CN111909769A - Water-soluble lubricating liquid and aluminum cold rolling processing method - Google Patents
Water-soluble lubricating liquid and aluminum cold rolling processing method Download PDFInfo
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- 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
- C10M173/00—Lubricating compositions containing more than 10% water
- C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
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- 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
- C10M2201/02—Water
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- 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
- C10M2201/085—Phosphorus oxides, acids or salts
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- 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
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- 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
- C10M2209/105—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing three carbon atoms only
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- 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
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- 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
- C10M2215/042—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Alkoxylated derivatives thereof
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Abstract
The embodiment of the invention provides a water-soluble lubricating liquid and a processing method for aluminum cold rolling. The water-soluble lubricating liquid provided by the embodiment of the invention can eliminate or greatly reduce scrappage caused by water corrosion white spots generated during rolling of aluminum plates or aluminum foil strips; on the other hand, the phenomenon that the surface of an aluminum coil obtained by rolling an aluminum plate by using the water-soluble lubricating liquid provided by the embodiment of the invention is blackened due to water corrosion is also well improved.
Description
Technical Field
The embodiment of the invention relates to aluminum material processing, in particular to the field of rolling, and particularly relates to a water-soluble lubricating liquid and an aluminum cold rolling processing method.
Background
Cold rolling of aluminium is one of the most important processes in aluminium processing, and the lubricating fluid is critical to the continuous production of cold rolled aluminium and to the quality of the rolled aluminium sheet or foil finished product.
The conventional cold rolling process of aluminum plate strip or aluminum foil generally adopts light pure oil (such as D60, D80, D100 and the like) and lubricating oil consisting of additives for rolling. This lubricating oil technique has limited rolling speed and pass reduction due to insufficient cooling rate. Meanwhile, the light pure oil has low viscosity, is very easy to volatilize and cause fire, has high oil consumption and causes high rolling cost.
The application of the water-soluble lubricating liquid in aluminum cold rolling can solve the problem of the pure oil rolling oil. However, the water-soluble lubricating liquid has the problem that the surface of an aluminum plate or an aluminum foil is easy to generate water corrosion after rolling, so that water corrosion white spots are generated on the surface of the aluminum plate and the finished product is scrapped, and the surface of the aluminum plate is blackened along with the increase of the standing time and the quality of the finished product is degraded. Particularly, when hard aluminum alloy is rolled, the water-soluble lubricating liquid is easy to cause serious water corrosion. The existence or report of the aluminum cold rolling water-soluble lubricating liquid capable of solving the water corrosion problem is not found in the literature or in the actual production of the aluminum cold rolling mill.
Therefore, it is an urgent need to solve the technical problem of the skilled person to prevent the white spots caused by the water corrosion of the rolled aluminum coil and the blackening of the whole plate surface caused by the water corrosion.
Disclosure of Invention
The technical problem solved by the embodiment of the invention is how to prevent the aluminum coil obtained by rolling from generating water corrosion.
To solve the above problems, an embodiment of the present invention provides a water-soluble lubricating fluid, including:
a water-soluble polymer;
the oxyacid of phosphorus is at least one of phosphoric acid, metaphosphoric acid, hypophosphorous acid and phosphorous acid;
an organic amine having the general formula (I):
the R is1Is one of H, alkyl, alkoxy or alkyl alcohol, R2Is one of H, alkyl, alkoxy or alkyl alcohol, R3Is one of H, alkyl, alkoxy or alkyl alcohol, and R is1、R2、R3The sum of the number of the carbon atoms is in the range of 4-16, and the organic amine is one or the combination of at least two of the substances satisfying the general formula (I).
Optionally, the oxyacid of phosphorus is phosphoric acid.
Optionally, the R is1、R2、R3Any two of which are methyl.
Optionally, the R is1、R2、R3The total number of the carbon atoms is 12-14.
Optionally, the R is1、R2、R3At least one of which comprises an ethylene oxide group.
Optionally, the chain members of the water-soluble polymer comprise one or a combination of two of ethylene oxide groups and propylene oxide groups;
in the oxyacid of phosphorus, the organic amine and the water-soluble polymer of the water-soluble lubricating fluid, the mass fraction range of the oxyacid of phosphorus is 0.1 wt% -3.0 wt%, the mass fraction range of the organic amine is 1.0 wt% -15.0 wt%, and the mass fraction range of the water-soluble polymer is 0.0 wt% -95.0 wt%.
Optionally, in the oxyacid of phosphorus, the organic amine, and the water-soluble polymer of the water-soluble lubricating fluid, the mass fraction of the oxyacid of phosphorus ranges from 0.2 wt% to 2.5 wt%, the mass fraction of the organic amine ranges from 4.0 wt% to 14.0 wt%, and the mass fraction of the water-soluble polymer ranges from 30.0 wt% to 90.0 wt%.
Optionally, in the oxyacid of phosphorus, the organic amine, and the water-soluble polymer of the water-soluble lubricating fluid, the mass fraction of the oxyacid of phosphorus ranges from 0.6 wt% to 2.0 wt%, the mass fraction of the organic amine ranges from 6.0 wt% to 12.0 wt%, and the mass fraction of the water-soluble polymer ranges from 40.0 wt% to 80.0 wt%.
Optionally, in the oxyacid of phosphorus, the organic amine, and the water-soluble polymer of the water-soluble lubricating fluid, the mass fraction of the oxyacid of phosphorus ranges from 1.0 wt% to 1.8 wt%, the mass fraction of the organic amine ranges from 8.0 wt% to 10.0 wt%, and the mass fraction of the water-soluble polymer ranges from 50.0 wt% to 70.0 wt%.
The embodiment of the invention also provides a processing method for cold rolling of aluminum, which comprises the step of applying the water-soluble lubricating fluid to an aluminum plate or an aluminum foil strip.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following advantages:
the embodiment of the invention provides a water-soluble lubricating liquid, which comprises a water-soluble polymer, oxyacids of phosphorus, and organic amine, wherein the oxyacids of the phosphorus are at least one of phosphoric acid, metaphosphoric acid, hypophosphorous acid and phosphorous acid, and the general formula of the organic amine is shown as (I):
the R is1Is one of H, alkyl, alkoxy or alkyl alcohol, R2Is one of H, alkyl, alkoxy or alkyl alcohol, R3Is one of H, alkyl, alkoxy or alkyl alcohol, and R is1、R2、R3The sum of the number of the carbon atoms is in the range of 4-16, and the organic amine is one or the combination of at least two of the substances satisfying the general formula (I). When the water-soluble lubricating liquid provided by the embodiment of the invention is used for rolling an aluminum plate, the aluminum coil obtained by rolling does not produce white corrosion spots. Therefore, the water-soluble lubricating liquid provided by the embodiment of the invention can reduce the influence of water corrosion white spots generated by rolling the aluminum plate and improve the yield of aluminum coils when the water-soluble lubricating liquid is used for rolling; on the other hand, the inventor also finds that the water-soluble lotion provided by the embodiment of the invention is adoptedThe phenomenon of surface blackening caused by water corrosion of an aluminum coil obtained by rolling an aluminum plate by using the synovial fluid is also well improved, so that the problem of surface blackening caused by water corrosion can be further improved by using the water-soluble lubricating fluid provided by the embodiment of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a photograph of the results of an aluminum plate obtained with a pure oil rolling oil in a water corrosion blackening experiment;
FIG. 2 is a photograph of the results obtained for the aluminum plate of comparative formulation 1 in a water etch blackening experiment;
FIG. 3 is a photograph showing the results of the aluminum plate obtained according to formulation 1 of the present invention in the water corrosion blackening test;
FIG. 4 is a photograph of an aluminum coil rolled in an actual production mill with a pure rolling oil;
FIG. 5 is a photograph of an aluminum coil rolled on an actual production mill in comparison to formulation 1;
FIG. 6 is a photograph of an aluminum coil rolled on a practical production mill according to formulation 1 of the present invention;
FIG. 7 is a photograph of an aluminum coil rolled on a practical production mill according to formulation 2 of the present invention;
FIG. 8 is a photograph of an aluminum coil rolled on an actual production mill according to formulation 3 of the present invention.
Detailed Description
As is clear from the background art, aluminum coils obtained by rolling with the conventional water-soluble lubricating liquid are prone to water corrosion problems, and water corrosion white spots are generated on the surface of aluminum materials.
In order to solve the above problems, embodiments of the present invention provide a water-soluble lubricating fluid, which includes a water-soluble polymer, and an oxyacid of phosphorus, wherein the oxyacid of phosphorus is phosphoric acid, metaphosphoric acid, hypophosphorous acid, phosphorous acidThe organic amine has a general formula shown as (I):
the R is1Is one of H, alkyl, alkoxy or alkyl alcohol, R2Is one of H, alkyl, alkoxy or alkyl alcohol, R3Is one of H, alkyl, alkoxy or alkyl alcohol, and R is1、R2、R3The sum of the number of the carbon atoms is in the range of 4-16, and the organic amine is one or the combination of at least two of the substances satisfying the general formula (I).
The water-soluble lubricating liquid provided by the embodiment of the invention is adopted to roll the aluminum plate on an actual production rolling mill, and the aluminum coil obtained by rolling does not produce water corrosion white spots. Therefore, the water-soluble lubricating liquid provided by the embodiment of the invention can greatly reduce or even completely eliminate the problem of aluminum plate rolling, which generates water corrosion white spots and is scrapped; on the other hand, the inventor also finds that the surface blackening phenomenon caused by water corrosion does not occur on the surface of the aluminum coil obtained by rolling the aluminum plate by using the water-soluble lubricating liquid provided by the embodiment of the invention, and therefore, the water-soluble lubricating liquid provided by the embodiment of the invention can greatly improve and even eliminate the surface blackening problem caused by water corrosion, thereby improving the yield of the aluminum coil when the aluminum coil is rolled by using the water-soluble lubricating liquid and enabling the aluminum coil to be more beautiful.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a water-soluble lubricating liquid, which comprises a water-soluble polymer, oxyacids of phosphorus, organic amine and at least one of phosphoric acid, metaphosphoric acid, hypophosphorous acid and phosphorous acid, wherein the general formula of the organic amine is shown as (I)：
The R is1Is one of H, alkyl, alkoxy or alkyl alcohol, R2Is one of H, alkyl, alkoxy or alkyl alcohol, R3Is one of H, alkyl, alkoxy or alkyl alcohol, and R is1、R2、R3The sum of the number of the carbon atoms is in the range of 4-16, and the organic amine is one or the combination of at least two of the substances satisfying the general formula (I).
It will be appreciated that the alkyl alcohol is a combination of an alkyl group and a hydroxyl group, such as-R-OH, where R is an alkyl group, and the alkoxy group is a combination of an alkyl group and an oxygen atom, such as R '-O-, where R' is an alkyl group.
The water-soluble lubricating fluid can also comprise lubricating additives such as phosphate ester and the like, and can also comprise functional additives such as antirust additives, antioxidant additives, pH adjusting additives and the like.
In actual use, the water-soluble lubricating fluid may be diluted by adding it to water so that the water-soluble lubricating fluid accounts for 10 wt% to 20 wt% of the total. Of course, if necessary, the solution can be diluted into other proportions or not.
In order to verify the effect of the water-soluble lubricating fluid provided by the embodiment of the invention, the inventor develops and carries out a water corrosion white spot experiment, a water corrosion blackening experiment and a water corrosion resistance degree experiment, and the method is described as follows.
Water corrosion white spot experiment: when the aluminum coil is rolled at a curled position after rolling, due to the fact that rolling liquid can remain on the aluminum surface, when the water corrosion resistance of the rolling liquid is insufficient, the phenomenon that white spots exist on the surface of the aluminum coil in the process of placing the aluminum coil can occur. Therefore, the phenomenon is simulated by adopting a standard corrosion test, the lamination corrosion test in a reference standard method (GB/T6144-2010) is tested, and the corrosion area (%) is taken as a key parameter of water corrosion white spot after a test piece is taken out. The rolling mill verifies that the obtained experimental result is consistent with the water corrosion white spot condition generated by rolling the aluminum coil by the actual rolling mill. It is considered that the water corrosion white spot test can reflect the actual formation of water corrosion white spots.
Water corrosion blackening experiment and water corrosion resistance degree experiment: the phenomenon of blackening of the aluminum plate caused by water corrosion means that when the aluminum plate strip is rolled and deformed and a new aluminum surface is formed, rolling liquid is lack of water corrosion resistance in a roll gap area, so that the whole plate surface of the aluminum plate strip at the outlet of a rolling mill is blackened, and is even blackened more and more in the placing process. Therefore, the lamination experiment is adopted to simulate the phenomenon that the new aluminum surface is blackened in the production and placing process, the lamination experiment in the method (GB/T6144-2010) of the reference standard is tested, and the corrosion area (%) of the aluminum surface is taken out as one of the parameters of the water corrosion blackening degree; similarly, in the experiment of the water corrosion resistance degree, the lamination corrosion test is adopted to simulate the blackening problem caused by the water corrosion, the method refers to the standard lamination corrosion test (SH/T0692), and the oxygen content of the test surface of the taken aluminum sheet is used as another parameter of the blackening degree caused by the water corrosion. The rolling mill verifies that the results of the obtained water corrosion blackening experiment and the results of the water corrosion resistance degree experiment are consistent with the actual conditions, and the water corrosion blackening experiment and the water corrosion resistance degree experiment can be considered to reflect the actual formation conditions of the water corrosion blackening.
Various exemplary formulations are provided in the examples of the present invention and are shown in Table I.
Watch 1
Wherein the comparative formulation 1 is a typical prior art formulation.
The EO-PO polymer is a polymer obtained by copolymerizing ethylene oxide and propylene oxide, the chain link of the EO-PO polymer comprises an ethylene oxide group (EO group) and a propylene oxide group (PO group), and the structural formula of the ethylene oxide group is-CH2-CH2-O-, the propylene oxide group (PO group) has the structural formula of-CH (CH)3)-CH2-O-. Of course, other polymers with water-solubilizing groups may be used.
The oxyacid of phosphorus may be at least one selected from phosphoric acid, metaphosphoric acid, hypophosphorous acid and phosphorous acid.
The number of carbon atoms of the C12-18 in the C12-18 phosphate represents that the phosphate has 12-18 carbon atoms, and the phosphate can be a pure substance meeting the requirement or a mixture of at least two substances meeting the requirement. The C12-18 phosphate ester has the main function of providing lubrication, but other substances which can provide lubrication can be selected.
The C6-C10 alcohol amine represents that the number of carbon atoms of the selected alcohol amine is 6-10, and the selected alcohol amine can be a pure substance meeting the requirement or a mixture of at least two substances meeting the requirement.
The C12-14 tertiary amine (containing 5EO group) represents that the number of carbon atoms of the selected tertiary amine is 12-14, and the tertiary amine contains ethylene oxide groups (EO group), and can be a pure substance meeting the requirement or a mixture of at least two substances meeting the requirement.
The C12-14 tertiary amine represents the tertiary amine selected, the number of carbon atoms of which is 12-14, the tertiary amine does not contain ethylene oxide groups (EO groups), and the tertiary amine can be a pure substance meeting the requirement or a mixture of at least two substances meeting the requirement.
The C8 amine represents the amine with 8 carbon atoms, which does not contain ethylene oxide group (EO group), and can be a pure substance meeting the requirement or a mixture of at least two substances meeting the requirement.
The cosolvent belongs to a functional additive and is used for dissolving each component, and the cosolvent can be one of ethers and alcohols, such as tripropylene glycol butyl ether, isooctanol polyoxyethylene polyoxypropylene ether, tripropylene glycol methyl ether and the like or a combination thereof.
The experimental results are shown in the second table.
Watch two
Please refer to fig. 1-3 for partial experimental results of the water corrosion blackening experiment, wherein fig. 1 is a photograph of the aluminum plate result obtained by pure oil rolling oil in the water corrosion blackening experiment; FIG. 2 is a photograph of the results obtained for the aluminum plate of comparative formulation 1 in a water etch blackening experiment; FIG. 3 is a photograph of the results obtained for aluminum panels of inventive formulation 1 in a water etch blackening experiment.
According to the experimental results, in the water corrosion white spot experiment, neither the formula 1 of the invention nor the formula 3 of the invention forms any corrosion on the surfaces of 1070, 3003 and 5052 aluminum plates, and the surface level of the rolled plate with pure oil is reached. Compared with the comparison formula 1 and the formula 2, the formula 1 and the formula 3 have better effect of preventing water corrosion and white spots. Through the experiment, the water-soluble lubricating liquid can effectively reduce water-corroded white spots under the combined action of phosphoric acid and organic amine. When the selected amine belongs to tertiary amine or comprises ethylene oxide groups, the formation of water corrosion white spots can be greatly reduced and even prevented. To further verify the correctness of the conclusion, the pure oil rolling oil, the comparative formula 1, the inventive formula 2 and the inventive formula 3 were actually verified on an industrial production rolling mill, respectively, and referring to fig. 4 to 8, fig. 4 is a photograph of an aluminum coil obtained by rolling the pure oil rolling oil, fig. 5 is a photograph of an aluminum plate strip obtained by rolling the comparative formula 1, fig. 6 is a photograph of an aluminum coil obtained by rolling the inventive formula 1, fig. 7 is a photograph of an aluminum coil obtained by rolling the inventive formula 2, and fig. 8 is a photograph of an aluminum coil obtained by rolling the inventive formula 3.
The comparison shows that the surfaces of aluminum coils rolled on an industrial rolling mill by the formulas 1 and 3 are completely free of water corrosion white spots, the aluminum coils reach the level of a rolled plate surface of the traditional pure oil rolling oil, large white water corrosion spots exist at the edges and the middle part of the plate after the aluminum coils are rolled by the formula 1, a small amount of white spots also exist at the edge part of the formula 2, but compared with the formula 1, the improvement effect is obviously improved, and the result is consistent with the result of a simulation experiment.
In a water corrosion blackening experiment, compared with a comparison formula 1, the corrosion areas of the formula 1 and the formula 2 of the invention on the surface of an aluminum plate are within 10%, and the formula 1 of the invention even reaches the level of pure oil rolling oil. The inventive formulation 2 was also greatly enhanced over the comparative formulation 1, resulting in a reduction of the corrosion area from > 90% to at most 10%. Referring to fig. 1-3, it can also be seen that the aluminum plate obtained according to the formula 1 of the present invention has a smooth surface without any blackening caused by water corrosion, while the aluminum plate obtained according to the comparative formula 1 has a severely blackened surface.
The inventor also carries out element content analysis on the surfaces of the aluminum coils actually rolled by the pure oil rolling oil, the comparison formula 1 and the formula 1 of the invention, the obtained results are shown in the table III, and the data shows that the oxygen content of the surface of the aluminum plate rolled by the comparison formula 1 exceeds 30 percent, which is considered to be the oxygen content increase caused by water corrosion, and shows that the plate surface blackening of the comparison formula 1 is closely related to the water corrosion. The oxygen content of the surface of the aluminum plate rolled by the formula 1 is equivalent to that of the surface of the aluminum plate rolled by the pure oil rolling oil.
Meanwhile, in a water corrosion resistance degree experiment developed in a laboratory, the content of alumina formed on the surface of an aluminum plate by the formula 1 is similar to that of alumina formed on the surface of the aluminum plate by pure oil rolling oil, and is far less than that of the alumina formed on the surface of the aluminum plate by the comparative formula 1. This also proves the correctness of the on-site rolling situation.
Watch III
The comparison formula proves that under the combined action of oxyacid of phosphorus and organic amine in the water-soluble lubricating liquid, the water corrosion blackening can be effectively reduced. When the selected amine belongs to tertiary amine or comprises ethylene oxide groups, the blackening phenomenon of the surface of the aluminum plate caused by water corrosion can be greatly reduced and even prevented.
The comparison formula proves that under the combined action of oxyacid of phosphorus and organic amine in the water-soluble lubricating liquid, the white spots generated by water corrosion and the blackening phenomenon generated by water corrosion can be effectively reduced. When the selected amines belong to tertiary amines (formula 1 and formula 2 of the invention, namely when the N atom in the amines is connected with two methyl groups) or comprise ethylene oxide groups (formula 1 of the invention), the blackening phenomenon of the surface of the aluminum plate caused by water corrosion can be greatly reduced and even prevented. The amine group including the ethylene oxide group is preferably used in combination with the amine group not including the ethylene oxide group, and the water corrosion prevention effect is also excellent (i.e., the present formula 3).
The inventor not only uses EO-PO polymer with the mass percentage of 10-15 wt% (shown in the table I) to carry out the test in the formula of the invention, but also uses EO-PO polymer with other proportions (0-10 wt% and 20-95 wt%) to carry out the test, and also obtains similar results, namely, the water-soluble lubricating fluid provided by the embodiment of the invention can effectively reduce the phenomena of white spots and black spots generated by water corrosion mainly under the combined action of the oxyacid of phosphorus and the organic amine.
The inventor not only utilizes amines with the total number of carbon atoms of 12-14 to carry out tests, but also utilizes other amines with the total number of carbon atoms of 4-16 to carry out tests, and obtains similar results, namely under the combined action of oxyacid of phosphorus and organic amine, the water-soluble lubricating fluid provided by the embodiment of the invention can effectively reduce white spots and blackening phenomena caused by water corrosion.
Therefore, the water-soluble lubricating liquid provided by the embodiment of the invention is used for rolling the aluminum plate, and the aluminum coil obtained by rolling does not produce white corrosion spots. Therefore, the water-soluble lubricating liquid provided by the embodiment of the invention can reduce the influence of water corrosion white spots generated by rolling of the aluminum plate. On the other hand, the phenomenon of blackening of the surface of the aluminum coil obtained by rolling the aluminum plate by using the water-soluble lubricating liquid provided by the embodiment of the invention is also well improved, so that the problem of blackening of the surface of the aluminum plate produced by rolling the aluminum plate can be further improved by using the water-soluble lubricating liquid provided by the embodiment of the invention. The method improves the yield of the aluminum coil rolled by using the water-soluble lubricating liquid and makes the aluminum coil more beautiful.
In an experiment, in the oxyacid of phosphorus, the organic amine and the water-soluble polymer of the water-soluble lubricating liquid, when the mass fraction of the oxyacid of phosphorus is in the range of 0.1 wt% -3.0 wt%, the mass fraction of the organic amine is in the range of 3.0 wt% -15.0 wt% and the mass fraction of the water-soluble polymer is in the range of 0.0 wt% -95.0 wt%, the water-soluble lubricating liquid can reduce the water corrosion of an aluminum coil.
When the mass fraction range of the oxyacid of phosphorus in the water-soluble lubricating liquid, the mass fraction range of the organic amine in the water-soluble polymer, and the mass fraction range of the oxyacid of phosphorus in the water-soluble lubricating liquid is 0.2 wt% -2.5 wt%, the mass fraction range of the organic amine in the water-soluble polymer is 4.0 wt% -14.0 wt%, the mass fraction range of the water-soluble polymer in the water-soluble lubricating liquid is 10.0 wt% -90.0 wt%, the water corrosion effect of the aluminum coil by the water-soluble lubricating liquid is slightly excellent.
In the oxyacid of phosphorus, the organic amine and the water-soluble polymer in the water-soluble lubricating liquid, when the mass fraction range of the oxyacid of phosphorus is 0.6 wt% -2.0 wt%, the mass fraction range of the organic amine is 6.0 wt% -12.0 wt% and the mass fraction range of the water-soluble polymer is 10.0 wt% -80.0 wt%, the water-soluble lubricating liquid has a better effect of reducing water corrosion to an aluminum coil.
In the oxyacid of phosphorus, the organic amine and the water-soluble polymer in the water-soluble lubricating liquid, when the mass fraction range of the oxyacid of phosphorus is 1.0 wt% -1.8 wt%, the mass fraction range of the organic amine is 8.0 wt% -10.0 wt% and the mass fraction range of the water-soluble polymer is 50.0 wt% -70.0 wt%, the water-soluble lubricating liquid has the best effect of reducing the water corrosion of the aluminum coil.
The embodiment of the invention also provides a processing method for cold rolling of aluminum, which comprises the step of applying the water-soluble lubricating fluid to an aluminum plate or an aluminum foil strip.
Therefore, the aluminum coil obtained by rolling the aluminum plate by the processing method for cold rolling the aluminum provided by the embodiment of the invention does not generate white corrosion spots. Therefore, the processing method for cold rolling of the aluminum provided by the embodiment of the invention can reduce the influence of water corrosion white spots generated by rolling of the aluminum plate; on the other hand, the surface blackening phenomenon of the aluminum coil obtained by rolling the aluminum plate by using the processing method for cold rolling the aluminum provided by the embodiment of the invention is also well improved, so that the problem of surface blackening generated by rolling the aluminum plate can be further improved by using the processing method for cold rolling the aluminum provided by the embodiment of the invention, the yield of the aluminum coil is improved when the aluminum coil is rolled by using the water-soluble lubricating liquid, and the aluminum coil is more attractive.
Although the embodiments of the present invention are disclosed above, the embodiments of the present invention are not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present embodiments, and it is intended that the scope of the present embodiments be defined by the appended claims.
Claims (10)
1. A water-soluble lubricating fluid, comprising:
a water-soluble polymer;
the oxyacid of phosphorus is at least one of phosphoric acid, metaphosphoric acid, hypophosphorous acid and phosphorous acid;
an organic amine having the general formula (I):
the R is1Is one of H, alkyl, alkoxy or alkyl alcohol, R2Is one of H, alkyl, alkoxy or alkyl alcohol, R3Is one of H, alkyl, alkoxy or alkyl alcohol，The R is1、R2、R3The sum of the number of the carbon atoms is in the range of 4-16, and the organic amine is one or the combination of at least two of the substances satisfying the general formula (I).
2. The water-soluble lubricating fluid of claim 1, wherein the oxyacid of phosphorus is phosphoric acid.
3. As claimed inThe water-soluble lubricating liquid according to claim 1, wherein R is1、R2、R3Any two of which are methyl.
4. The water-soluble lubricating fluid of claim 1, wherein R is1、R2、R3The total number of the carbon atoms is 12-14.
5. The water-soluble lubricating fluid of claim 1, wherein R is1、R2、R3At least one of which comprises an ethylene oxide group.
6. The water-soluble lubricating fluid according to any one of claims 1-5, wherein the segments of the water-soluble polymer comprise one or a combination of two of ethylene oxide groups and propylene oxide groups;
in the oxyacid of phosphorus, the organic amine and the water-soluble polymer of the water-soluble lubricating fluid, the mass fraction range of the oxyacid of phosphorus is 0.1 wt% -3.0 wt%, the mass fraction range of the organic amine is 1.0 wt% -15.0 wt%, and the mass fraction range of the water-soluble polymer is 0.0 wt% -95.0 wt%.
7. The water-soluble lubricating fluid according to claim 6, wherein in the oxyacid of phosphorus, the organic amine, and the water-soluble polymer of the water-soluble lubricating fluid, the mass fraction of the oxyacid of phosphorus ranges from 0.2 wt% to 2.5 wt%, the mass fraction of the organic amine ranges from 4.0 wt% to 14.0 wt%, and the mass fraction of the water-soluble polymer ranges from 30.0 wt% to 90.0 wt%.
8. The water-soluble lubricating fluid according to claim 7, wherein in the oxyacid of phosphorus, the organic amine, and the water-soluble polymer of the water-soluble lubricating fluid, the mass fraction of the oxyacid of phosphorus ranges from 0.6 wt% to 2.0 wt%, the mass fraction of the organic amine ranges from 6.0 wt% to 12.0 wt%, and the mass fraction of the water-soluble polymer ranges from 40.0 wt% to 80.0 wt%.
9. The water-soluble lubricating fluid according to claim 8, wherein in the oxyacid of phosphorus, the organic amine, and the water-soluble polymer of the water-soluble lubricating fluid, the mass fraction of the oxyacid of phosphorus ranges from 1.0 wt% to 1.8 wt%, the mass fraction of the organic amine ranges from 8.0 wt% to 10.0 wt%, and the mass fraction of the water-soluble polymer ranges from 50.0 wt% to 70.0 wt%.
10. A method of cold rolling aluminum, comprising applying the water-soluble lubricating fluid of any one of claims 1 to 9 to an aluminum plate or an aluminum foil strip.
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