Method for preparing ZnAlNi multi-component alloy anticorrosive coating on workpiece surface

A technology of anti-corrosion coating and workpiece surface, applied in metal material coating process, coating, solid diffusion coating and other directions, can solve the problems of complex process and the mechanical properties of workpiece surface cannot be significantly improved.

Inactive Publication Date: 2010-03-10
BEIJING ZHONGLUDACHENG SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above coating has a good anti-corrosion effect, the mechanical properties of the workpiece surface cannot be significantly improved, and the process is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Prepare co-penetration agent: take 15wt% zinc powder with a particle size of 200 mesh to 500 mesh, 20wt% aluminum powder with a particle size of 100 mesh to 300 mesh, 10wt% nickel powder with a particle size of 100 mesh to 200 mesh, and 1.0wt% ammonium chloride , the remaining particle size is 40 mesh to 100 mesh quartz sand and evenly mixed to obtain co-penetration agent powder;

[0041] Degreasing treatment: get 3wt% NaOH solution and 2wt% sodium silicate solution and mix according to the ratio of 1:1 to prepare degreasing mixed solution, immerse the anti-fall beam workpiece after machining in the described degreasing mixed solution, and The degreasing mixture is heated to 80°C and soaked for 30 minutes, and the material of the workpiece is Q235b;

[0042] Rust removal treatment: wash the workpiece after degreasing treatment with a hydrochloric acid solution with a mass concentration of 15% to remove rust and scale;

[0043] Cleaning treatment: clean the workpiece wi...

Embodiment 2

[0053] Take 30wt% zinc powder with particle size of 100 mesh to 200 mesh, 10wt% aluminum powder with particle size of 100 mesh to 300 mesh, 20wt% nickel powder with particle size of 100 mesh to 200 mesh, 2wt% ammonium chloride, and the remaining particle size is 40 Mesh ~ 100 mesh quartz sand is uniformly mixed to obtain co-penetration agent powder;

[0054] The processes such as used workpiece and degreasing treatment, cleaning treatment, derusting treatment, infiltration aid treatment, drying treatment are identical with embodiment 1;

[0055] Co-infiltration treatment: Take the prepared co-infiltration agent and the workpiece into the vacuum co-infiltration furnace, and embed the workpiece in the co-infiltration agent. The volume ratio of the co-infiltration agent to the workpiece is 1:1, and the vacuum furnace is evacuated When the vacuum degree is less than 0.5kPa, raise the temperature of the vacuum co-infiltration furnace to 450°C, and turn the vacuum furnace 3 times pe...

Embodiment 3

[0062] Take 20wt% zinc powder with a particle size of 100 mesh to 200 mesh, 15wt% aluminum powder with a particle size of 100 mesh to 300 mesh, 15wt% nickel powder with a particle size of 100 mesh to 200 mesh, and 5wt% lanthanum oxide powder with a particle size of 100 mesh to 200 mesh , 2wt% ammonium chloride, and the remaining particle size is 100 mesh to 300 mesh quartz sand and evenly mixed to obtain co-penetration agent powder;

[0063] The processes such as used workpiece and degreasing treatment, derusting treatment, cleaning treatment, infiltration treatment, drying treatment are identical with embodiment 1;

[0064] Samples were taken for testing, and an alloyed layer with a thickness of about 90 microns was formed on the surface of the workpiece. The element content analysis results on the surface of the alloyed layer were as follows: 16.68wt% Fe, 31.67wt% Zn, 28.62wt% Al, 21.42wt% Ni , 1.26wt% of La, and 0.35wt% of other elements.

[0065] Performance Testing:

[...

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Abstract

The invention provides a method for preparing an anticorrosive coating on a workpiece surface. The method comprises the following steps: providing the following co-doping agent powder by weight percent: 15wt%-30wt% of zinc powder, 10wt%-20wt% of aluminium powder, 10wt%-20wt% of nickel powder, 0.1wt%-2.0wt% of activating agent powder and the balance filling agent; and embedding a workpiece in the co-doping agent powder, heating the workpiece to 400-600 DEG C, and performing heat preservation for 3-10h for co-doping treatment. Compared with the prior art, one part of nickel is added into the co-doping agent powder to change the content of other components in the co-doping agent; and the experimental result proves that the nickel element is added into the anticorrosive coating to obviously improve corrosion resistance and surface hardness of the anticorrosive coating.

Description

technical field [0001] The invention relates to a method for preparing a metal anti-corrosion coating, in particular to a method for preparing a ZnAlNi multi-element alloy anti-corrosion coating on the surface of a workpiece. Background technique [0002] Because railway workpieces are exposed to the sun and rain all year round, cold in winter and hot in summer, and are used in harsh environments, they are often corroded due to atmospheric and rainwater corrosion, which can easily lead to a significant decline in the mechanical properties of components and early failure, resulting in hidden dangers to traffic safety. Therefore, it is necessary to carry out high-quality surface anti-corrosion treatment on parts to prevent corrosion, improve the surface corrosion resistance of parts and prolong their service life, thereby improving the safety factor of railway traffic. [0003] At present, various workpiece surface anticorrosion treatment methods have been disclosed. For exam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C10/52
CPCC23C10/52
Inventor 肖占华陈松
Owner BEIJING ZHONGLUDACHENG SCI & TECH DEV
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