or proline, and their basic salts and carboxylic acid esters, and the pH of the composition is adjusted to values of about 9
  • the anticorrosive composition is formed so that an amount of 10 ppm to 8000 ppm, in particular 500 ppm to 5000 ppm of bases in the total composition is included, on the one hand ensures that an environmental impact also at the same time the pH is kept in the low basic range in order to fear again a surface corrosion of the articles treated therewith, nor to achieve an excessive increase in the pH. Even when using more than one base, the total amount of bases is not exceeded.
  • the invention is further developed such that an alcohol, in particular selected from C 6 to C 10 alcohols, such as octanol as a solubilizer in the corrosion protection composition is included.
  • an alcohol in particular selected from C 6 to C 10 alcohols, such as octanol as a solubilizer in the corrosion protection composition is included.
  • the addition of decanol in an amount between 0.07% by weight and 0.8% by weight, in particular from 0.1% by weight to 0.5% by weight, of the composition is particularly preferred.
  • solubilizer it is possible to neutralize and precipitate acidic constituents directly at the cut surface, so that the recirculated lubricating oil usually has a pH between about neutral and about 9 and thus damage to machine parts can be stopped with certainty ,
  • the anticorrosive composition is in this case designed so that for use in a closed system it is composed of lubricating oil, at least one organic base and an alcohol and optionally a further water-soluble base and an emulsifier, in which case precipitated salts the acids contained in the woods are removed in practice via a filter from the circulated oil.
  • at least one inorganic base in particular a combination of sodium bicarbonate and calcium acetate is used.
  • inorganic bases are usually not soluble in lubricating oil and are only partially soluble in the alcohol used as a solubilizer, the solution of the inorganic bases is achieved in that the water present on the surface or in the interior of the wood acts as a solvent.
  • a mixture of different bases can be used, wherein the amount of inorganic base depends on the amount of water introduced or existing or can be slowly increased over time, as the water content in the system increases.
  • the anticorrosion composition By adding, as is the case to a development of the invention, to the anticorrosion composition an emulsifier from the group of polyalcohols, ionic or nonionic surfactants and polyethylene glycol derivatives, in particular polysorbates, it is possible to use a water-in-oil emulsion as cooling agent, especially in the closed system. or lubricant in the circuit, in which emulsion any inorganic and organic bases can be dissolved or dispersed, whereby a particularly accurate and easy adjustment of the desired pH of the corrosion protection composition to values of more than 7, in particular 9 ⁇ 0.5 can be achieved.
  • the water-in-oil emulsion is produced directly in the system from the water present on the surface or the inside of the woods as well as the lubricating oil used as carrier.
  • Such a corrosion protection composition may in this case be a water-in-oil emulsion which, for example, has a sodium hydrogencarbonate / sodium carbonate buffer dissolved or dispersed in an aqueous phase of the emulsion and has dissolved diethyleneamine in an oil phase representing a major constituent.
  • a corrosion protection composition may in this case be a water-in-oil emulsion which, for example, has a sodium hydrogencarbonate / sodium carbonate buffer dissolved or dispersed in an aqueous phase of the emulsion and has dissolved diethyleneamine in an oil phase representing a major constituent.
  • the bases in a stoichiometric excess with respect to the acids contained in the wood to be processed, the excess usually being in the range from 2: 1 to 10: 1, in particular 3 : 1 to 6: 1 is selected.
  • Such an excess guide of the base has proved to be particularly favorable because the amounts of acidic components of the wood depending on the type of wood to be processed, in particular to be cut wood, vary greatly from the origin of the wood and other factors, so that for a reliable neutralization of the acidic constituents and thus an efficient corrosion protection on the parts of a woodworking machine which come into contact with the acidic constituents of the wood, as the saw bands have proven an excess of base to be advantageous.
  • the excess is not chosen so large that the basic solution itself would corrosively affect the metal elements of the woodworking machine in contact with the wood or the base.
  • the invention also aims to provide a method for preventing the corrosion of metallic elements in contact with comminuting wood of a woodworking machine such as saw gates, saw bands, planers or milling cutters, in which not only the corrosion of these elements reliably and reliably prevents is, but which method is also simple and reliable executable and also increases the life of the device using such a method.
  • the inventive method is essentially characterized in that the coolant at least one solution, alcoholic solution or dispersion of at least one base selected from the group Na (HCO 3 ), 2 Na (HCO 3 ) / Na 2 CO 3 , Ca (C 2 H 3 O 2 ) 2 , pyrrolidine, piperazine, 1-methylpyrrolidine, benzylamines, dibenzylamine, dioctylamine, diethyleneamine, basic amino acids, such as lysine, arginine, histidine or proline, and their basic salts and carboxylic esters, and optionally one Emulsifier is metered and mixed with the coolant and that a pH of the coolant before its application to the elements to values of more than 7, in particular 9 ⁇ 0.5 is set.
  • the coolant at least one solution, alcoholic solution or dispersion of at least one base selected from the group Na (HCO 3 ), 2 Na (HCO 3 ) / Na 2 CO 3 , Ca (C 2 H 3 O 2 ) 2
  • the method succeeds in this way lead that as few parts of the woodworking machine with potentially corrosive substances come into contact and in particular the basic pH is chosen so low that corrosion by the base on the woodworking machine itself can not take place, but at the same time it ensures that the wood contained acids are reliably and reliably neutralized by the dosed bases and the water present in or on the surface of the wood.
  • this is characterized in that the coolant is recycled, that the pH is measured at least before and after the element and that the amount of base to be assigned on the basis of the pH measured after the element is determined.
  • the coolant is recycled, that the pH is measured at least before and after the element and that the amount of base to be assigned on the basis of the pH measured after the element is determined.
  • the at least one base is added to the coolant as a concentrated alcoholic solution, it is possible not to increase the volume of the coolant excessively.
  • the coolant mixed with at least one base to the element for example a saw blade, saw blade or an end mill, via spray nozzles
  • an application of the coolant takes place in the exact place intended, namely ensures the respective element and in particular an efficient cooling and at the same time an exact use of the base, ie of the neutralizing agent is ensured at the place of occurrence of the acids.
  • the method is carried out in such a way that the coolant in the Circulation is performed, and that fresh mixed with at least one base added coolant before the element, and that continuously a portion of the coolant is removed after the element from the circulation.
  • the method is preferably performed so that the recirculated coolant is passed through a filter.
  • the inventive method is further developed such that after the element a sensor for determining a water content in the system is arranged and that Composition of in the freshly metered coolant containing mixture of bases depending on the measured water content is adjusted.
  • a sensor for determining a water content in the system is arranged and that Composition of in the freshly metered coolant containing mixture of bases depending on the measured water content is adjusted.
  • coolant is used for pure coolants, such as oil cooling of a saw blade or belt, as well as for lubricants which, in addition to its lubricating effect, also have a cooling effect on the element in contact with the wood Make woodworking machine, such as a lubricating oil.
  • a contacting "element" of a woodworking machine here means any parts of such machines, such as band saw blades, circular saw blades or gang saw blades, planing, end milling, or band milling understood.
  • Fig. 1 1 schematically denotes a saw, in which according to the arrow 2 wood is fed and discharged at the arrow 3 clippings.
  • the saw is applied with a Base offset coolant via line 4 and again discharged at the discharge of the saw at line 5.
  • a pH sensor 6 or 7 is interposed in each case, with which the pH value of the offset with base coolant, which serves as a corrosion protection composition, is determined.
  • the pH value in the case of the pH sensor 6 is chosen so that it does not exceed 9, and the pH value in the case of the pH sensor 7 should not fall below the pH of 7.
  • Such a circulation makes it possible to keep the amounts of anti-corrosion composition to be added as low as possible and at the same time to ensure that in the area of the saw, the pH is always sufficiently high to neutralize the acids contained in the wood directly on site and subsequently to discharge as much as possible without consuming excessive amounts of anticorrosive composition or without having to replace excessive amounts of oil in the recirculation process each time.
  • Fig. 2 The device shown essentially corresponds to that of Fig. 1 and the reference numerals of Fig. 1 are maintained as much as possible.
  • the only differences in the device according to Fig. 2 lie in the fact that in the return line 9 in addition a filter 14 is interposed to filter off precipitated salts of the organic acid with the added base from the coolant or lubricant circuit and thus to lead as little as possible contaminated coolant in the circuit.
  • Another difference of the device Fig. 2 to that of Fig. 1 is that with valve 10 simultaneously required amounts of coolant and are added to bases via line 12, which variant of the device is always advantageous if, for example, a water-in-oil Emulsion is formed as a corrosion inhibitor with the water derived from the wood and is used.
  • Fig. 3 in which again the reference numerals of Fig. 1 and Fig. 2 are maintained, the introduction of the basic solution in the saw is designed differently.
  • Fig. 3 15 is a clean tank in which essentially pure lubricating oil is contained. Pure liquid or recirculated liquid is subsequently introduced into a mixer 16 where it is mixed with concentrate from a storage tank 17 until the desired concentration of base in the coolant is reached which can be determined, for example, by means of a refractometer or a seal measurement, since the pH, in particular when a buffer is formed, will scarcely change as a result of the change in concentration.
  • the pH measurement in turn be made in the supply line 4 in the saw 1 or directly in the mixer 16.
  • a conventional venturi or proportional mixer can be used. It is needless to say that the variant according to Fig. 3 may be provided with a filter for separating optionally precipitated salts.
  • Examples 1 to 3 were exemplified by means of a saw, wherein the circulation and metering of bases no changes must be made when the system is used for example on a router, a planer or a special saw, such as a band saw or gang saw ,

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Abstract

Eine Korrosionsschutzzusammensetzung für metallische, in Kontakt mit zu zerkleinerndem Holz befindliche Elemente einer Säge, insbesondere Bandsägeblätter, Kreissägeblätter oder Gattersägeblätter, enthält wenigstens einen flüssigen Träger sowie wenigstens eine in dem Träger gelöste, emulgierte oder dispergierte Base, sowie gegebenenfalls einen Lösungsvermittler für die Base in dem Träger und/oder Emulgator, wobei dem aus der Gruppe der Schmieröle gewählten flüssigen Träger wenigstens eine Base gewählt aus der Gruppe Na(HCO 3 ), 2 Na(HCO 3 )/Na 2 (CO 3 ), Ca(C 2 H 3 O 2 ) 2 , Pyrrolidin, Piperazin, 1-Methyl-pyrrolidin, Benzylamine, Dibenzylamin, Dioctylamin, Diethylenamin, basischen Aminosäuren, wie Lysin, Arginin, Histidin oder Prolin sowie deren basische Salze und Carbonsäureester, zugesetzt, und ein pH-Wert der Zusammensetzung auf Werte von über 7, insbesondere 9 ± 0,5 eingestellt ist, sowie Verfahren hierfür.A corrosion protection composition for metallic elements of a saw, in particular band saw blades, circular saw blades or gang saw blades, contains at least one liquid carrier and at least one emulsified or dispersed base dissolved in the carrier, and optionally a solubilizer for the base in the Carrier and / or emulsifier, wherein the selected from the group of lubricating oils liquid carrier at least one base selected from the group Na (HCO 3), 2 Na (HCO 3) / Na 2 (CO 3), Ca (C 2 H 3 O 2) 2, pyrrolidine, piperazine, 1-methylpyrrolidine, benzylamines, dibenzylamine, dioctylamine, diethyleneamine, basic amino acids such as lysine, arginine, histidine or proline and their basic salts and carboxylic esters, and a pH of the composition Values of over 7, in particular 9 ± 0.5 is set, and method therefor.

Description

Die vorliegende Erfindung bezieht sich auf eine Korrosionsschutzzusammensetzung für metallische, in Kontakt mit zu zerkleinerndem Holz befindliche Elemente einer Holzbearbeitungsmaschine, insbesondere einer Säge, wie Bandsägeblätter, Kreissägeblätter oder Gattersägeblätter, enthaltend wenigstens einen flüssigen Träger sowie wenigstens eine in dem Träger gelöste, emulgierte oder dispergierte Base, sowie gegebenenfalls weitere Bestandteile gewählt aus einem Lösungsvermittler für die Base in dem Träger, einem Emulgator und/oder einem Stabilisator, sowie ein Verfahren zum Verhindern der Korrosion von metallischen, sich in Kontakt mit zu zerkleinerndem Holz befindlichen Elementen einer Holzbearbeitungsmaschine, insbesondere einer Säge wie Bandsägeblätter, Kreissägeblätter oder Gattersägeblätter, bei welchen die Elemente während ihres Kontakts mit zu zerkleinerndem Holz mit einem aus Schmierölen gewählten Kühlmittel gekühlt werden.The present invention relates to a corrosion protection composition for metallic woodworking machine elements, in particular a saw, such as band saw blades, circular saw blades or gang saw blades containing at least one liquid carrier and at least one emulsified or dispersed base dissolved in the carrier and optionally further constituents selected from a solubilizer for the base in the carrier, an emulsifier and / or a stabilizer, and a method for preventing corrosion of metallic elements in contact with wood to be shredded, a woodworking machine, in particular a saw Band saw blades, circular saw blades or gang saw blades, in which the elements are cooled during their contact with wood to be comminuted with a selected from lubricating oils coolant.

Holz, insbesondere Eichenholz enthält nicht unwesentliche Bestandteile an Gerbsäuren, insbesondere Tannine, wie Gallussäure oder Ellagsäure sowie eine Vielzahl von weiteren sauren organischen Verbindungen, wie beispielsweise verschiedene Derivate der Hydroxyzimtsäure, wie Sinapinsäure, Syringasäure, p-Hydroxybenzoesäure, welche bei Kontakt mit nicht säurebeständigen Stählen, wie sie üblicherweise bei Holzbearbeitungsmaschinen wie Sägeblättern von Bandsägen oder Gattersägen oder auch Fräsköpfen von Schaftfräsern eingesetzt werden, zu Korrosion führen, wodurch die Lebensdauer der mit dem Holz in Kontakt befindlichen Elemente stark herabgesetzt wird. Diese Effekte werden insbesondere noch dadurch verstärkt, dass während des sich in Kontakt Befindens von beispielsweise einem Sägeblatt mit dem Holz an der Kontaktfläche durch Reibung hohe Temperaturen bewirkt werden und da Holz eine gewisse Menge an Wasser enthält bzw. auf seiner Oberfläche aufweist und somit korrosive Bestandteile des Holzes in Kombination mit der hohen Temperatur und dem immer gegenwärtigen Wasser an der Grenzfläche Holz-Stahl den Letzteren noch bedeutend schneller korrodieren als dies die sauren Holzbestandteile allein tun würden. Schließlich bewirken die durch die Reibung des Stahls an dem Holz bewirkten hohen Temperaturen auch, dass sich einzelne der obengenannten Verbindungen, insbesondere niedermolekulare Verbindungen durch die an der Grenzfläche vorherrschenden hohen Temperaturen erst bilden und somit zu einer weiteren Beeinträchtigung des Holzbearbeitungswerkzeugs beitragen. Gegenwärtig werden derartige korrosive Effekte von Holz auf den mit Holz in Kontakt gelangenden Elementen als natürlicher Verschleiß zur Kenntnis genommen und die Elemente, wie z.B. Sägeblätter häufig entweder nachgeschliffen oder getauscht, je nach Stärke der Korrosion an der Oberfläche. Ein derartiger Tausch von mit Holz in Kontakt gelangenden Elementen erfordert nicht nur einen materiellen Einsatz, sondern erzwingt hierbei jedes Mal das Abstellen der im industriellen Maßstab üblicherweise kontinuierlich laufenden Geräte und somit wird durch die Verringerung der Standzeit des Geräts der Durchsatz desselben stark herabgesetzt, was zu einer nicht unwesentlichen Erhöhung der Gestehungskosten des fertigen Produkts, nämlich des geschnittenen Holzes führt.Wood, especially oak, contains not insignificant constituents of tannic acids, in particular tannins, such as gallic acid or ellagic acid, and a variety of other acidic organic compounds, such as various derivatives of hydroxycinnamic acid, such as sinapinic acid, syringic acid, p-hydroxybenzoic acid, which on contact with non-acid resistant steels commonly used in woodworking machines such as band saw blades or gang saw saw blades or end milling heads, lead to corrosion, greatly reducing the life of the elements in contact with the wood. In particular, these effects are exacerbated by the fact that high temperatures are caused by friction during contact of, for example, a saw blade with the wood at the contact surface and since wood contains or has on its surface a certain amount of water and thus corrosive constituents of the wood, in combination with the high temperature and the ever-present water at the wood-steel interface, corrodes the latter much faster than the sour wood components alone would. Finally, the high temperatures caused by the friction of the steel on the wood also cause individual of the abovementioned compounds, in particular low molecular weight compounds, to form only through the high temperatures prevailing at the boundary surface and thus contribute to a further impairment of the woodworking tool. Currently, such corrosive effects of wood on the wood-contacting elements are more natural Wear noted and the elements, such as saw blades often either reground or exchanged, depending on the degree of corrosion on the surface. Such replacement of wood-contacting elements not only requires material use, but in doing so forces shut-off of the equipment usually running on an industrial scale every time, and thus, by reducing the life of the apparatus, the throughput of the same is greatly reduced a not insignificant increase in the cost price of the finished product, namely the cut wood leads.

Weiterhin hat es sich als nachteilig erwiesen, dass die sauren Bestandteile des Holzes wenigstens teilweise in Wasser oder Öl, welche üblicherweise als Kühl- und/oder Schmiermittel der mit Holz in Kontakt gelangenden Elemente herangezogen werden, löslich sind, wodurch korrosive Bestandteile auch in andere Bereiche der Holzbearbeitungsmaschine eingetragen werden bzw. auch unmittelbar in die Umwelt ausgetragen werden, insbesondere dann, wenn die Holzbearbeitungsmaschine keinen gesonderten Kühlmittelkreislauf aufweist, sondern eine Wasserkühlung erfolgt, bei welcher das Kühlwasser unmittelbar als Abwasser in die Umwelt ausgetragen wird, oder aber je nach Befrachtung mit Schadstoffen auch entsorgt werden muss. Durch die Säurekonzentration kommt es hierbei entweder zu einer Übersäuerung des Bodens oder aber zu einer derartig starken Verunreinigung eines gegebenenfalls im Kreislauf geführten Kühl- oder Schmiermittels, das neben dem Sägeblatt auch der Kühlmittelkreislauf häufig durchgespült werden muss und/oder ein Ersatz der gesamten Kühlflüssigkeit erforderlich ist.Furthermore, it has been found to be disadvantageous that the acidic components of the wood are at least partially soluble in water or oil, which are commonly used as coolants and / or lubricants of elements in contact with wood, which also corrosive constituents in other areas be entered the woodworking machine or be discharged directly into the environment, especially when the woodworking machine has no separate coolant circuit, but a water cooling takes place, in which the cooling water is discharged directly as waste water into the environment, or depending on chartering with pollutants also needs to be disposed of. Due to the acid concentration, this leads either to acidification of the soil or else to such severe contamination of a coolant or lubricant optionally circulated, which frequently requires flushing of the coolant circuit in addition to the saw blade and / or a replacement of the entire cooling liquid is required ,

Die vorliegende Erfindung zielt somit darauf ab, eine Korrosionsschutzzusammensetzung für metallische, in Kontakt mit zu zerkleinerndem Holz befindliche Elemente einer Holzbearbeitungsmaschine zur Verfügung zu stellen, welche Zusammensetzung einfach und zuverlässig dosiert werden kann und neben der sicheren Neutralisation der Säure weder zu einer Umweltbelastung noch zur Erhöhung der Gestehungskosten der Produkts führt.The present invention thus aims to provide a corrosion protection composition for metallic woodworking machine elements in contact with wood to be shredded, which composition can be simply and reliably metered and, in addition to the safe neutralization of the acid, does not pollute or enhance the environment the production cost of the product leads.

Zur Lösung dieser Aufgabe ist die erfindungsgemäße Korrosionsschutzzusammensetzung im Wesentlichen dadurch gekennzeichnet, dass dem aus der Gruppe der Schmieröle gewählten flüssigen Träger wenigstens eine Base gewählt aus der Gruppe Na(HCO3), 2 Na(HCO3)/Na2(CO3), Ca(C2H3O2)2, Pyrrolidin, Piperazin, 1-Methyl-pyrrolidin, Benzylamine, Dibenzylamin, Dioctylamin, Diethylenamin, basischen Aminosäuren, wie Lysin, Arginin, Histidin oder Prolin sowie deren basische Salze und Carbonsäureester, zugesetzt ist, und dass ein pH-Wert der Zusammensetzung auf Werte von über 7, insesondere 9 ± 0,5 eingestellt ist. Dadurch, dass dem aus der Gruppe der Schmieröle gewählten flüssigen Träger wenigstens eine Base gewählt aus der Gruppe Na(HCO3), 2 Na(HCO3)/Na2CO3, Ca(C2H3O2)2, Pyrrolidin, Piperazin, 1-Methyl-pyrrolidin, Benzylamine, Dibenzylamin, Dioctylamin, Diethylenamin, basischen Aminosäuren, wie Lysin, Arginin, Histidin oder Prolin sowie deren basische Salze und Carbonsäureester zugesetzt ist, und der pH-Wert der Zusammensetzung auf Werte von etwa 9 eingestellt ist, gelingt es einerseits, eine neutralisierende Umgebung für die in dem Holz enthaltenen sauren Bestandteile zur Verfügung zu stellen, und andererseits den pH-Wert in dem Schmier- bzw. Kühlmittel nicht so weit anzuheben, dass das Schmier- bzw. Kühlmittel für sich selbst gesehen, aufgrund seines hohen pH-Werts korrosiv wäre. Mit einer derartig eingestellten Korrosionsschutzzusammensetzung kann somit eine effiziente Kühlung des Elements während der Arbeit erzielt werden und gleichzeitig gelingt es, unmittelbar an der Schnittfläche des Holzes saure Bestandteile, welche aus dem Holz herausgelöst werden bzw. heraustreten und in dem Kühl- bzw. Schmiermittel dispergiert oder emulgiert oder gelöst werden, zu neutralisieren sowie gegebenenfalls auszufällen, wodurch für die Umwelt schädliche saure Bestandteile neutralisiert werden und unschädlich gemacht sind.To achieve this object, the anticorrosive composition according to the invention is essentially characterized in that the liquid carrier selected from the group of lubricating oils contains at least one base selected from the group consisting of Na (HCO 3 ), 2 Na (HCO 3 ) / Na 2 (CO 3 ), Ca (C 2 H 3 O 2 ) 2 , pyrrolidine, piperazine, 1-methyl-pyrrolidine, benzylamines, dibenzylamine, dioctylamine, diethyleneamine, basic amino acids, such as lysine, arginine, histidine or proline, and their basic salts and carboxylic esters, and that a pH of the composition is adjusted to values above 7, especially 9 ± 0.5 is. By virtue of the fact that the liquid carrier selected from the group of lubricating oils contains at least one base selected from the group Na (HCO 3 ), 2Na (HCO 3 ) / Na 2 CO 3 , Ca (C 2 H 3 O 2 ) 2 , pyrrolidine, Piperazine, 1-methylpyrrolidine, benzylamines, dibenzylamine, dioctylamine, diethyleneamine, basic amino acids such as lysine, arginine, histidine or proline, and their basic salts and carboxylic acid esters, and the pH of the composition is adjusted to values of about 9 On the one hand, it is possible to provide a neutralizing environment for the acid constituents contained in the wood and, on the other hand, not to raise the pH in the lubricating or cooling agent so far that the lubricating or cooling agent is self-evident , would be corrosive due to its high pH. With such a set anticorrosive composition can thus be achieved an efficient cooling of the element during the work and at the same time succeeds directly on the cut surface of the wood acidic components which are dissolved out of the wood or dispersed and dispersed in the coolant or lubricant or be emulsified or dissolved, neutralized and optionally precipitate, thereby neutralizing harmful to the environment acidic components and are rendered harmless.

Indem, wie dies einer Weiterbildung der Erfindung entspricht, die Korrosionsschutzzusammensetzung so ausgebildet, ist, dass eine Menge von 10 ppm bis 8000 ppm, insbesondere 500 ppm bis 5000 ppm an Basen in der gesamten Zusammensetzung enthalten ist, wird einerseits sichergestellt, dass eine Umweltbelastung auch bei Austreten der Korrosionsschutzzusammensetzung nicht zu befürchten ist und andererseits gleichzeitig der pH-Wert in dem gering basischen Bereich gehalten, um wieder eine Oberflächenkorrosion der damit behandelten Gegenstände befürchten zu müssen, noch eine zu starke Erhöhung des pH-Werts zu erreichen. Auch bei Einsatz von mehr als einer Base wird die Gesamtmenge an Basen nicht überschritten.By, as corresponds to a development of the invention, the anticorrosive composition is formed so that an amount of 10 ppm to 8000 ppm, in particular 500 ppm to 5000 ppm of bases in the total composition is included, on the one hand ensures that an environmental impact also at the same time the pH is kept in the low basic range in order to fear again a surface corrosion of the articles treated therewith, nor to achieve an excessive increase in the pH. Even when using more than one base, the total amount of bases is not exceeded.

Für eine sichere Lösung, insbesondere von einigen organischen Basen, welche beispielsweise direkt dem Schmieröl zugesetzt werden können, ist die Erfindung dahingehend weitergebildet, dass ein Alkohol, insbesondere gewählt aus C6 bis C10 Alkoholen, wie Octanol als Lösungsvermittler in der Korrosionsschutzzusammensetzung enthalten ist. Besonders bevorzugt ist hierbei gemäß der Erfindung der Zusatz von Decanol in einer Menge zwischen 0.07 Gew.-% und 0,8 Gew.-%, insbesondere 0,1 Gew.-% bis 0,5 Gew.-% der Zusammensetzung. Durch Zufügen geringer Mengen eines Alkohols gelingt es, die organischen Basen, wie beispielsweise Pyrrolidin oder 1-Methyl-pyrrolidin in Lösung zu bringen, ohne dass beispielsweise die Schmierwirkung des Schmieröls so weit herabgesetzt wird, dass dieses ineffizient wird. Trotz eines derartigen Zusatzes eines Lösungsvermittlers gelingt es, unmittelbar an der Schnittfläche saure Bestandteile zu neutralisieren und auszufällen, so dass das im Kreislauf geführte Schmieröl üblicherweise einen pH-Wert zwischen etwa neutral und etwa 9 aufweist und somit eine Beschädigung von Maschinenteilen mit Sicherheit hintangehalten werden kann.For a safe solution, in particular of some organic bases, which can be added directly to the lubricating oil, for example, the invention is further developed such that an alcohol, in particular selected from C 6 to C 10 alcohols, such as octanol as a solubilizer in the corrosion protection composition is included. According to the invention, the addition of decanol in an amount between 0.07% by weight and 0.8% by weight, in particular from 0.1% by weight to 0.5% by weight, of the composition is particularly preferred. By adding small amounts of an alcohol, it is possible to bring the organic bases, such as pyrrolidine or 1-methyl-pyrrolidine in solution without, for example, so far reduced the lubricating effect of the lubricating oil it will become inefficient. Despite such an addition of a solubilizer, it is possible to neutralize and precipitate acidic constituents directly at the cut surface, so that the recirculated lubricating oil usually has a pH between about neutral and about 9 and thus damage to machine parts can be stopped with certainty ,

Gemäß einer Weiterbildung der Erfindung ist die Korrosionsschutzzusammensetzung hierbei so ausgebildet, dass für einen Einsatz in einem geschlossenen System diese aus Schmieröl, wenigstens einer organischen Base und einem Alkohol sowie gegebenenfalls einer weiteren im Wasser löslichen Base und einem Emulgator zusammengesetzt ist, in welchem Fall ausgefällte Salze der in den Hölzern enthaltenen Säuren in der Praxis über ein Filter aus dem im Kreislauf geführten Öl entfernt werden. Für offene Systeme hat es sich hierbei als besonders vorteilhaft erwiesen, dass wenigstens eine anorganische Base, insbesondere eine Kombination aus Natriumhydrogencarbonat und Calciumacetat eingesetzt wird. Durch Zusatz derartiger Basen gelingt es, eine Korrosionsschutzzusammensetzung zur Verfügung zu stellen, welche einerseits die im Holz enthaltenen Säuren sicher und zuverlässig neutralisiert und gegebenenfalls ausfällt und weiterhin Salze bildet, welche biologisch verträglich sind, d.h. keinerlei Umweltschäden verursachen. Derartige Substanzen können daher unmittelbar in der Natur abgebaut werden, so dass ein Holzbearbeiten im offenen Kreislauf ohne jede Beeinträchtigung der Umwelt möglich wird. Da anorganische Basen üblicherweise in Schmieröl nicht löslich sind und auch in dem als Lösungsvermittler eingesetzten Alkohol nur bedingt löslich sind, wird die Lösung der anorganischen Basen dadurch erreicht, dass das auf der Oberfläche bzw. im Inneren des Holzes vorhandene Wasser als Lösungsmittel fungiert. Hierbei kann auch eine Mischung von verschiedenen Basen zum Einsatz gelangen, wobei die Menge an anorganischer Base sich nach der Menge an eingetragenem bzw. vorhandenem Wasser richtet bzw. auch im Verlaufe der Zeit langsam erhöht werden kann, wenn der Wassergehalt in dem System ansteigt.According to one development of the invention, the anticorrosive composition is in this case designed so that for use in a closed system it is composed of lubricating oil, at least one organic base and an alcohol and optionally a further water-soluble base and an emulsifier, in which case precipitated salts the acids contained in the woods are removed in practice via a filter from the circulated oil. For open systems, it has proved to be particularly advantageous that at least one inorganic base, in particular a combination of sodium bicarbonate and calcium acetate is used. By adding such bases, it is possible to provide a corrosion protection composition which on the one hand safely and reliably neutralizes and, if appropriate, precipitates the acids contained in the wood and further forms salts which are biocompatible, i. do not cause any environmental damage. Such substances can therefore be degraded directly in nature, so that a woodworking in an open circuit without any impairment of the environment is possible. Since inorganic bases are usually not soluble in lubricating oil and are only partially soluble in the alcohol used as a solubilizer, the solution of the inorganic bases is achieved in that the water present on the surface or in the interior of the wood acts as a solvent. Here, a mixture of different bases can be used, wherein the amount of inorganic base depends on the amount of water introduced or existing or can be slowly increased over time, as the water content in the system increases.

Indem, wie dies einer Weiterbildung der Erfindung entspricht, der Korrosionsschutzzusammensetzung ein Emulgator aus der Gruppe der Polyalkohole, ionischen oder nicht ionischen Tenside und Polyethylenglycolderivate, insbesondere Polysorbate zugesetzt ist, gelingt es insbesondere im geschlossenen System, eine Wasser-in-Öl Emulsion als Kühl- bzw. Schmiermittel im Kreislauf zu führen, in welcher Emulsion beliebige anorganische und organische Basen gelöst bzw. dispergiert sein können, wodurch eine besonders genaue und einfache Einstellung des gewünschten pH-Werts der Korrosionsschutzzusammensetzung auf Werte von über 7, insbesondere 9 ± 0,5 erreicht werden kann. Die Wasser-in-ÖI Emulsion entsteht hierbei direkt im System aus dem auf der Oberfläche bzw. dem Inneren der Hölzer vorhandenem Wasser sowie dem als Träger eingesetztem Schmieröl.By adding, as is the case to a development of the invention, to the anticorrosion composition an emulsifier from the group of polyalcohols, ionic or nonionic surfactants and polyethylene glycol derivatives, in particular polysorbates, it is possible to use a water-in-oil emulsion as cooling agent, especially in the closed system. or lubricant in the circuit, in which emulsion any inorganic and organic bases can be dissolved or dispersed, whereby a particularly accurate and easy adjustment of the desired pH of the corrosion protection composition to values of more than 7, in particular 9 ± 0.5 can be achieved. The water-in-oil emulsion is produced directly in the system from the water present on the surface or the inside of the woods as well as the lubricating oil used as carrier.

Eine derartige Korrosionsschutzzusammensetzung kann hierbei eine Wasser-in-Öl Emulsion sein, welche beispielsweise in einer wässrigen Phase der Emulsion einen Natriumhydrogencarbonat/Natriumcarbonatpuffer gelöst oder dispergiert aufweist und in einer einen Hauptbestandteil darstellenden Ölphase Diethylenamin gelöst aufweist. Mit einer derartigen Emulsion gelingt nicht nur eine zuverlässige Kühlung und Schmierung der mit Holz in Kontakt gelangenden Elemente, sondern auch eine besonders rasche und zuverlässige Neutralisation sämtlicher sauren Bestandteile direkt an der Schnittfläche des zu trennenden bzw. schneidenden Holzes.Such a corrosion protection composition may in this case be a water-in-oil emulsion which, for example, has a sodium hydrogencarbonate / sodium carbonate buffer dissolved or dispersed in an aqueous phase of the emulsion and has dissolved diethyleneamine in an oil phase representing a major constituent. With such an emulsion, not only a reliable cooling and lubrication of the elements coming into contact with wood, but also a particularly rapid and reliable neutralization of all acidic components directly on the cut surface of the wood to be cut or cut.

Es hat sich im Zusammenhang mit der vorliegenden Erfindung als vorteilhaft erwiesen, die Basen in einem stöchiometrischen Überschuss in Bezug auf die in dem zu bearbeitenden Holz enthaltenen Säuren einzusetzen, wobei der Überschuss üblicherweise in einem Bereich von 2:1 bis 10:1, insbesondere 3:1 bis 6:1 gewählt ist. Eine derartige Überschussführung der Base hat sich vor allem deshalb als günstig erwiesen, da die Mengen an sauren Bestandteilen des Holzes in Abhängigkeit von der Art des zu bearbeitenden, insbesondere zu schneidenden Holzes, von der Herkunft des Holzes und weiteren Faktoren stark variieren, so dass sich für eine zuverlässige Neutralisation der sauren Bestandteile und somit einen effizienten Korrosionsschutz an den mit den sauren Bestandteilen des Holzes in Kontakt gelangenden Teilen einer Holzbearbeitungsmaschine, wie der Sägebänder ein Überschuss an Base als vorteilhaft erwiesen hat. Der Überschuss ist hierbei jedoch nicht so groß gewählt, dass die basische Lösung selbst korrodierend auf die in Kontakt mit dem Holz bzw. der Base befindliche metallischen Elemente der Holzbearbeitungsmaschine wirken würde.It has proven advantageous in the context of the present invention to use the bases in a stoichiometric excess with respect to the acids contained in the wood to be processed, the excess usually being in the range from 2: 1 to 10: 1, in particular 3 : 1 to 6: 1 is selected. Such an excess guide of the base has proved to be particularly favorable because the amounts of acidic components of the wood depending on the type of wood to be processed, in particular to be cut wood, vary greatly from the origin of the wood and other factors, so that for a reliable neutralization of the acidic constituents and thus an efficient corrosion protection on the parts of a woodworking machine which come into contact with the acidic constituents of the wood, as the saw bands have proven an excess of base to be advantageous. However, the excess is not chosen so large that the basic solution itself would corrosively affect the metal elements of the woodworking machine in contact with the wood or the base.

Die Erfindung zielt weiterhin darauf ab, ein Verfahren zum Verhindern der Korrosion von metallischen sich in Kontakt mit zerkleinerndem Holz befindlichen Elementen einer Holzbearbeitungsmaschine wie Sägegatter, Sägebänder, Hobeln oder Fräser zur Verfügung zu stellen, bei welchem nicht nur die Korrosion dieser Elemente sicher und zuverlässig verhindert wird, sondern welches Verfahren auch einfach und zuverlässig ausführbar ist und überdies die Lebensdauer der ein derartiges Verfahren einsetzenden Vorrichtungen erhöht.The invention also aims to provide a method for preventing the corrosion of metallic elements in contact with comminuting wood of a woodworking machine such as saw gates, saw bands, planers or milling cutters, in which not only the corrosion of these elements reliably and reliably prevents is, but which method is also simple and reliable executable and also increases the life of the device using such a method.

Zur Lösung dieser Aufgabe ist das erfindungsgemäße Verfahren im Wesentlichen dadurch gekennzeichnet, dass dem Kühlmittel wenigstens eine Lösung, alkoholische Lösung oder Dispersion von wenigstens einer Base, gewählt aus der Gruppe Na(HCO3), 2 Na(HCO3) / Na2CO3, Ca(C2H3O2)2, Pyrrolidin, Piperazin, 1-Methyl-pyrrolidin, Benzylamine, Dibenzylamin, Dioctylamin, Diethylenamin, basischen Aminosäuren, wie Lysin, Arginin, Histidin oder Prolin sowie deren basischen Salzen und Carbonsäureester sowie gegebenenfalls ein Emulgator zudosiert und mit dem Kühlmittel vermischt wird und dass ein pH-Wert des Kühlmittels vor seinem Aufbringen auf die Elemente auf Werte von über 7, insbesondere 9 ± 0,5 eingestellt wird. Indem mit dem Kühlmittel wenigstens eine Lösung oder Dispersion von wenigstens einer Base zudosiert wird und ein pH-Wert des Kühlmittels vor seinem Aufbringen auf die Elemente auf Werte von über 7, insbesondere 9 ± 0,5 eingestellt wird, gelingt es, das Verfahren so zu führen, dass möglichst wenige Teile der Holzbearbeitungsmaschine mit potentiell korrodierenden Substanzen in Kontakt gelangen und insbesondere der basische pH-Wert so niedrig gewählt wird, dass eine Korrosion durch die Base an der Holzbearbeitungsmaschine selbst nicht stattfinden kann, jedoch gleichzeitig sichergestellt wird, dass die im Holz enthaltenen Säuren durch die zudosierten Basen sowie dem in oder an der Oberfläche des Holzes vorhandenen Wassers sicher und zuverlässig neutralisiert werden.To solve this problem, the inventive method is essentially characterized in that the coolant at least one solution, alcoholic solution or dispersion of at least one base selected from the group Na (HCO 3 ), 2 Na (HCO 3 ) / Na 2 CO 3 , Ca (C 2 H 3 O 2 ) 2 , pyrrolidine, piperazine, 1-methylpyrrolidine, benzylamines, dibenzylamine, dioctylamine, diethyleneamine, basic amino acids, such as lysine, arginine, histidine or proline, and their basic salts and carboxylic esters, and optionally one Emulsifier is metered and mixed with the coolant and that a pH of the coolant before its application to the elements to values of more than 7, in particular 9 ± 0.5 is set. By adding at least one solution or dispersion of at least one base with the coolant and adjusting the pH of the coolant to values above 7, in particular 9 ± 0.5, before it is applied to the elements, the method succeeds in this way lead that as few parts of the woodworking machine with potentially corrosive substances come into contact and in particular the basic pH is chosen so low that corrosion by the base on the woodworking machine itself can not take place, but at the same time it ensures that the wood contained acids are reliably and reliably neutralized by the dosed bases and the water present in or on the surface of the wood.

Gemäß einer Weiterbildung des Verfahrens gemäß der Erfindung ist dieses dadurch gekennzeichnet, dass das Kühlmittel im Kreislauf geführt wird, dass der pH-Wert wenigstens vor und nach dem Element gemessen wird und dass die Menge der zuzuordnenden Base anhand des nach dem Element gemessenen pH-Werts bestimmt wird. Durch das im Kreislauf führen des Kühlmittels wird sichergestellt, dass einerseits die Menge an benötigtem Kühlmittel so gering wie möglich gehalten wird und andererseits jegliche Umweltverunreinigung durch in die Umwelt ausgetragenes Kühlmittel hintangehalten wird. Eine derartige Verfahrensführung ist insbesondere bei Einsatz vom Schmierölen als Kühlmittel ebenso wie bei Wasser-in-Schmieröl Emulsionen als Kühlmittel bevorzugt, da diese Substanzen üblicherweise biologisch nicht oder nur schwer abbaubar sind.According to one embodiment of the method according to the invention, this is characterized in that the coolant is recycled, that the pH is measured at least before and after the element and that the amount of base to be assigned on the basis of the pH measured after the element is determined. By circulating the coolant ensures that on the one hand, the amount of required coolant is kept as low as possible and on the other hand, any environmental pollution is discouraged by discharged into the environment coolant. Such a procedure is particularly preferred when using the lubricating oils as a coolant as well as water-in-lubricating oil emulsions as a coolant, since these substances are usually not biologically or only with difficulty degradable.

Indem, wie dies einer Weiterbildung der Erfindung entspricht, die wenigstens eine Base als konzentrierte alkoholische Lösung dem Kühlmittel zugesetzt wird, gelingt es, das Volumen des Kühlmittels nicht übermäßig zu erhöhen.By, as corresponds to a development of the invention, the at least one base is added to the coolant as a concentrated alcoholic solution, it is possible not to increase the volume of the coolant excessively.

Indem der pH-Wert wenigstens vor und nach dem Element gemessen wird, gelingt es, sicher und zuverlässig die Menge an der wenigstens einen erforderlichen Base rechnerisch zu ermitteln, wodurch eine zu geringe oder eine zu große Menge an Base sicher hintangehalten wird und gleichzeitig vermieden wird, dass die nur ungefähr bekannte Größe und insbesondere die sich immer ändernde Menge an Säure im Holz bestimmt wird, was verfahrenstechnisch einen extrem großen Aufwand erfordern würde.By measuring the pH at least before and after the element, it is possible to reliably and reliably determine the amount of the at least one required base by calculation, as a result of which too low or too large an amount of base is reliably prevented and at the same time avoided in that the size, which is only approximately known, and in particular the ever-changing amount of acid in the wood, is determined, which would require extremely great expense in terms of process engineering.

Indem, wie dies einer Weiterführung des Verfahren gemäß der Erfindung entspricht, das mit wenigstens einer Base versetzte Kühlmittel über Sprühdüsen auf das Element, beispielsweise ein Sägeband, Sägeblatt oder einen Schaftfräser aufgebracht wird, wird ein Einsatz des Kühlmittels an dem exakt dafür gedachten Ort, nämlich dem jeweiligen Element gewährleistet und insbesondere eine effiziente Kühlung und gleichzeitig ein exakter Einsatz der Base, d.h. des Neutralisationsmittels am Ort des Auftretens der Säuren gewährleistet.By applying, as is the case with a continuation of the method according to the invention, the coolant mixed with at least one base to the element, for example a saw blade, saw blade or an end mill, via spray nozzles, an application of the coolant takes place in the exact place intended, namely ensures the respective element and in particular an efficient cooling and at the same time an exact use of the base, ie of the neutralizing agent is ensured at the place of occurrence of the acids.

Um nicht eine Überfrachtung des Kühlmittels mit neutralisierten, gegebenenfalls ausgefällten Salzen der im Holz enthaltenen Säuren bzw. eine zu hohe Konzentration an Base in dem Kühlmittel sicher hintanzuhalten, wird das Verfahren, wie dies einer Weiterbildung der Erfindung entspricht, so geführt, dass das Kühlmittel im Kreislauf geführt wird, und dass frisches mit wenigstens einer Base versetztes Kühlmittel vor dem Element zudosiert wird, und dass kontinuierlich ein Teil des Kühlmittels nach dem Element aus dem Kreislauf entfernt wird. Durch eine derartige Verfahrensführung steht immer ausreichend frisches Kühlmittel für das Kühlen der Holzbearbeitungsmaschine zur Verfügung und überdies werden kontinuierlich die Reaktionsprodukte der Base mit den im Holz enthaltenen Säuren aus dem System entfernt, so dass es zu einer Überfrachtung des Kühlmittels mit diesen Produkten nicht kommen kann.In order not to safely prevent the overloading of the coolant with neutralized, optionally precipitated salts of the acids contained in the wood or an excessively high concentration of base in the coolant, the method, as corresponds to a further development of the invention, is carried out in such a way that the coolant in the Circulation is performed, and that fresh mixed with at least one base added coolant before the element, and that continuously a portion of the coolant is removed after the element from the circulation. By such a process management is always sufficient fresh coolant for cooling the woodworking machine available and also continuously the reaction products of the base are removed with the acids contained in the wood from the system, so that it can not come to a Überfrachtung the coolant with these products.

Um eine sichere und zuverlässige Entfernung von gegebenenfalls ausgefällten Salzen der im Holz enthaltenen Säuren mit den Basen zu gewährleisten, wird bevorzugt das Verfahren so geführt, dass das im Kreislauf geführte Kühlmittel über ein Filter geleitet wird.In order to ensure a safe and reliable removal of optionally precipitated salts of the acids contained in the wood with the bases, the method is preferably performed so that the recirculated coolant is passed through a filter.

Um insbesondere auch bei wasserhaltigen Systemen, insbesondere wasserhaltigen Hölzern bzw. dem Sägen von nassen Hölzern den erfindungsgemäßen Effekt sicher und zuverlässig zu erzielen, ist das erfindungsgemäße Verfahren dahingehend weitergebildet, dass nach dem Element ein Messfühler zur Bestimmung eines Wassergehalts im System angeordnet wird und dass eine Zusammensetzung der in dem frisch zudosierten Kühlmittel enthaltenden Mischung von Basen in Abhängigkeit von dem gemessenen Wassergehalt eingestellt wird. Durch die Bestimmung des Wassergehalts im System kann die erforderliche Menge an anorganischen Basen sicher und zuverlässig ermittelt werden, so dass die exakte Menge einer gegebenenfalls zuzudosierenden anorganischen Base bestimmt werden kann.In order to achieve the effect according to the invention safely and reliably especially in water-containing systems, in particular water-containing woods or the sawing of wet woods, the inventive method is further developed such that after the element a sensor for determining a water content in the system is arranged and that Composition of in the freshly metered coolant containing mixture of bases depending on the measured water content is adjusted. By determining the water content in the system, the required amount of inorganic bases can be reliably and reliably determined, so that the exact amount of an inorganic base to be metered in can be determined.

Im Zusammenhang mit der erfindungsgemäßen Vorrichtung sowie dem erfindungsgemäßen Verfahren ist die nicht unbeträchtliche Menge an Wasser, welche mit dem zu zerkleinernden Holz in das System eingetragen wird, nicht außer Acht zu lassen und es hat sich als günstig erwiesen, dass zur Neutralisation der im Holz enthaltenen Säuren zusätzlich zu den im Schmieröl enthaltenen organischen Basen auch anorganische Basen zum Einsatz gelangen können, welche bekanntermaßen in wässrigen Lösungsmitteln besser löslich sind als in organischen Lösungsmitteln bzw. in Ölen, um auf diese Weise eine besonders effiziente Neutralisierung der in dem zu schneidenden Holz enthaltenen Säuren zu erreichen.In connection with the device according to the invention and the method according to the invention, the not inconsiderable amount of water, which is registered with the wood to be crushed into the system, not to be ignored and it has proved to be beneficial that for neutralization contained in the wood Acids in addition to the organic bases contained in the lubricating oil and inorganic bases can be used, which are known to be more soluble in aqueous solvents than in organic solvents or in oils, in order to achieve a particularly efficient neutralization of the acids contained in the wood to be cut to reach.

Im Rahmen der vorliegenden Anmeldung wird der Ausdruck "Kühlmittel" für reine Kühlmittel, wie beispielsweise eine Ölkühlung eines Sägeblatts oder -bandes verwendet, ebenso wie für Schmiermittel, welche zusätzlich zu seiner schmierenden Wirkung auch einen Kühleffekt an dem in Kontakt mit dem Holz befindlichen Element der Holzbearbeitungsmaschine vornehmen, wie beispielsweise einem Schmieröl.In the context of the present application, the term "coolant" is used for pure coolants, such as oil cooling of a saw blade or belt, as well as for lubricants which, in addition to its lubricating effect, also have a cooling effect on the element in contact with the wood Make woodworking machine, such as a lubricating oil.

Der Ausdruck eines sich in Kontakt befindlichen "Elements" einer Holzbearbeitungsmaschine umfasst hierbei jegliche Teile von derartigen Maschinen, wie Bandsägeblätter, Kreissägeblätter oder Gattersägeblätter, Hobeln, Schaftfräsen, oder Bandfräsen verstanden.The expression of a contacting "element" of a woodworking machine here means any parts of such machines, such as band saw blades, circular saw blades or gang saw blades, planing, end milling, or band milling understood.

Die Erfindung wird nachfolgend anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. In diesen zeigen:

  • Fig. 1 eine schematische Darstellung einer mit einem Korrosionsschutzzusammensetzung gemäß der Erfindung gekühlten Säge bzw. dem Kreislauf des Kühl- und der Korrosionsschutzzusammensetzung,
  • Fig. 2 eine analoge Darstellung wie in Fig. 1, einer anderen Ausbildung des Kühl- bzw.
  • Korrosionsschutzzusammensetzungskreislaufs, und
  • Fig. 3 eine analoge Darstellung wie in Fig. 1 eine weitere Ausbildung des Kühl- bzw. Korrosionsschutzzusammensetzungskreislaufs.
The invention will be explained in more detail with reference to embodiments shown in the drawing. In these show:
  • Fig. 1 a schematic representation of a cooled with a corrosion protection composition according to the invention saw or the cycle of the cooling and corrosion protection composition,
  • Fig. 2 an analog representation as in Fig. 1 , another training of the cooling or
  • Corrosion protection composition circuit, and
  • Fig. 3 an analog representation as in Fig. 1 a further embodiment of the cooling or corrosion protection composition circuit.

Im Einzelnen ist in Fig. 1 mit 1 schematisch eine Säge bezeichnet, in welcher entsprechend dem Pfeil 2 Holz zugeführt wird und bei Pfeil 3 Schnittgut ausgetragen wird. Der Säge wird mit einer Base versetztes Kühlmittel über Leitung 4 aufgebracht und am Austrag der Säge bei Leitung 5 wiederum ausgetragen. Sowohl in die Zufuhrleitung 4 als auch in die Austragsleitung 5 ist jeweils ein pH-Sensor 6 bzw. 7 zwischengeschaltet, mit welchem der pH-Wert des mit Base versetzten Kühlmittels, welches als Korrosionsschutzzusammensetzung dient, ermittelt wird. Der pH-Wert bei dem pH-Sensor 6 ist hierbei so gewählt, dass er 9 nicht übersteigt und der pH-Wert bei dem pH-Sensor 7 sollte den pH-Wert von 7 nicht unterschreiten.In detail is in Fig. 1 1 schematically denotes a saw, in which according to the arrow 2 wood is fed and discharged at the arrow 3 clippings. The saw is applied with a Base offset coolant via line 4 and again discharged at the discharge of the saw at line 5. Both in the supply line 4 and in the discharge line 5, a pH sensor 6 or 7 is interposed in each case, with which the pH value of the offset with base coolant, which serves as a corrosion protection composition, is determined. The pH value in the case of the pH sensor 6 is chosen so that it does not exceed 9, and the pH value in the case of the pH sensor 7 should not fall below the pH of 7.

Mit 8 ist ein Wegeventil bezeichnet, über welches zumindest Teile des Kühlmittels aus dem Kreislauf ausgetragen werden können und die restliche mit noch aktiver Base bzw. teilweise mit Reaktionsprodukten aus Base und Säure in Holz enthaltenen Säure befrachteten Korrosionsschutzzusammensetzung wird über Leitung 9 im Kreislauf geführt, und bei zwei weiteren Ventilen 10 bzw. 11 wird getrennt voneinander neues unverbrauchtes Kühlmittel über Leitung 12 eingetragen bzw. über Leitung 13 eine Lösung oder Dispersion der Base in einem Lösungsvermittler, wie einem Alkohol, zudosiert.8 designates a directional control valve, via which at least parts of the coolant can be discharged from the circulation, and the remaining anticorrosive composition, which is still laden with active base or partially with reaction products of base and acid in wood, is recirculated via line 9, and in the case of two further valves 10 or 11, new unused coolant is introduced separately via line 12 or, via line 13, a solution or dispersion of the base in a solubilizer, such as an alcohol, is added.

Einer derartigen Kreislaufführung gelingt es, die Mengen an zuzusetzender Korrosionsschutzzusammensetzung so gering wie möglich zu halten und gleichzeitig sicherzustellen, dass im Bereich der Säge der pH-Wert immer ausreichend hoch ist, um die im Holz enthaltenen Säuren unmittelbar vor Ort zu neutralisieren und in der Folge, so weit als möglich, auszutragen, ohne dass übermäßige Mengen an Korrosionsschutzzusammensetzung verbraucht werden oder ohne dass übermäßige Mengen an Öl bei der Kreislaufführung jedes Mal ersetzt werden müssen.Such a circulation makes it possible to keep the amounts of anti-corrosion composition to be added as low as possible and at the same time to ensure that in the area of the saw, the pH is always sufficiently high to neutralize the acids contained in the wood directly on site and subsequently to discharge as much as possible without consuming excessive amounts of anticorrosive composition or without having to replace excessive amounts of oil in the recirculation process each time.

Die in Fig. 2 gezeigte Vorrichtung entspricht im Wesentlichen jener von Fig. 1 und die Bezugszeichen von Fig. 1 sind so weit als möglich beibehalten. Die einzigen Unterschiede bei der Vorrichtung gemäß Fig. 2 liegen darin, dass in der Rückführungsleitung 9 zusätzlich ein Filter 14 zwischengeschaltet ist, um ausgefällte Salze der organischen Säure mit der zugesetzten Base aus dem Kühl- bzw. Schmiermittelkreislauf abzufiltrieren und somit so gering wie möglich verunreinigtes Kühlmittel im Kreislauf zu führen. Ein weiterer Unterschied der Vorrichtung der Fig. 2 zu jener von Fig. 1 ist, dass bei Ventil 10 gleichzeitig erforderliche Mengen an Kühlmittel und an Basen über Leitung 12 zudosiert werden, welche Variante der Vorrichtung immer dann von Vorteil ist, wenn beispielsweise eine Wasser-in-Öl Emulsion als Korrosionsschutzmittel mit dem aus dem Holz stammenden Wasser gebildet wird und zum Einsatz gelangt.In the Fig. 2 The device shown essentially corresponds to that of Fig. 1 and the reference numerals of Fig. 1 are maintained as much as possible. The only differences in the device according to Fig. 2 lie in the fact that in the return line 9 in addition a filter 14 is interposed to filter off precipitated salts of the organic acid with the added base from the coolant or lubricant circuit and thus to lead as little as possible contaminated coolant in the circuit. Another difference of the device Fig. 2 to that of Fig. 1 is that with valve 10 simultaneously required amounts of coolant and are added to bases via line 12, which variant of the device is always advantageous if, for example, a water-in-oil Emulsion is formed as a corrosion inhibitor with the water derived from the wood and is used.

In Fig. 3, in welcher wiederum die Bezugszeichen der Fig. 1 und Fig. 2 beibehalten sind, ist die Einbringung der basischen Lösung in die Säge abweichend ausgebildet. In Fig. 3 ist mit 15 ein Reintank bezeichnet, in welchem im Wesentlichen reines Schmieröl enthalten ist. In diesen Reintank mündet die Rückführungsleitung 9 aus der Säge 1. Reine Flüssigkeit bzw. im Kreislauf geführte Flüssigkeit wird in der Folge in einen Mischer 16 eingebracht und dort mit Konzentrat aus einem Vorratstank 17 versetzt, bis die gewünschte Konzentration an Base in dem Kühlmittel erreicht ist, welche z.B. mittels eines Refraktometers oder einer Dichtungsmessung ermittelt werden kann, da der pH-Wert insbesondere bei Bildung eines Puffers sich kaum durch die Änderung der Konzentration andern wird. Hierbei kann entweder, wie dies in Fig. 3 dargestellt ist, die pH-Messung wiederum in der Zufuhrleitung 4 in die Säge 1 vorgenommen werden oder direkt in dem Mischer 16. Als Mischer kann ein herkömmlicher Venturi- oder Proportionalmischer eingesetzt werden. Es erübrigt sich festzuhalten, dass auch die Variante gemäß Fig. 3 mit einem Filter zum Abtrennen von gegebenenfalls ausgefällten Salzen versehen sein kann.In Fig. 3 in which again the reference numerals of Fig. 1 and Fig. 2 are maintained, the introduction of the basic solution in the saw is designed differently. In Fig. 3 15 is a clean tank in which essentially pure lubricating oil is contained. Pure liquid or recirculated liquid is subsequently introduced into a mixer 16 where it is mixed with concentrate from a storage tank 17 until the desired concentration of base in the coolant is reached which can be determined, for example, by means of a refractometer or a seal measurement, since the pH, in particular when a buffer is formed, will scarcely change as a result of the change in concentration. Here, either, as in Fig. 3 is shown, the pH measurement in turn be made in the supply line 4 in the saw 1 or directly in the mixer 16. As a mixer, a conventional venturi or proportional mixer can be used. It is needless to say that the variant according to Fig. 3 may be provided with a filter for separating optionally precipitated salts.

Die Diagramme der Beispiele 1 bis 3 wurden anhand einer Säge beispielhaft dargestellt, wobei an der Kreislaufführung und Zudosierung von Basen keinerlei Änderungen vorgenommen werden müssen, wenn das System beispielsweise an einem Fräser, einem Hobel oder einer speziellen Säge, wie einer Bandsäge oder Gattersäge eingesetzt wird.The diagrams of Examples 1 to 3 were exemplified by means of a saw, wherein the circulation and metering of bases no changes must be made when the system is used for example on a router, a planer or a special saw, such as a band saw or gang saw ,

Claims (15)

Korrosionsschutzzusammensetzung für metallische, in Kontakt mit zu zerkleinerndem Holz befindliche Elemente einer Holzbearbeitungsmaschine, insbesondere einer Säge (1), wie Bandsägeblätter, Kreissägeblätter oder Gattersägeblätter, enthaltend wenigstens einen flüssigen Träger sowie wenigstens eine in dem Träger gelöste, emulgierte oder dispergierte Base, sowie gegebenenfalls weitere Bestandteile gewählt aus einem Lösungsvermittler für die Base in dem Träger, einem Emulgator und/oder einem Stabilisator, dadurch gekennzeichnet, dass dem aus der Gruppe der Schmieröle gewählten flüssigen Träger wenigstens eine Base gewählt aus der Gruppe Na(HCO3), 2 Na(HCO3)/Na2(CO3), Ca(C2H3O2)2, Pyrrolidin, Piperazin, 1-Methyl-pyrrolidin, Benzylamine, Dibenzylamin, Dioctylamin, Diethylenamin, basischen Aminosäuren, wie Lysin, Arginin, Histidin oder Prolin sowie deren basische Salze und Carbonsäureester, zugesetzt ist, und dass ein pH-Wert der Zusammensetzung auf Werte von über 7, insbesondere 9 ± 0,5 eingestellt ist.Anti-corrosive composition for metallic elements of a woodworking machine, in particular a saw (1), such as band saw blades, circular saw blades or gang saw blades, containing at least one liquid carrier and at least one emulsified or dispersed base dissolved in the carrier, and optionally further Ingredients selected from a solubilizer for the base in the carrier, an emulsifier and / or a stabilizer, characterized in that the selected from the group of lubricating oils liquid carrier at least one base selected from the group Na (HCO 3 ), 2 Na (HCO 3 ) / Na 2 (CO 3 ), Ca (C 2 H 3 O 2 ) 2 , pyrrolidine, piperazine, 1-methylpyrrolidine, benzylamines, dibenzylamine, dioctylamine, diethyleneamine, basic amino acids such as lysine, arginine, histidine or proline and their basic salts and carboxylic acid esters are added, and that a pH of the composition to value e is set above 7, in particular 9 ± 0.5. Korrosionsschutzzusammensetzung nach Anspruch 1, dadurch gekennzeichnet, dass eine Menge von 100 ppm bis 8000 ppm, insbesondere 500 ppm bis 5000 ppm an Basen enthalten ist.A corrosion protection composition according to claim 1, characterized in that an amount of 100 ppm to 8000 ppm, in particular 500 ppm to 5000 ppm of bases is contained. Korrosionsschutzzusammensetzung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass sie aus Schmieröl, wenigstens einer organischen Base und einem Alkohol sowie gegebenenfalls einer weiteren in Wasser löslichen Base und einem Emulgator zusammengesetzt ist.Corrosion protection composition according to claim 1 or 2, characterized in that it is composed of lubricating oil, at least one organic base and an alcohol and optionally a further water-soluble base and an emulsifier. Korrosionsschutzzusammensetzung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass der Alkohol, insbesondere gewählt aus C6 bis C10 Alkoholen als Lösungsvermittler enthalten ist.Corrosion protection composition according to claim 1, 2 or 3, characterized in that the alcohol, in particular selected from C 6 to C 10 alcohols is contained as a solubilizer. Korrosionsschutzzusammensetzung nach Anspruch 4, dadurch gekennzeichnet, dass als Lösungsvermittler Decanol in einer Menge zwischen 0,07 Gew.-% und 0,8 Gew.-%, insbesondere 0,1 Gew.-% bis 0,5 Gew.-% der Zusammensetzung enthalten ist.Anti-corrosion composition according to claim 4, characterized in that as a solubilizer decanol in an amount between 0.07 wt .-% and 0.8 wt .-%, in particular 0.1 wt .-% to 0.5 wt .-% of the composition is included. Korrosionsschutzzusammensetzung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Emulgator aus der Gruppe der Polyalkohole, ionischen oder nichtionischen Tenside und Polyethylenglycolderivate, insbesondere Polysorbate gewählt ist.Corrosion protection composition according to one of claims 1 to 5, characterized in that the emulsifier is selected from the group of polyalcohols, ionic or nonionic surfactants and polyethylene glycol derivatives, in particular polysorbates. Korrosionsschutzzusammensetzung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass ein Stabilisator, insbesondere Essigsäure enthalten ist.Corrosion protection composition according to one of claims 1 to 6, characterized in that a stabilizer, in particular acetic acid is contained. Korrosionsschutzzusammensetzung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Basen der Zusammensetzung in einem stöchiometrischen Überschuss, insbesondere in einem Verhältnis von 2:1 bis 10:1, insbesondere 3:1 bis 6:1 in Bezug auf in zu zerkleinerndem Holz an der Kontaktfläche zu dem Element enthaltenen Säurebestandteile enthalten sind.Anticorrosive composition according to one of claims 1 to 7, characterized in that the bases of the composition in a stoichiometric excess, in particular in a ratio of 2: 1 to 10: 1, in particular 3: 1 to 6: 1 with respect to wood to be crushed contained at the contact surface to the element acid components. Verfahren zum Verhindern der Korrosion von metallischen, sich in Kontakt mit zu zerkleinerndem Holz befindlichen Elementen einer Holzbearbeitungsmaschine, insbesondere einer Säge (1), wie Bandsägeblättern, Kreissägeblättern oder Gattersägeblättern, bei welchen die Elemente während ihres Kontakt mit zu zerkleinerndem Holz mit einem aus Schmierölen gewählten Kühlmittel gekühlt werden, dadurch gekennzeichnet, dass dem Kühlmittel wenigstens eine alkoholische Lösung von wenigstens einer Base, gewählt aus der Gruppe Na(HCO3), 2 Na(HCO3) / Na2CO3, Ca(C2H3O2)2, Pyrrolidin, Piperazin, 1-Methyl-pyrrolidin, Benzylamine, Dibenzylamin, Dioctylamin, Diethylenamin, basischen Aminosäuren, wie Lysin, Arginin, Histidin oder Prolin sowie deren basischen Salzen und Carbonsäureester sowie gegebenenfalls ein Emulgator zudosiert und mit dem Kühlmittel vermischt wird und dass ein pH-Wert des Kühlmittels vor seinem Aufbringen auf die Elemente auf Werte über 7, insbesondere 9 ± 0,5 eingestellt wird.A method of preventing the corrosion of metallic elements in contact with wood to be shredded, a woodworking machine, in particular a saw (1), such as band saw blades, circular saw blades or gang saw blades, in which the elements, during their contact with wood to be shredded, are selected from lubricating oils Coolant to be cooled, characterized in that the coolant at least one alcoholic solution of at least one base selected from the group Na (HCO 3 ), 2 Na (HCO 3 ) / Na 2 CO 3 , Ca (C 2 H 3 O 2 ) 2 , pyrrolidine, piperazine, 1-methyl-pyrrolidine, benzylamines, dibenzylamine, dioctylamine, diethyleneamine, basic amino acids such as lysine, arginine, histidine or proline and their basic salts and carboxylic acid ester and optionally an emulsifier is added and mixed with the coolant and that a pH of the coolant before its application to the elements to values above 7, in particular 9 ± 0.5 is set. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass das Kühlmittel im Kreislauf geführt wird, dass der pH-Wert wenigstens vor und nach dem Element gemessen wird und dass die Menge der wenigstens einen zuzudosierenden Base anhand des nach dem Element gemessenen pH-Werts bestimmt wird.A method according to claim 9, characterized in that the coolant is recycled, that the pH is measured at least before and after the element and that the amount of at least one base to be metered is determined by the pH measured after the element. Verfahren nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass die wenigstens eine Base als konzentrierte alkoholische Lösung dem Kühlmittel zugesetzt wird.A method according to claim 9 or 10, characterized in that the at least one base is added to the coolant as a concentrated alcoholic solution. Verfahren nach Anspruch 9, 10 oder 11 dadurch gekennzeichnet, dass das mit der wenigstens einen Base versetzte Kühlmittel über Sprühdüsen auf das Element aufgebracht wird.A method according to claim 9, 10 or 11, characterized in that the offset with the at least one base coolant is applied via spray nozzles on the element. Verfahren nach einem der Ansprüche 9 bis 12, dadurch gekennzeichnet, dass das Kühlmittel im Kreislauf geführt wird und dass frisches mit wenigstens einer Base versetztes Kühlmittel vor dem Element zudosiert wird und dass kontinuierlich ein Teil des Kühlmittels nach dem Element aus dem Kreislauf entfernt wird.Method according to one of claims 9 to 12, characterized in that the coolant is recycled and that fresh mixed with at least one base Coolant is metered in front of the element and that continuously a portion of the coolant is removed after the element from the circulation. Verfahren nach einem der Ansprüche 9 bis 13, dadurch gekennzeichnet, dass das im Kreislauf geführte Kühlmittel über ein Filter (14) geleitet wird.Method according to one of claims 9 to 13, characterized in that the recirculated coolant is passed through a filter (14). Verfahren nach einem der Ansprüche 9 bis 14, dadurch gekennzeichnet, dass nach dem Element ein Messfühler zur Bestimmung eines Wassergehalts im System angeordnet wird und dass eine Zusammensetzung der in dem frisch zudosierten Kühlmittel enthaltenen Mischung von Basen in Abhängigkeit von dem gemessenen Wassergehalt eingestellt wird.Method according to one of claims 9 to 14, characterized in that after the element, a sensor for determining a water content in the system is arranged and that a composition of the mixture of bases contained in the freshly metered coolant is adjusted depending on the measured water content.
EP15450016.9A 2014-04-03 2015-04-01 Corrosion inhibitor composition and method for preventing corrosion of metal borders of a saw in contact with wood to be cut Not-in-force EP2927348B1 (en)

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US3156274A (en) * 1961-07-27 1964-11-10 Alexander J Golick Mist lubricated ripsawing method and mechanisms
US5372220A (en) * 1992-06-01 1994-12-13 Bostik, Inc. Water based lubricant containing polytetrafluoroethylene
WO2007130836A1 (en) * 2006-05-05 2007-11-15 Angus Chemical Company Metalworking fluids comprising neutralized fatty acids
KR20120140006A (en) * 2011-06-20 2012-12-28 정재철 Lubricating oil for wood processing and process of the same that

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JPH02135306A (en) * 1988-11-16 1990-05-24 Nippon Telegr & Teleph Corp <Ntt> Laser diode module
JP5081878B2 (en) * 2009-08-26 2012-11-28 株式会社ネオス Water-soluble metalworking fluid composition
JP5081879B2 (en) * 2009-08-26 2012-11-28 株式会社ネオス Water-soluble metalworking fluid composition

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156274A (en) * 1961-07-27 1964-11-10 Alexander J Golick Mist lubricated ripsawing method and mechanisms
US5372220A (en) * 1992-06-01 1994-12-13 Bostik, Inc. Water based lubricant containing polytetrafluoroethylene
WO2007130836A1 (en) * 2006-05-05 2007-11-15 Angus Chemical Company Metalworking fluids comprising neutralized fatty acids
KR20120140006A (en) * 2011-06-20 2012-12-28 정재철 Lubricating oil for wood processing and process of the same that

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