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

A workpiece surface, anti-corrosion coating technology, applied in metal material coating process, coating, solid diffusion coating and other directions, can solve the problems of the mechanical properties of the workpiece surface can not be significantly improved, the process is complicated and so on

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: get 15wt% zinc powder with particle size of 100 mesh to 200 mesh, 20wt% aluminum powder with particle size of 100 mesh to 300 mesh, 10wt% magnesium powder with particle size of 100 mesh to 200 mesh, 1wt% 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: Take 3wt% NaOH solution and 2wt% sodium silicate solution and mix according to the ratio of 1:1 to prepare degreasing mixture, immerse the machined workpiece in the degreasing mixture, mix the degreasing The temperature of the liquid is raised to 80°C and soaked for 30 minutes, and the material of the workpiece is Q235b;

[0042] Derusting treatment: use hydrochloric acid solution with a mass concentration of 15% to clean the anti-falling beam workpiece after degreasing treatment to remove rust and scale;

[0043] Cleaning treatment: clean the workpiece with tap water;

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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% magnesium 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, derusting treatment, cleaning treatment, infiltration 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 480°C, and turn the vacuum furnace 3 times per...

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% magnesium 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] Low-temperature co-infiltration treatment: take the prepared co-infiltration agent and the anti-fall beam workpiece and put them into the vacuum co-infiltration furnace, and embed the anti-fall beam workpiece in the co-infiltration agent. The volume ratio of the co-infiltration agent to the workpiece is 1: 1. Vacuumize the vacuum furnace until the vacuu...

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PUM

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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 magnesium powder, 0.1wt%-2.0wt% of activating agent powder and the balance filling agent; and embedding and heating a workpiece in the co-doping agent powder to 400-600 DEG C, and performing heat preservation for 3-10h for co-doping treatment. Compared with the prior art, one part of magnesium 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 magnesium 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 anticorrosion coating, in particular to a method for preparing a ZnAlMg multi-element alloy anticorrosion coating on the surface of a workpiece. Background technique [0002] At present, various workpiece surface anticorrosion treatment methods have been disclosed. For example, the zinc-aluminum alloy co-infiltration process is currently a commonly used anti-corrosion treatment method for metal workpieces. This process uses the infiltration and diffusion of metal atoms in a heated state to infiltrate zinc and aluminum elements into steel without phase change in the metal matrix. The surface of the component forms an alloy protective layer to improve the corrosion resistance, surface oxidation resistance and wear resistance of the workpiece surface. However, due to the single anti-corrosion performance and unstable performance of the workpiece containing zinc-aluminum coating prepared by this proc...

Claims

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Application Information

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