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Coating, coating and preparation method for material surface treatment

A surface treatment and coating technology, applied in coatings, anti-corrosion coatings, fire-resistant coatings, etc., can solve the problems of high equipment and process requirements, high processing requirements, insufficient wear resistance, etc., and achieve excellent corrosion resistance and coating preparation Ease of use and low cost of use

Active Publication Date: 2021-03-09
泰兴库本机电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN105368100A, coating liquid coating for surface modification of magnetic materials and its preparation method, mainly uses zinc and aluminum metal powder combined with titanium powder, phosphorus iron powder and silica sol in Dacromet process as film-forming agent, Supplemented with complexing agent, surfactant, silane coupling agent, wetting agent, PH regulator, diluent and other materials, and then undergoing appropriate curing process, it can solve the chromic acid pollution and film formation of traditional dacromet treatment However, the core is still the improvement of the traditional Dacromet process, which requires high pre-treatment of magnetic materials, and the use of some epoxy active diluents has certain environmental hazards.
Chinese patent CN104894553B The method for improving the performance of the surface modification layer and its application, forming a primer layer by coating inorganic zinc-rich silicon sol on the surface of the material to be treated, and then coating the zinc-chromium coating solution on the primer layer to form a zinc-chromium film , the zinc-chromium coating solution used is composed of zinc powder, aluminum powder, chromic anhydride, boric acid, surfactant, pH regulator and deionized water, etc. The bonding force and resistance of the zinc-chromium film to the substrate are improved through the transition of the primer layer. The grinding ability and corrosion resistance have also been greatly improved. Its technical essence is the improvement of the traditional Dacromet process. It needs primer treatment and uses chromium-containing coating liquid, which has certain environmental hazards.
Chinese patent CN105420669B is a vapor deposition method for permanent magnet anticorrosion treatment. It uses physical vapor deposition technology to deposit a nano-multilayer structure film on the surface of NdFeB, and then performs electrophoresis treatment on the surface of the deposited film. Pretreatment of the boron surface replaces the phosphating method, overcomes the damage to the NdFeB magnetic properties caused by the phosphating process, has excellent bonding performance with magnets, and significantly improves the corrosion resistance of NdFeB. It is a combination of vapor deposition technology and electrophoresis. However, the vapor deposition technology is complex and requires high equipment and processes, making it difficult to popularize and apply
The use of electroplating, electroless plating and oxidation treatment methods is restricted due to the production of more waste liquid and the impact on the environment, and the corrosion resistance is average. Epoxy resin coating will produce a certain amount of VOC emissions. Dacromet treated fasteners are used at high temperatures. It will lose the function of sacrificial anode under the condition, and cannot provide effective electrochemical protection, and the film layer is soft, and the wear resistance is also insufficient.
Chinese patent CN107722765A discloses a water-based chromium-free zinc-aluminum coating and its preparation method, which consists of film formers, metal powder, self-lubricating fillers, wetting agents, dispersants, corrosion inhibitors, thickeners, defoamers, water Composition, which uses a mixture of self-crosslinking acrylate emulsion and nano-silica sol, cured at room temperature, the coating has a self-lubricating function, will not be damaged during assembly, has excellent anti-corrosion performance, meets environmental protection requirements, but in high temperature environment Use will cause the electrode potential of zinc powder to reverse, which will affect the electrochemical protection effect
Chinese patent CN106700701A discloses a high-temperature-resistant and environmentally friendly dacromet coating, coating and its preparation method, using metal slurry, chromium-free passivation solution, and related additives. The metal powder is composed of flake zinc powder, flake aluminum powder, Composed of flaky magnesium powder and flaky manganese powder, magnesium manganese powder is used to replace part of the zinc powder, and absolute ethanol is used to replace water, which effectively solves the problem that the electrode potential of the zinc powder reverses at high temperature and causes the traditional dacromet coating to fail. The coating has excellent high-temperature corrosion resistance and thermal shock resistance, and can play a good role in protecting the fasteners related to marine high-temperature components, thereby further prolonging the service life of the fasteners. However, due to the use of flaky magnesium powder and absolute ethanol, which brings certain hidden dangers to safe production and environmental safety
Chinese patent CN103911508A discloses an anti-corrosion and anti-bacterial anodic electrophoretic coating for railway fasteners and its coating method. The color paste emulsion and deionized water are mixed into the electrophoretic tank to form an electrophoretic coating, and the electrophoretic coating is cured to form an anti-corrosion and anti-bacterial coating. , the coating has excellent mechanical properties, corrosion resistance, and antibacterial properties, but the hardness of the obtained coating is 2H, and the wear resistance of the coating needs to be improved
[0007] From the above analysis, it can be seen that in the field of material surface treatment, the existing treatment methods and research results all have certain deficiencies.

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  • Coating, coating and preparation method for material surface treatment

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preparation example Construction

[0057] The preparation method disclosed in the present invention should be understood as an effective method rather than the only method to achieve the purpose of the invention. The recombination of the addition order of each component and the simple change of temperature and time should not affect the use effect and performance of the final coating , should be considered specifically disclosed herein.

[0058] The specific disclosure of each component involved in the present invention is based on the scope of the inventor's knowledge and the disclosure of the components actually used in a large number of tests, and is not a specific limitation on the components.

[0059] The component contents expressed in the present invention are all percentages by weight unless otherwise specified.

[0060] Unless otherwise specified, all raw materials in the embodiments of the present invention are commercially available industrial supplies, and can be obtained through commercial channels...

Embodiment 1

[0107] (1) Preparation of paint

[0108] Acidic silica sol with a concentration of 30% (the following are all acidic silica sols with a content of 30% unless otherwise specified) 10% (mass percentage, unless otherwise specified below are all indicated as mass percent), deionized water 30%, B Glycol 2%, Nano TiO 2 1%, nano-SiO 2 0.5%, mica powder 5.5%, graphite powder 1%, mix evenly to get filler dispersion liquid; take 50% phytic acid (the following are 50% phytic acid unless otherwise specified) 15%, deionized water 31 %, heated to 50°C, stirred and kept warm for 0.5h, stirred evenly to obtain complexing agent solution; mixed filler dispersion and complexing agent solution, then added 1% benzotriazole and 3% boric acid to the mixture, mixed After obtaining the coating with a pH value of 4;

[0109] (2) Preparation of coating

[0110] Apply the coating obtained in (1) to the surface of samples A, B, and C by dipping, and dry for 24 hours under natural conditions to obtain ...

Embodiment 2

[0114] (1) Preparation of paint

[0115] Take 30% acidic aluminum sol with a concentration of 20% (the following are all acidic aluminum sols with a content of 20% unless otherwise specified), 5% deionized water, 10% propylene glycol, MoS 2 2%, zinc phosphate 2%, silicon carbide 2%, whisker silicon 2%, talcum powder 5%, mix well to get filler dispersion; take sulfosalicylic acid 15%, deionized water 11%, heat to 50 ℃, keep stirring for 1 hour, and stir evenly to obtain a complexing agent solution; mix the filler dispersion and the complexing agent solution, and then add 6% tolyltriazole and 85% phosphoric acid to the mixture (if not specified below, Both are phosphoric acid with a content of 85%) 5%, oxalic acid 5%, after mixing evenly, a coating with a pH value of 1 is obtained;

[0116] (2) Preparation of coating

[0117] Apply the paint obtained in (1) to the surface of samples A, B, and C by brushing, dry at 240°C for 60 minutes, then brush the paint obtained in (1) on t...

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Abstract

The invention discloses a paint for material surface treatment, a coating and a preparation method thereof. The paint contains inorganic film-forming agent, complexing agent, filler, pH regulator, corrosion inhibitor, dispersant, and the rest contains deionized water. The coating is PH1-4, and the coating is formed by curing the coating on the surface of the material. The coating of the present invention is single-component, stable in storage, easy to prepare, friendly to the environment, free of VOC emissions, the formed coating has high hardness, excellent wear resistance, and the anti-corrosion effect is obviously better than the existing technical level, especially suitable for magnetic The surface treatment of materials NdFeB and fasteners has broad application prospects and promotion value.

Description

technical field [0001] The invention relates to a paint for material surface treatment, a coating and a preparation method thereof, and belongs to the technical field of material surface treatment. Background technique [0002] In the field of material surface treatment, the use of anti-corrosion coatings to form anti-corrosion coatings on the surface of materials is one of the important means of material anti-corrosion surface treatment and the main method to improve the corrosion resistance of materials. It is generally formed by chemical conversion coatings, metal coatings or organic coatings. The barrier layer is used to block the contact of air, water and other corrosive media with the material matrix, so as to achieve the purpose of prolonging the service life of the material. At present, the commonly used surface treatment methods mainly include phosphating treatment, electroplating, electrophoretic coating, paint coating, organic coating coating, special coating coat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D5/08C09D7/20C09D7/61C09D7/63
CPCC09D1/00C09D5/08C09D5/18C09D7/20C09D7/61C09D7/63
Inventor 任天翼任宏生
Owner 泰兴库本机电有限公司