CN113652106A - Wear-resistant paint taking aluminum ash as raw material and preparation method thereof - Google Patents
Wear-resistant paint taking aluminum ash as raw material and preparation method thereof Download PDFInfo
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- CN113652106A CN113652106A CN202111156676.6A CN202111156676A CN113652106A CN 113652106 A CN113652106 A CN 113652106A CN 202111156676 A CN202111156676 A CN 202111156676A CN 113652106 A CN113652106 A CN 113652106A
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- wear
- aluminum ash
- resistant coating
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a wear-resistant coating taking aluminum ash as a raw material and a preparation method thereof, belonging to the technical field of coatings, wherein the wear-resistant coating comprises the following raw materials in percentage by weight: 30-60% of aluminum ash, 5-10% of adhesive, 0.1-0.2% of lubricating additive, 1-2% of sintering additive, 10-30% of tackifying filler and 20-50% of solvent, wherein the sum of the weight percentages of the raw materials is 100%; the wear-resistant paint prepared by the invention is convenient to use, can be directly coated on the surface of metal, and can be heated and cured; the wear-resistant coating prepared by the invention has high hardness, excellent wear resistance and good temperature change resistance, and is suitable for wear-resistant protection of metal dies, parts, pipelines and the like at the temperature of 500-1000 ℃; the wear-resistant coating can realize sintering and curing at a lower temperature and has excellent performance; the wear-resistant coating is prepared by taking the aluminum ash as the main raw material, so that the cost is lower.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a wear-resistant coating taking aluminum ash as a raw material and a preparation method thereof.
Background
Abrasion is a phenomenon which inevitably exists in daily life of people, and the phenomenon of abrasion exists between two contact surfaces which move mutually. The specific wear is defined as the phenomenon that materials are forced to fall off from a matrix due to physical or chemical action on two friction pair surfaces which do relative motion. The abrasion is one of three main forms of material failure, and according to statistics, about seventy-eight percent of equipment is damaged every year and nearly five percent of energy consumption is attributed to various forms of abrasion, so that not only is energy and material wasted, but also huge economic loss is caused, and the serious and even dangerous personal safety is caused, and the national development is influenced. The wear-resistant coating widely applied at present is mainly a resin-based coating system, has the characteristics of strong adhesive force and excellent wear resistance, but also has the defects of low use temperature and high cost, and the defects limit the use range of the wear-resistant coating.
The aluminum ash is derived from dross generated in the process of electrolyzing aluminum and casting aluminum and can be divided into primary aluminum ash and secondary aluminum ash. The primary aluminum ash is white, is also called white aluminum ash, mainly contains aluminum oxide and metallic aluminum, and can be used as a raw material for aluminum production. The secondary aluminum ash is black in color and also called as black aluminum ash, and contains fluorides harmful to the environment besides aluminum oxide, and the fluorides can cause great harm to the environment, so in 2008, the aluminum ash is listed as national hazardous waste list, and is forbidden to be accumulated outdoors to destroy the environment. And if the aluminum ash is not subjected to harmless treatment during landfill, toxic fluoride causes great harm to the environment. Therefore, the aluminum ash is comprehensively utilized, and the waste is changed into valuable, which is not easy to be solved.
At present, the main approaches for recycling the aluminum ash are as follows: the aluminum ash is used as a raw material to synthesize a water purifying agent, and the aluminum ash is used for road and building materials, but no report about directly preparing the wear-resistant coating by using the aluminum ash as the raw material is found, and the possible reason is that the aluminum ash has complex components, can generate partial gas in the middle and low temperature calcination process, so that a sintered system has more pores, and the wear resistance of the coating is inevitably reduced due to the existence of a large number of pores, so that how to reduce the generation of the pores in the system and improve the wear resistance of the coating has important significance for the research on preparing the wear-resistant coating by using the aluminum ash as the raw material.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a wear-resistant coating taking aluminum ash as a raw material and a preparation method thereof.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a wear-resistant coating taking aluminum ash as a raw material, which comprises the following raw materials in percentage by weight: 30-60% of aluminum ash, 5-10% of adhesive, 0.1-0.2% of lubricating additive, 1-2% of sintering additive, 10-30% of tackifying filler and 20-50% of solvent, wherein the sum of the weight percentages of the raw materials is 100%.
Preferably, the aluminum ash is secondary aluminum ash, and the particle size is 25-350 μm.
The secondary aluminum ash refers to aluminum ash from which metallic aluminum has been extracted.
Preferably, the adhesive is sodium metaaluminate, the lubricating additive is molybdenum disulfide, the sintering additive is borax, the tackifying filler is modified kaolin, and the solvent is water.
Preferably, the kaolin is modified by hydroxypropyl methyl cellulose, and the specific modification method comprises the following steps: mixing and stirring kaolin and hydroxypropyl methyl cellulose solution according to the mass-volume ratio of 100g to (15-20) mL, drying at 100-120 ℃, and crushing.
Preferably, the concentration of the hydroxypropyl methyl cellulose solution is 1.5-2 wt%.
The invention also provides a preparation method of the wear-resistant coating, which comprises the following steps: adding a part of solvent into the aluminum ash, heating for reaction, filtering to obtain aluminum ash filter residue, and mixing with the adhesive, the lubricant, the sintering aid, the tackifying filler and the rest of solvent to obtain the wear-resistant coating.
Preferably, after part of solvent is added into the aluminum ash, the mass ratio of the solvent to the aluminum ash is 1: 5-10, the heating is carried out to 50-120 ℃, the reaction time is 0.5-10 h, and the mixing time is 0.5-3 h.
The invention also provides a coating method of the wear-resistant coating, which comprises the following steps: and uniformly coating the wear-resistant coating on the surface of a workpiece, drying and then heating.
Preferably, the workpiece is subjected to rust removal, oil removal and polishing treatment; the coating thickness is 2-10 mm; the drying is carried out at room temperature for 2-24 hours; heating to 500-1000 ℃; and preserving heat for 1-5 hours after heating.
Compared with the prior art, the invention has the following beneficial effects:
the wear-resistant coating provided by the invention has the advantages of high hardness, excellent wear resistance and good temperature change resistance, and is suitable for wear-resistant protection of metal dies, parts, pipelines and the like at the temperature of 500-1000 ℃.
The fluoride in the aluminum ash can be directly used without treatment, the fluoride in the aluminum ash can play a good lubricating role, the wear resistance of the coating is enhanced, the sintering temperature of the coating can be reduced, the coating can be sintered and cured at a lower temperature, and the coating has excellent performance.
According to the invention, borax is introduced when the wear-resistant coating is prepared by taking aluminum ash as a raw material, so that on one hand, the melting point of insoluble substances in the coating is reduced by utilizing fluoride (such as calcium fluoride) originally existing in the aluminum ash, and the high-temperature fluidity of the wear-resistant coating is promoted, and on the other hand, the generation of pores in the system is reduced by utilizing the high-temperature liquefaction shrinkage performance of the borax, so that the final firing of the wear-resistant coating is repaired.
The wear-resistant coating is prepared by taking the aluminum ash as the main raw material, so that the aluminum ash is efficiently recycled, and the aluminum ash is used as a common industrial waste, has wide source and low price, so that the cost for preparing the wear-resistant coating by taking the aluminum ash as the main raw material is lower.
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Further, for numerical ranges in this disclosure, it is understood that each intervening value, between the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The description and examples are intended to be illustrative only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
The "parts" in the present invention are in parts by weight unless otherwise specified.
The results of the semi-quantitative XRD characterization phase analysis and detection of the secondary aluminum ash used in the following examples are shown in table 1:
TABLE 1
The aluminum ash particles are coarsely crushed by a crusher and sieved to obtain secondary aluminum ash particles with the particle size of 25-350 mu m for standby application, and the description is not repeated below.
Example 1
Putting 50 parts of secondary aluminum ash particles into a reactor, adding 10 parts of water until the mass ratio of liquid to solid of the reactor is 1:5, stirring, heating to 50 ℃, collecting generated gas for other use, reacting for 10 hours, cooling, filtering to obtain secondary aluminum ash filter residue, measuring the water content in the secondary aluminum ash filter residue, adding 8.9 parts of sodium metaaluminate, 0.1 part of molybdenum disulfide, 1 part of borax, 15 parts of kaolin and 15 parts of water into a mixer, and mixing for 0.5 hour to obtain the wear-resistant coating.
Derusting and degreasing the steel plate, polishing the steel plate to be rough, coating the prepared wear-resistant coating on the surface of the steel plate in a spraying mode, wherein the coating thickness is 2mm, placing the steel plate for 2 hours at normal temperature, then placing the steel plate in a heating furnace, heating to 500 ℃, and preserving heat for 5 hours.
Example 2
Putting 40 parts of secondary aluminum ash particles into a reactor, adding 4 parts of water to enable the liquid-solid mass ratio of the reactor to be 1:10, stirring, heating to 120 ℃, collecting generated gas for other use, reacting for 0.5h, cooling, filtering to obtain secondary aluminum ash filter residue, measuring the water content in the secondary aluminum ash filter residue, adding 8.9 parts of sodium metaaluminate, 0.1 part of molybdenum disulfide, 1 part of borax, 15 parts of kaolin and 21 parts of water into a mixer, and mixing for 3h to obtain the wear-resistant coating.
Derusting and degreasing the steel plate, polishing the steel plate to be rough, coating the prepared wear-resistant coating on the surface of the steel plate in a spraying mode, wherein the coating thickness is 10mm, placing the steel plate for 24 hours at normal temperature, then placing the steel plate in a heating furnace, heating the steel plate to 1000 ℃, and preserving the heat for 1 hour.
Example 3
Preparing a hydroxypropyl methyl cellulose solution with the concentration of 1.8 wt%, mixing kaolin and the hydroxypropyl methyl cellulose solution according to the mass-volume ratio of 100 g: 18mL, stirring for 1h, and drying at 110 ℃ to constant weight to obtain hydroxypropyl methyl cellulose modified kaolin;
Putting 50 parts of secondary aluminum ash particles into a reactor, adding 10 parts of water to ensure that the liquid-solid mass ratio of the reactor is 1:5, stirring, heating to 50 ℃, collecting generated gas for other use, reacting for 10 hours, cooling, filtering to obtain secondary aluminum ash filter residue, measuring the water content in the secondary aluminum ash filter residue, adding 8.9 parts of sodium metaaluminate, 0.1 part of molybdenum disulfide, 1 part of borax, 15 parts of the hydroxypropyl methyl cellulose modified kaolin prepared by the method and 15 parts of water into a mixer, and mixing for 0.5 hour to obtain the wear-resistant coating.
Derusting and degreasing the steel plate, polishing the steel plate to be rough, coating the prepared wear-resistant coating on the surface of the steel plate in a spraying mode, wherein the coating thickness is 2mm, placing the steel plate for 2 hours at normal temperature, then placing the steel plate in a heating furnace, heating to 500 ℃, and preserving heat for 5 hours.
Comparative example 1
The difference from example 1 is that alpha-alumina is used instead of the secondary aluminous ash.
Comparative example 2
The difference from example 1 is that no borax was added.
The coatings obtained in examples 1 to 3 and comparative examples 1 to 2 were examined for their appearance pre-cured at room temperature, appearance after firing, coating hardness, resistance to thermal change, pencil hardness at room temperature, and abrasion resistance, and the results are shown in table 2:
TABLE 2
As can be seen from Table 2, the invention uses the secondary aluminum ash as the main raw material, uses the sodium metaaluminate as the adhesive, uses the molybdenum disulfide as the lubricating additive, uses the borax as the sintering additive and uses the kaolin as the tackifying filler, and pretreats the secondary aluminum ash before mixing, so that the prepared wear-resistant coating does not generate a large amount of pores after coating and sintering, thereby enhancing the wear resistance, obtaining a coating with high hardness, good wear resistance and excellent temperature resistance performance by sintering at low temperature, and realizing the purpose of preparing the wear-resistant coating with excellent performance on the basis of adding the secondary aluminum ash in a large proportion.
As can be seen from the comparison of the data in the embodiment 1 and the embodiment 3, the modification of the hydroxypropyl methyl cellulose on the kaolin can lead the normal-temperature pre-curing effect of the wear-resistant coating to be better, and the wear-resistant performance after firing is also obviously improved, because the kaolin is modified by the hydroxypropyl methyl cellulose, the kaolin can be better crosslinked with a system, so that the compactness of the coating during pre-curing is improved; as can be seen from the comparison of the data of example 1 and comparative example 1, the wear-resistant coating prepared by replacing secondary aluminum ash with alpha-alumina has poor wear resistance and poor temperature denaturation resistance, probably because of less fluoride, and the structure is not compact due to incomplete low-temperature sintering of the system; as can be seen from the comparison of the data of the example 2 and the comparative example 2, the borax can well reduce the porosity of the wear-resistant coating after being fired and improve the temperature resistance and the wear resistance of the wear-resistant coating.
The above description is only for the preferred embodiment of the present invention, and the protection scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention, the technical solution and the inventive concept of the present invention equivalent or change within the technical scope of the present invention.
Claims (9)
1. The wear-resistant coating taking aluminum ash as a raw material is characterized by comprising the following raw materials in percentage by weight: 30-60% of aluminum ash, 5-10% of adhesive, 0.1-0.2% of lubricating additive, 1-2% of sintering additive, 10-30% of tackifying filler and 20-50% of solvent, wherein the sum of the weight percentages of the raw materials is 100%.
2. The wear-resistant coating as claimed in claim 1, wherein the aluminum ash is secondary aluminum ash with a particle size of 25-350 μm.
3. The wear-resistant coating of claim 1, wherein the adhesive is sodium metaaluminate, the lubricating additive is molybdenum disulfide, the sintering additive is borax, the adhesion promoting filler is modified kaolin, and the solvent is water.
4. The wear-resistant coating according to claim 3, wherein the kaolin is modified by hydroxypropyl methylcellulose, and the modification method comprises the following steps: mixing and stirring kaolin and hydroxypropyl methyl cellulose solution according to the mass-volume ratio of 100g to (15-20) mL, drying at 100-120 ℃, and crushing.
5. The abrasion-resistant coating according to claim 4, wherein the concentration of the hydroxypropyl methylcellulose solution is 1.5-2 wt.%.
6. A method for preparing a wear-resistant coating as claimed in any one of claims 1 to 5, comprising the steps of: adding a part of solvent into the aluminum ash, heating for reaction, filtering to obtain aluminum ash filter residue, and mixing with the adhesive, the lubricating aid, the sintering aid, the tackifying filler and the rest of solvent to obtain the wear-resistant coating.
7. The preparation method of claim 6, wherein after the partial solvent is added into the aluminum ash, the mass ratio of the solvent to the aluminum ash is 1: 5-10, the heating is carried out to 50-120 ℃, the reaction time is 0.5-10 h, and the mixing time is 0.5-3 h.
8. The method for applying the abrasion-resistant coating according to any one of claims 1 to 5, comprising the steps of: and coating the wear-resistant coating on the surface of a workpiece, drying and then heating.
9. The coating method according to claim 8, wherein the workpiece is a workpiece subjected to rust removal, oil removal and polishing treatment; the coating thickness is 2-10 mm; the drying is carried out at room temperature for 2-24 hours; heating to 500-1000 ℃; and preserving heat for 1-5 hours after heating.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114671446A (en) * | 2022-03-07 | 2022-06-28 | 东北大学 | Preparation method of modified aluminum-based oxide |
| CN116574396A (en) * | 2023-04-27 | 2023-08-11 | 江西省科学院应用化学研究所 | Heat insulation coating with aluminum ash as raw material and preparation method and application thereof |
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| CN102277082A (en) * | 2011-09-06 | 2011-12-14 | 华东理工大学 | Self-lubricating sintering coating and coating method |
| CN105733372A (en) * | 2016-04-18 | 2016-07-06 | 上海在邦化工有限公司 | Compound lubricating anti-wear coating for coating standard piece and preparation method and application of compound lubricating anti-wear coating |
| CN110577758A (en) * | 2019-09-17 | 2019-12-17 | 江西省科学院应用化学研究所 | Method for preparing carbon anode antioxidant coating for electrolytic aluminum by comprehensively utilizing aluminum ash |
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2021
- 2021-09-30 CN CN202111156676.6A patent/CN113652106B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277082A (en) * | 2011-09-06 | 2011-12-14 | 华东理工大学 | Self-lubricating sintering coating and coating method |
| CN105733372A (en) * | 2016-04-18 | 2016-07-06 | 上海在邦化工有限公司 | Compound lubricating anti-wear coating for coating standard piece and preparation method and application of compound lubricating anti-wear coating |
| CN110577758A (en) * | 2019-09-17 | 2019-12-17 | 江西省科学院应用化学研究所 | Method for preparing carbon anode antioxidant coating for electrolytic aluminum by comprehensively utilizing aluminum ash |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114671446A (en) * | 2022-03-07 | 2022-06-28 | 东北大学 | Preparation method of modified aluminum-based oxide |
| CN116574396A (en) * | 2023-04-27 | 2023-08-11 | 江西省科学院应用化学研究所 | Heat insulation coating with aluminum ash as raw material and preparation method and application thereof |
| CN116574396B (en) * | 2023-04-27 | 2024-02-23 | 江西省科学院应用化学研究所 | Heat insulation coating with aluminum ash as raw material and preparation method and application thereof |
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