CN1085709C - Inorganic coating - Google Patents
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- CN1085709C CN1085709C CN97107671A CN97107671A CN1085709C CN 1085709 C CN1085709 C CN 1085709C CN 97107671 A CN97107671 A CN 97107671A CN 97107671 A CN97107671 A CN 97107671A CN 1085709 C CN1085709 C CN 1085709C
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Abstract
The present invention relates to paint composed of an adhesive agent using acid phosphate as a main component, and inorganic solid particles, which can be automatically dried or solidified at a room temperature. A coating composed of an adhesive agent and zinc powder or aluminum powder (or aluminum-zinc alloy powder) is a sacrificial anode steel coating, and the coating has high heat resistance, high electric conductivity and cathodic protection function. The paint can be directly coated on the surfaces of steel materials which are not blasted, and a slight corrosion film or an oxidation film on the surfaces of the steel materials is converted into the components of the coating. The coating technology is convenient, and the paint is used for protecting large steel members.
Description
The invention belongs to a kind of inorganic paint, specifically, it belongs to a kind of and is made up of inoganic solids particulate and superphosphate, can at room temperature dry voluntarily and hardened coating.It has premium propertiess such as protection against corrosion, heat-resisting, conduction, and extensive applicability is arranged.
In modern industrial society, metallic corrosion is serious problems, the large-scale steel and iron member that in abominable corrosive environment, uses particularly, and the method for lacquering that adopts can not satisfy requirement of shelter usually, must take more effective measures.
The cathode protection technology drought be successfully used under water or underground wet environment in the protection against corrosion field of the large-scale steel and iron member that uses; but be in position waterborne or the discontinuous position of corrosive medium for large-scale steel part; common galvanic protection is not all prove effective, and it is effective means that this occasion adopts the sacrificing positive pole coating protection that also plays the galvanic protection effect.Galvanizing (aluminium or aluminium zinc) is an example of sacrificing positive pole coating.Though it prevents that the effect of steel corrosion is fine, but it is bigger to implement difficulty for large-scale steel and iron member, it must carry out well-designed to whole member, because can only in advance each component be carried out galvanizing (aluminium or aluminium zinc) respectively, and then assembles.Behind the member process galvanizing (aluminium or aluminium zinc).Can not weld again or other processing, otherwise coating suffers that breakage is difficult to repair.Hot spray painted zinc (or aluminium) is another example of sacrificing positive pole coating.Though it can carry out integral spray to the member that assembles, it is bigger to implement difficulty for large-scale steel and iron member.Therefore people place hope on can be at room temperature solidified inorganic zinc-rich coating voluntarily.English Patent 958787 and United States Patent (USP) 4219358 are two examples of this coating.Inorganic zinc-rich coating has the negative potential of zinc; therefore it also is a kind of sacrificing positive pole coating; but the actual effect that is used for large-scale steel and iron member is unsatisfactory; it is as follows to trace it to its cause: first reason is that the resistance of coating is too big; thereby the galvanic protection function can not give full play to, and particularly all the more so when the resistance of corrosive medium is also big [body resistivity of inorganic zinc-rich coating is 10
4～10
7Ω m, and the body resistivity of galvanizing (aluminium or aluminium zinc) is less than 0.1 Ω m]; Second reason is to require before inorganic zinc-rich coating applies steel and iron member is carried out strict blast alligatoring and surface-conditioning, comprise strict oil removing and rust cleaning, in fact be difficult to accomplish these for large-scale steel and iron member, for example the blast of the sunk areas such as groove gap of large-scale steel and iron member is difficult for reaching requirement, rusty stain is difficult to thoroughly remove, existing inorganic zinc-rich coating is difficult for cementing in these zones, can not suppress the development of these regional corrosions effectively, finally cause coating also bubbling come off; What the 3rd reason was that inorganic zinc-rich coating adopts is silicate bond, and its toughness is relatively poor, and coating is more crisp, has been coated with easy to crack peeling off thick, therefore can only be coated with thinlyyer, thereby also just more shorten the protection life-span.Thoroughly rust cleaning is than this situation of difficulty at large-scale steel and iron member, and a kind of coating that is called primer for rusty surface arises at the historic moment, and Chinese patent CN87102047 and English Patent GB2160877 are two examples of this coating.The iron rust react with of this coating energy and steel surface (dissolving rust) therefore can be with the rust coating, and the operation of removing the blast rust cleaning from simplifies being coated with the front surface cleaning operation greatly.But this coating does not possess the galvanic protection function, and anti-corrosion capability is not high, therefore can not adapt to the needs of the long-term protection of large-scale steel and iron member.
United States Patent (USP) 3248251 discloses a kind of inorganic aluminum coating (being designated hereinafter simply as inorganic aluminum coating) by Alan (Allen) invention, it is+2 and the coating formed of phosphoric acid salt, chromic salt and the aluminium powder of+3 valency metals, be fabulous inorganic (sacrifice) anode coating of a kind of performance, it is widely used in the protection of the various iron and steel parts of aircraft engine.It has fabulous electroconductibility, and the body resistivity of coating is less than 1 Ω m, is ten thousand of the said inorganic zinc-rich coating body resistivity in front/to 1/10000000th.Its adhesive power, toughness, thermotolerance, oxidation-resistance, oil-proofness and anti-corrosion capability all beat by miles above-mentioned inorganic zinc-rich coating and other erosion shields.Though its same inorganic coating that belongs to zinc-rich coating, the former binding agent are phosphoric acid salt and the latter's binding agent is a silicate, this is the former the performance major cause more superior than the latter.As everyone knows; the bonderizing of iron and steel is a kind of process for treating surface of steel part; steel surface and phosphoric acid salt generation chemical reaction and the phosphoric acid molysite protective membrane that forms; it is except shielding; main function is to improve the bonding force of base material and paint; phosphoric acid salt in the above-mentioned inorganic aluminum coating also can play chemically combined effect with iron and steel, the then this effect of unable to get up of silicate zinc-rich coating., so the cohesive force of phosphoric acid salt inorganic coating surpasses the silicate inorganic coating.
The main drawback of above-mentioned inorganic aluminum coating is its dry solidification voluntarily at room temperature unlike inorganic zinc-rich coating; it must be heated to 650 ability and solidify; coating after the curing also need be carried out aftertreatment (spray granulated glass sphere polishing or reheat to 1000) and just conducted electricity, and just possesses the galvanic protection function.Carrying out such heating and aftertreatment for large-scale steel and iron member is unusual difficulty, thereby has limited its use range.
Main purpose of the present invention will be created a kind of like this coating component and paint-on technique exactly; it has performances such as the conductivity approaching with above-mentioned inorganic aluminum coating, galvanic protection function, corrosion resistance and heat-resisting, oil resistant; can at room temperature voluntarily dry also solidify the same with existing inorganic zinc-rich coating; can not need the harsh pre-treatment that is coated with like that by image-tape rust priming paint again; can dissolve the slight iron rust of steel surface, change it the component of coating into.Therefore coating of the present invention is the inorganic coating of a new generation that above-mentioned three kinds of existing coatings advantage is separately combined together.Other purposes of the present invention and advantage are discussed later, and are described in some use-cases.
Observe the chemical reaction of the inorganic aluminum coating solidification process of Alan's invention, can find that the original contained sexavalence chromic salts (being chromic salt) of coating is almost all reduced by the aluminium powder in the coating, changes chromic salt in the process of being heating and curing.Can express with following ionic equation:
Redox result has increased a large amount of metallic cation C in the coating
r 3+And Al
3+, while H
+The a large amount of minimizing, coating changes neutrality into by acidity.Tart weakens, make the original contained tart dihydrogen phosphate soluble in water (being primary phosphate) of coating change water-fast neutral phosphoric acid normal salt (being tertiary phosphate) into, in this simultaneously sexavalence chromic salts soluble in water also change water-fast chromic salt into, coating is with regard to completely solidified like this.Though also there is the chemical transformation of the polyphosphoric acid salt that simple phosphate transfection thickens in heat-processed, their chemical reaction is also approximate with orthophosphoric acid salt, remains by soluble acid-salt and changes insoluble neutral salt into.Above-mentioned redox reaction is to finish under the condition of heating, and at room temperature because the effect of sexavalence chromic salts makes aluminium powder be in passive state, thereby coating also is in steady state, can not solidify.It is contemplated that, if in above-mentioned coating, cancel chromic salt, the acid aqueous phosphatic of this+2 and+3 valency metals, can be at room temperature and aluminium powder (or zinc powder) react, form water-fast neutral compound.Now be exemplified below with the superphosphate of divalent metal (representing) and the reaction of aluminium powder with M:
Difficulty is the difficult dried control of this chemical reaction, this acidic solution does not have passivation to aluminium (or zinc), thereby the reaction of solution and aluminium (or zinc) is very fast, often at the coating allocation process or just be coated on the base material aqueous solvent as yet before the volatilization, chemical reaction is finished, make coating become the water-fast waste residue of a pile, completely lose adhesive power.
Have now found that, if with the phosphate content in the superphosphate and+2 ,+ratio of 3 valence metal ion content remains in the suitable scope, this superphosphate can be scattered in the liquid alcohol as solvent, or the mixed solution of liquid alcohol and water, or the mixed solution of liquid alcohol, liquid ketone and water, form a kind of glue of viscosity.Mix the coating of forming with it as binding agent and aluminium powder, zinc powder or other pressed powder, in material-storage jar, can in for some time, keep than stable status, the shelf life (being called the canning life-span again) that is called coating during this period of time, during this period of time can finish applying operation.The existence of liquid alcohol can delay the speed that superphosphate and aluminium (or zinc) powder or other powder produce chemical reaction, and the effect of liquid ketone mainly is the evaporation rate of accelerated solvent.After coating was coated on the base material, along with the volatilization of solvent, the chemical reaction in the coating between each component quickened gradually, the also dry thereupon and sclerosis of coating.Regulate the content of each component in the binding agent, just can effectively control doing certainly and the speed of sclerosis (or curing) and the shelf life of coating of coating at room temperature.
In above-mentioned binding agent, phosphate radical and+2, the mole number ratio of+3 valence metal ions is 1.4～9: select in 1 scope, phosphate content and+2, when the ratio of+3 valence metal ion content is big, the acidity of coating is bigger, ratio hour, the acidity of coating also a little less than, the steel substrate that rust is arranged for the surface, preferably be coated with the acid high coating of one deck earlier, for example use phosphate radical and+2, the mole number ratio of+3 valence metal ions is the coating of 9: 1 (binder formula four), the effect that this coating dissolving transforms iron rust is stronger, after treating this layer coating drying, apply acid moderate coating again and (for example use the binding agent of prescription one, wherein phosphate radical and+2, the mole number ratio of+3 valence metal ions is 5.88: 1).Should adopt acid more weak binding agent to prepare coating for passive solia particle.Need the coated non-metallic base material or apply passive metal base also should adopt acid low coating (for example with the binding agent of prescription five, wherein phosphate radical and+2 ,+the mole number ratio of 3 valence metal ions is 1.4: 1).Should adopt anhydrous or moisture low liquid alcohol (or moisture low liquid alcohol and the mixed solution of liquid ketone) for the stronger binding agent of acidity.Can prolong the shelf life of coating like this.Acid more weak binding agent, the speed of response of it and aluminium (or zinc) powder or other powder is lower, in this case, both can adopt liquid alcohol, and also can adopt aqueous solution conduct+2 of the nonionogenic tenside that contains a small amount of alcohol and the dispersion agent of+3 valency metal phosphates to prepare coating.The effect of nonionogenic tenside is wettability and the adhesivity that improves the dispersion effect of phosphoric acid salt in solvent and improve coating.Wherein polyoxyethylene aliphatic alcohol ether is the nonionogenic tenside that is suitable for.Shelf life and raising anticorrosion ability in order to prolong coating can also add metal inhibitor in coating, its consumption is less than 1
Mol/ L for example adds hexavalent chromium compound, as chromic anhydride, chromic acid, chromic salt or dichromate.
In the binding agent+2 and+3 valence metal ions mainly be metal ions such as chromium, magnesium, zinc, calcium, strontium, aluminium, iron and manganese, chromium wherein is selected from+3 valency chromium ions or obtain+3 valency chromium ions with reductive agent reduction+6 valency chromium in phosphoric acid solution.Liquid alcohol in the binding agent is selected from ethanol, methyl alcohol, n-propyl alcohol, Virahol, propyl carbinol, isopropylcarbinol, Pentyl alcohol, primary isoamyl alcohol and liquid polyol etc., and their mixture.Liquid ketone in the binding agent is selected from acetone, butanone, pimelinketone etc. and their mixture.The content of the solvent in the binding agent can change according to different needs, ultrafine solids particulate very low for density and that particle diameter is very little should adopt rarer binding agent to come prepared paint, at this moment solvent sometimes can be up to 95% of binder content, in order to adapt to some special requirement, when for example doing bonding use, can only add a small amount of solvent (for example 5% solvent), for the ease of transportation and storage, also solubilizing agent is not added solvent before use again, so the content range broad of each component in the binding agent.Phosphate radical [(PO in the binding agent
4)
3-] content be 0.5～10
Mol/ L ,+2 and the total amount of+3 valence metal ions be 0.056～6.2
Mol/ L, the content of solvent is 5～95%, and in solvent, the content of liquid alcohol is non-vanishing, and the content of liquid ketone is not more than 40%, and the content of nonionogenic tenside is not more than 2%, and all the other are water.
Solia particle in the coating is a magnesium for corrosion-resistant coating, zinc, metal-powder such as aluminium or be the powdered alloy of base and zinc powder or the Zinc alloy powder of crossing through Passivation Treatment with these metals, zinc covering aluminium powder and zincizing aluminium powder, for conductive coating is Graphite Powder 99, silver or alloy for dental amalgam, copper or copper alloy powder, zinc or Zinc alloy powder and other powder that can conduct electricity, for solid lubricant coating is graphite, boron nitride, molybdenumdisulphide, tungsten disulfide, talcum powder, plumbous oxide and other powdered lubricant end are refractory oxide for refractory coating, refractory nitride, refractory carbides, refractory silicide and other heat-resisting powder.Can also add oxide compound, oxyhydroxide or the phosphatic ultrafine powder of some diameters in the coating, in order to the viscosity of adjusting coating with impel coating curing less than metals such as 1 micron zinc, aluminium, magnesium.In order to improve the coating corrosion-resistant life, can also in coating, add inhibiter, for example strontium yellow, zinc chromate or lead chromate etc., the sacrifice loss that is used for slowing down aluminium, zinc, magnesium and alloy thereof.The all solids particulate should be able to pass through 100 eye mesh screens, preferably by 325 eye mesh screens.The consumption of solia particle is decided on different purposes, the solia particle amount that every liter of binding agent need add in 10～2000 gram scopes better, 300～1000 grams preferably.As the less solia particle of bonding time spent employing, for example every liter of binding agent only adds 10 gram solia particles.
After the oxide compound of metal (or alloy) powder such as the zinc in the solia particle, aluminium, magnesium and these metals, hydroxide powder and the adhesive gelatin reaction, make that the tart primary phosphate changes two generation phosphoric acid salt (equation 2.) in the glue, and then change complete water-fast tertiary phosphate (equation 3.) into.The transformation of the first step is carried out comparatively fast, and second step changed slower.In order to quicken the solidification process of coating, after the coating drying, also can be coated with the basic solution (short lime set) of one deck pH value 8～14 again on its surface, accelerate two generation phosphate transfection turn to the speed of tertiary phosphate, impel the coating completely solidified.Should short lime set be selected from the aqueous solution of alkalescence, alcoholic solution, other basic solution and their mixture of alkalescence.Also can adopt alkali lye and soluble chromatedsolution blended basic solution, this solution is coated on the coating and applies the aqueous solution that one deck is selected from soluble strontium salt, soluble zinc salt and soluble lead salt after drying again, thereby forms the chromic salt precipitation of indissoluble in the hole of coating.Can be after this coating completely solidified in the various organic or inorganic coatings of its surface-coated to adapt to different needs.
Discuss technique effect of the present invention below in conjunction with coating processes.At first an advantage is that coating coating processes of the present invention is easy, thereby it has the utmost point scope of application widely.Owing to this coating can dissolve slight iron rust or oxide film and micro-greasy dirt and moisture content, therefore allow to exempt the preceding blast of coating and handle base material, add that coating can be at room temperature from doing and curing, this has just simplified coating processes greatly.This coating adopts the method for brush or spray to apply; determine the number of plies of coating and the thickness of coating according to actual needs; do not exist and resemble the phenomenon that has been coated with thick the existing silicate zinc-rich coating can cracking to come off; it can apply repeatedly according to actual needs fully and obtain very thick coating, thereby obtains the higher galvanic protection life-span.Adopt the zinc powder coatings formulated to apply the back and put several minutes coatings with regard to dry hardening in the air of room temperature, coating had just been solidified in about 2 hours.In order to accelerate or to guarantee the coating completely solidified, also can after coating applies 1～2 hour, be coated with the short lime set of one deck at coatingsurface again, again through coating after 10～20 minutes with regard to completely solidified.Spelter coating has good electrical conductivity through after the self-vulcanizing.The aluminum coating curing speed is slower, applies dry hardening in about 1～2 hour under the room temperature of back, applies the short lime set of one deck more again after about 20 hours, and then through 20～30 minutes coatings with regard to completely solidified.In order to accelerate the curing speed of aluminum coating, the aluminum coating after the dry hardening can be heated to 400-650 °F rapidly, several minutes undercoat with regard to completely solidified.Because there is the oxide film of one deck densification on the aluminium powder surface, thereby the aluminum coating after solidifying as stated above is still non-conductive, can adopt various thermals source that coating is heated rapidly to fusing point near aluminium, can make the aluminum coating conduction in the several seconds.If adopt aluminium zinc alloy powder, zinc covering aluminium powder or zincizing aluminium powder to replace pure aluminium powder, just possess electroconductibility after can making the coating self-vulcanizing, and have the advantage of aluminum coating and spelter coating concurrently.Coating after the curing not only is insoluble to cold water and also is insoluble to boiling water, and anti-various organic medium long period of soaking, can swelling or rotten.This coating also has very high thermotolerance (aluminum coating thermotolerance for example of the present invention reaches 1100), oxidation-resistance and aging not, and these all are that organic coating can't be compared.The body resistivity of aluminum coating of the present invention and spelter coating has only 1 Ω m, is ten thousand of existing inorganic zinc-rich coating body resistivity/to 1/10000000th, because the high conductivity and the negative potential of coating, thereby obtain fabulous galvanic protection function.
Introduce the performance measured result of spelter coating of the present invention and aluminum coating below:
(1) with reference to existing inorganic aluminum coating technical qualification, spelter coating of the present invention and aluminum coating are carried out the performance investigation, except the thermotolerance of spelter coating lower slightly (because of the fusing point of zinc is lower than aluminium), all other performances all meet or exceed the technical indicator of existing inorganic aluminum coating, see following table for details:
Investigate this coating by existing aluminum coating technological standard
(2) contrast is investigated in the practicality in the industrial atmosphere environment of spelter coating of the present invention and existing inorganic (silicate) zinc-rich coating:
| Test event | Existing inorganic aluminum coating technical indicator | Coating test result of the present invention | |
| Spelter coating | Aluminum coating | ||
| Adhesive power | Crooked 90 ° of coatings are not loose or peel off | Qualified | Qualified |
| Thermotolerance | 700 °F 23 hours+1075 °F 4 hours, coating is not broken or is bubbled | 700 23 hours+780 4 hours coatings are intact | 700 °F 23 hours+1075 °F 4 hours qualified |
| Hot water resistance | Boiling water boil do not split in 10 minutes non-foaming, the dissolving of no component, adhesive power is still qualified | Boiling water boil 60 minutes qualified | Boiling water boil 60 minutes qualified |
| Fuel resistance | Fuel oil soaked 4 hours, and adhesive power is still qualified | Soak 1000 hours qualified | Soak 1000 hours qualified |
| Heat-resisting oiliness | 400 deep fats 8 hours do not peel off non-foaming | Qualified | Qualified |
| Erosion resistance | Coating is carved along the test piece diagonal lines and is broken " X " shape, and the matrix metal corrosion does not appear in spray salt fog 100 hours | 1000 hours qualified | 1000 hours qualified |
Article two, the hot rolling medium carbon steel band of 70 * 5 * 0.3cm, the original slight corrosion in surface, wherein one applies spelter coating of the present invention, another coating inorganic silicate zinc-rich coating.The thickness of two kinds of coatings all is about 60 μ m, in being 80% industrial city atmospheric environment, annual relative humidity deposited three and half, many places iron rust and coating bubbling have appearred in the steel band that is coated with the silicate zinc-rich coating, and the steel band that is coated with spelter coating of the present invention is rustless, and coating is as excellent as before.
Coating of the present invention not only can be made corrosion-resistant coating, also can replace above-mentioned zinc powder or aluminium powder with other pressed powder by different needs, makes the coating of other specific function.For example adopt binding agent of the present invention, blending graphite, molybdenumdisulphide, boron nitride or other lubricated powder can be made high temperature lubricating coating; Blending silver powder, graphite, copper powder, zinc powder or other conductive powder can be made conductive coating; Blending refractory oxide powder or other heat-resisting powder can be made refractory coating.The common feature of these coatings is that low-temperature curing high temperature uses, and not only can be coated on the metal, but also can be coated on the non-metallic substrate, as be coated on plastics, glass or the pottery, so the present invention has purposes very widely.
Introduce some embodiments of the present invention below, they are some typical case's representatives, do not comprise full content of the present invention, therefore should not be construed as limitation of the present invention.
(1) preparation of binding agent
Prescription one
Biphosphate chromium [Cr (H
2PO
4)
3] 0.15mol
Phosphoric acid (H
3PO
4) 0.55mol
Magnesium oxide (MgO) 0.02mol
Water (H
2O) 30g
After finishing, dissolving adds ethanol (C again
2H
5O) to 1L
Prescription two
Aluminum phosphate (AlPO
4) 0.26mol
Primary magnesium phosphate [Mg (H
2PO
4)
23H
2O] 0.04mol
Phosphoric acid (H
3PO
4) 0.66mol
Zinc oxide (ZnO) 0.03mol
Water (H
2O) 11g
Ethanol (C
2H
5OH) to 1L
Prescription three
Phosphoric acid (H
3PO)
42.3mol
Aluminium hydroxide [Al (OH)
3] 1.2mol
Magnesium oxide (MgO) 0.05mol
Zinc oxide (ZnO) 0.2mol
Nonionogenic tenside [RO (CH
2CH
2O-)
n-H] 0.2g
Water (H
2O) to 1L
Prescription four
Biphosphate chromium [Cr (H
2PO
4)
3] 0.15mol
Phosphoric acid (H
3PO
4) 1.08mol
Magnesium oxide (MgO) 0.02mol
Water (H
2O) 30g
After finishing, dissolving adds ethanol (C again
2H
3OH) to 1L
Prescription five
Phosphoric acid (H
3PO)
42mol
Aluminium hydroxide [Al (OH)
3] 1.2mol
Magnesium oxide (MgO) 0.03mol
Zinc oxide (ZnO) 0.2mol
Nonionogenic tenside [RO (CH
2CH
2O-)
n-H] 0.2g
Water (H
2O) to 1L
(2) preparation of short lime set
Prescription one
Quadrol (H
2NCH
2CH
2NH
2) 10g
Water (H
2O) 20g
Industrial alcohol 70g
Prescription two
A liquid B liquid
Chromic anhydride (CrO
3) 10g strontium nitrate [Sr (NO
3)
2] 40g
Sodium hydroxide (NaOH) 10g water (H
2O) 60g
Water (H
2O) 80g
Earlier on coating, be coated with A liquid, be coated with B liquid after drying again.Prescription two not only plays the setting accelerator effect, but also can fill the strontium yellow precipitation in the hole of coating, thereby delays the sacrifice loss of zinc or aluminium.Strontium nitrate in the B liquid can be used zinc nitrate [Zn (NO
3)
2] or lead nitrate [Pb (NO
3)
2] replace, formation zinc chromate or precipitation of lead chromate play a part same in coating porosity.
Prescription three
Yellow soda ash (Na
2CO
3) 15g
Water (H
2O) to 100ml
Prescription four
Saturated potassium carbonate (K
2CO
3) aqueous solution
The various alkaline liquids of other various pH values in 8～14 scopes except above four prescriptions comprise that the aqueous solution, alcoholic solution, other basic solution and their mixed solution all can be used as short lime set and use.
(3) implementation example of applying coating
Embodiment one
Binding agent (by prescription one) 1L
Zinc powder (particle diameter 5～10 μ m) 900g
Be coated in 5 carbon steel test pieces of light rust about 45～55 μ m of coat-thickness after stirring evenly.Coating is placed after 2 hours in the air of room temperature, applies the short lime set of one deck again, wipes raffinate after drying in the air 20 minutes, and recording body resistivity is 0.6～1 Ω m.Get 2 test pieces and boiled in boiling water one hour, coating is excellent.Its excess-three sheet is drawn " X " with sharp device and is exposed to matrix steel on coating, place the salt fog cabinet of 5%Nacl to keep 95 °F, the no iron rust appearance through 1000 hours.
Embodiment two
Binding agent (by prescription two) 1L
Aluminium powder (particle diameter 4～5 μ m ball-type aluminium powders) 330g
Be coated in 8 thick carbon steel test pieces of 1mm about 55～65 μ m of coat-thickness after stirring evenly.Dried in the air under the room temperature 1 hour, the dry hardening of coating, nail is scraped, and with oxyacetylene torch test piece is burnt fast to dark red, and about 0.2～0.5 Ω m of coating body resistivity is surveyed in the cooling back, gets 2 test pieces along 90 ° of the curvature bendings of diameter 8mm, and coating does not come off.Get other 3 test pieces by embodiment 1 similarity condition and carry out salt-fog test no iron rust appearance in 1000 hours.Get 3 remaining test pieces and make thermal test, excellent through 100 hours coatings of 1050 bakings.
Embodiment three
Binding agent (by prescription two) 1L
Graphite (colloid powder) 200g
Magnesium oxide (particle diameter is less than 1 μ m) 0.2mol
Aluminium hydroxide (particle diameter is less than 1 μ m) 0.15mol
Ethanol 500ml
Be coated on nonmetallic surfaces such as pottery, glass or plastics, placed under the room temperature 24 hours, apply the short lime set of one deck (by prescription four) again and dry, the coating conduction is good, and has lubrication.Be applied to the equadag coating on the pottery, anti-1500 high temperature.
Embodiment four
Replace the 200g coated with graphite on high temperature steel with the 500g boron nitride, coating processes is with embodiment 3, and coating has well lubricated and antifriction function, and coating can anti-1800 °F not be broken in 50 hours.
Embodiment five
Replace graphite with 500g molybdenumdisulphide, be coated on the steel part, coating processes is with embodiment 3, and coating has well lubricated and antifriction function.
Embodiment six
Replace graphite with the 600g aluminum oxide, be applied on the stainless steel, coating processes is with embodiment 3, coating ability high temperature and heat-blocking action is arranged more than 1500.
Embodiment seven
Aluminium zinc powder with 700g (95%Zn 5%AL) replaces zinc powder, and other is with embodiment 1, and the corrosion resisting property of coating is better than spelter coating.
Embodiment eight
Aluminium zinc powder with 460g (55%AL, 43.5%Zn, 1.5% silicon) replaces the 330g aluminium powder, and other is with embodiment 2.The every performance of coating and the aluminum coating of example 2 are very approaching, but the galvanic protection function is not better than aluminum coating in having the corrosive medium of chlorion.
Embodiment nine
Increase the 2g strontium yellow in embodiment 1, other can prolong the protection life-span of spelter coating with example 1.
Embodiment ten
Formulation for coating material is with embodiment 1, but is not coated with short lime set after drying in the air 2 hours in coating and the air in room temperature applying, and on coating the very thin existing potassium silicate zinc-rich coating of one deck that is coated with, utilize the different acid-basicity of two kinds of coatings, play mutual blood coagulation enhancing effect.
Embodiment 11
Binding agent (by prescription two) 1L
Silver powder (325 order) 1330g
Zinc powder (325 order) 6.4g
Aluminium hydroxide (colloid powder) 24g
Be coated on the non-metallic substrates such as pottery, plastics or glass, placed in air at room temperature 24～72 hours after being coated with, apply the short lime set of one deck (by prescription four) then, to be dried and curing back is cleaned and is fallen to urge the lime set residue, and the coating conduction is good.
Embodiment 12
A moment is soaked in the steel test piece in the gasoline that contains 0.1% machine oil, taking out to dry in the test piece of back has the skim oil film, and according to carrying out salt-fog test behind same coating of embodiment 1 and the method applying coating, effect is identical with example 1.
Embodiment 13
Press the test piece of embodiment 1 and example 2 applying coatings and soak taking-up after 3000 hours in kerosene, coating is as excellent as before, and every after tested performance is constant.
Embodiment 14 binding agents (by the prescription three) 1L aluminium powder (particle diameter 4～5 μ m ball-type aluminium powders) 750g other with embodiment two, effect is also identical.
Claims (11)
1. coating; it is made up of binding agent and inoganic solids particulate; the binding agent that it is characterized in that coating is+2 and the superphosphate of+3 valency metals be scattered in liquid alcohol, or the mixed solution of liquid alcohol and water, or the formed viscous glue solution of mixed solution of liquid alcohol, liquid ketone and water as solvent; binding agent and the mixed coating of inoganic solids particulate; after being coated on the base material, along with the volatilization of solvent, dry voluntarily and sclerosis; form coating, phosphate radical [(PO in the binding agent
4)
3-] content be 0.5～10
Mol/ L ,+2 and the total amount of+3 valence metal ions be 0.056～6.2
Mol/ L, phosphate radical and+2 ,+the mole number ratio of 3 valence metal ion total amounts is 1.4～9: 1, and the content of solvent is 5～95%.
2. by the described coating of claim 1, wherein+2 and the superphosphate of+3 valency metals be selected from superphosphate of metals such as magnesium, zinc, aluminium, calcium, strontium, iron, manganese and chromium and composition thereof, chromium wherein is selected from+3 valency chromium ions or obtain+3 valency chromium ions with reductive agent reduction+6 valency chromium in phosphoric acid solution.
3. by the described coating of claim 1, be added with nonionogenic tenside in its solvent.
4. by claim 1 and the described coating of claim 3, liquid alcohol content is non-vanishing in its solvent, and the content of liquid ketone is not more than 40%, and the content of nonionogenic tenside is not more than 2%, and all the other are water.
5. by the described coating of claim 3, the nonionogenic tenside that is added in its solvent is polyoxyethylene aliphatic alcohol ether [RO (CH
2CH
2O-)
n-H].
6. by the described coating of claim 1, be added with metal inhibitor, its addition is less than 1
Mol/ L.
7. by the described coating of claim 6, the metal inhibitor of interpolation is+6 valency chromium cpds, is selected from chromic anhydride, chromic acid, chromic salt and dichromate.
8. by the described coating of claim 1, wherein liquid alcohol is selected from ethanol, methyl alcohol, n-propyl alcohol, Virahol, propyl carbinol, isopropylcarbinol, Pentyl alcohol, primary isoamyl alcohol and liquid polyvalent alcohol, and their mixture, wherein liquid ketone is selected from acetone, butanone, pimelinketone, and their mixture.
9. by the described coating of claim 1, inoganic solids particulate wherein is selected from aluminium powder, Al alloy powder, zinc powder, Zinc alloy powder, the magnesium powder, the magnesium alloy powder, silver powder, alloy for dental amalgam, copper powder, copper alloy powder, the zinc powder of passivation, the Zinc alloy powder of passivation, the zinc covering aluminium powder, the zincizing aluminium powder, graphite, molybdenumdisulphide, tungsten disulfide, talcum powder, plumbous oxide, boron nitride, magnesium oxide, magnesium hydroxide, zinc oxide, zinc hydroxide, aluminum oxide, aluminium hydroxide, trimagnesium phosphate, zinc phosphate, aluminum phosphate, strontium yellow, zinc chromate, lead chromate, refractory oxide, refractory nitride, refractory carbides, the mixture of refractory silicide and above-mentioned two or more solia particles, the all solids particulate should be able to pass through 100 eye mesh screens, and the amount of the inoganic solids particulate that every liter of binding agent need be concocted is 10～2000g.
10. by the described coating of claim 1, after applying also dry and sclerosis, apply the short lime set of skim again at coatingsurface, quicken the solidification process of coating, should short lime set be the alkaline liquid of pH value 8～14, be selected from the aqueous solution of alkalescence, alcoholic solution, other basic solution and their mixture of alkalescence.
11. by the described coating of claim 10, short lime set wherein is alkali lye and soluble chromatedsolution blended basic solution, this solution is coated on the coating and applies the aqueous solution that one deck is selected from soluble strontium salt, soluble zinc salt and soluble lead salt after drying again, thereby forms the chromic salt precipitation of indissoluble in the hole of coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107671A CN1085709C (en) | 1997-09-09 | 1997-09-09 | Inorganic coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107671A CN1085709C (en) | 1997-09-09 | 1997-09-09 | Inorganic coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1210874A CN1210874A (en) | 1999-03-17 |
| CN1085709C true CN1085709C (en) | 2002-05-29 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97107671A Expired - Fee Related CN1085709C (en) | 1997-09-09 | 1997-09-09 | Inorganic coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1085709C (en) |
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| CN109021649B (en) * | 2018-09-13 | 2020-06-23 | 捷艾悉环保科技（上海）有限公司 | Sewage pipeline anticorrosive agent, preparation method thereof and sewage pipeline anticorrosive method |
| CN109020554B (en) * | 2018-09-21 | 2021-02-26 | 东北大学 | Stainless steel crucible coating for smelting aluminum-lithium alloy and preparation method thereof |
| CN110003692A (en) * | 2019-03-27 | 2019-07-12 | 深圳华材新材料技术有限公司 | Anti-erosion anticorrosive paint and preparation method thereof and coating product |
| CN110204931B (en) * | 2019-05-09 | 2021-03-26 | 中国科学院金属研究所 | Aluminum-chromium-phosphorus-oxygen symbiotic protective coating and preparation method thereof |
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| CN110218469B (en) * | 2019-06-25 | 2021-04-20 | 东方电气集团东方汽轮机有限公司 | High-temperature-resistant graphene conductive water-based anticorrosive paint |
| CN111908886B (en) * | 2020-08-11 | 2022-03-11 | 郑州大学 | High-strength stain-resistant coating liquid and preparation method and application thereof |
| CN114149743A (en) * | 2021-09-30 | 2022-03-08 | 中国航发北京航空材料研究院 | High-temperature anti-corrosion aluminum sacrificial coating and preparation method thereof |
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| US3248251A (en) * | 1963-06-28 | 1966-04-26 | Teleflex Inc | Inorganic coating and bonding composition |
| GB2139639A (en) * | 1983-05-10 | 1984-11-14 | Pathfinders Group The | Decorative noncombustible coating compositions |
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|---|---|---|---|---|
| US3248251A (en) * | 1963-06-28 | 1966-04-26 | Teleflex Inc | Inorganic coating and bonding composition |
| GB2139639A (en) * | 1983-05-10 | 1984-11-14 | Pathfinders Group The | Decorative noncombustible coating compositions |
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| CN1210874A (en) | 1999-03-17 |
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