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Metal surface protective coating layer and preparation method thereof

A metal surface, protective coating technology, applied in the direction of coating, device for coating liquid on the surface, anti-corrosion coating, etc., can solve the problems of poor reliability, poor corrosion resistance, short protection period, etc., to achieve protection Long cycle, good corrosion resistance and good adhesion

Pending Publication Date: 2020-12-11
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of protection system has poor corrosion resistance and poor reliability, and the protection period is short

Method used

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  • Metal surface protective coating layer and preparation method thereof
  • Metal surface protective coating layer and preparation method thereof
  • Metal surface protective coating layer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] For the preparation of protective coatings for steel materials, the sample material is 45 steel, the size is 150mm×100mm×3mm, the surface is milled to a roughness of ≤1.6, and it is ready for use.

[0039] ①. Soak the steel piece in acetone or solvent gasoline for 2 minutes, then wipe it clean with absorbent cotton, and then degrease it in an alkaline degreasing solution at 80°C for 30 minutes; then rinse it with tap water for 45 seconds.

[0040] ②. Preparation of phosphating film: Put the surface-conditioned sample into the zinc-based phosphating solution at 58°C, keep it for 5 minutes, take it out, rinse it with tap water for 45s, and dry it.

[0041] 3. Preparation of coating A: Coating A was prepared on the sample phosphating film surface by air spraying method, wherein the coating formula used for coating A is as shown in Table 1;

[0042] Before spraying, adjust the viscosity of the paint to 20s (measured by Tu-4# cup at room temperature). 15 μm, put the sample ...

Embodiment 2

[0053] For the preparation of high corrosion-resistant protective coatings for steel materials, the sample material is 45 steel, the size is 150mm×100mm×3mm, the surface is milled to a roughness of ≤1.6, and it is ready for use.

[0054] ①. Soak the steel parts in acetone or solvent gasoline for 2 minutes, then wipe them clean with absorbent cotton, and degrease them in an alkaline degreasing solution at 80°C for 30 minutes; then rinse them with tap water for 40 seconds.

[0055] ②. Preparation of phosphating film: Put the surface-conditioned sample into the zinc-based phosphating solution at 55°C, keep it for 6 minutes, take it out, rinse it with tap water for 40s, and dry it.

[0056] 3. Preparation of coating A: Coating A was prepared on the surface of the sample phosphating film by air spraying method, wherein the coating formula used for coating A is as shown in Table 3;

[0057] Before spraying, adjust the viscosity of the paint to 25s (measured by Tu-4# cup at room temp...

Embodiment 3

[0067] Preparation of high corrosion-resistant protective coating for aluminum alloy materials, the sample material is 7A04, the size is 150mm×100mm×3mm, the surface is milled to a roughness of ≤1.6, and it is ready for use.

[0068] ①. Soak the aluminum parts in acetone or solvent gasoline for 2 minutes, then wipe it with absorbent cotton, and then degrease it in an alkaline degreasing solution at 80°C for 30 minutes; then rinse it with tap water for 50 seconds.

[0069] ②. Preparation of anodized film: Soak in alkaline solution at 50°C for 60s. The main components of alkaline solution are: sodium hydroxide 50g / L, sodium gluconate 2g / L; rinse with tap water for 30s; Soak in dilute nitric acid for 5 minutes; rinse with tap water for 30 seconds; prepare aluminum alloy anodized film according to the solution formula and process conditions given in Table 4 for 15 minutes, then rinse with tap water for 60 seconds; seal the oxide film in boiling deionized water Processing time 15mi...

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Abstract

The invention belongs to the technical field of metal protection, and particularly relates to a metal surface protective coating layer. The metal surface protective coating layer comprises coating layers A and coating layers B, and the coating layers A and the coating layers B respectively comprise anode particles and cathode particles and are alternately arranged. The metal surface protective coating layer is good in corrosion resistance, good in damp-heat resistance and good in adhesive force, can be used in cooperation with various kinds of finish paint, and meets the protective requirementof the severe tropical marine atmospheric environment.

Description

technical field [0001] The invention belongs to the technical field of metal protection, in particular to a metal surface protective coating and a preparation method thereof. Background technique [0002] Tropical marine areas have high temperature all year round, a lot of rain, high temperature after rain, and a large amount of rainwater evaporates, forming a high temperature and high humidity atmosphere; and the air has a high salt content, up to 198mg / m 3 , and when in the droplet area, the salt content of the droplet is equivalent to that of seawater (3.5%-3.9%); in addition, tropical marine areas are summer all year round, with long sunshine hours and strong ultraviolet radiation. Due to the high rainfall and high humidity in the tropical marine environment, the high salt content of the water film on the metal surface provides the electrolyte required for electrochemical corrosion, thereby accelerating the process of metal corrosion. Under such harsh environmental condi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/10C09D7/63C09D7/61B05D7/14B05D7/24B05D7/00
CPCB05D7/14B05D7/24B05D7/56C08K2003/0812C08K2003/0893C09D5/103C09D5/106C09D163/00C09D7/61C09D7/63C08K5/12C08K3/08C08K5/5435C08K7/00C08K3/042C08K5/544
Inventor 钱建才邹洪庆许斌吕基成吴厚昌方敏
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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