Magnesium alloy product surface modification treatment method

A technology of surface modification and treatment method, which is applied in the direction of metal material coating technology, etc.

Inactive Publication Date: 2014-10-08
东莞钢钢镁铝科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned chromium-free treatment method, when the conversion treatment is performed, the solution is unstable, the conversion film layer is uneven, easy to fall off, the adhesion performance is not good, and the obtained protective film is relatively thin and has poor corrosion resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] 1. Configure reagents

[0025] A. Configure degreasing solution

[0026] Weigh 80 grams of sodium hydroxide, dissolve, and then add purified water to dilute to 1 liter.

[0027] B. Configure pickling activation solution

[0028] Weigh 80 grams of 50% hydrofluoric acid and 32 grams of ethylene glycol, add a small amount of pure water and stir to fully dissolve, add pure water to dilute to 1 liter, and obtain a pickling activation solution.

[0029] C. Configure alkaline washing solution

[0030] Weigh 200-250 grams of sodium hydroxide, add a small amount of distilled water to dissolve, and then dilute to 1 liter with purified water.

[0031] D. Configure modified solution

[0032] Weigh 60-100 grams of phosphoric acid, 40-60 grams of calcium hydroxide, 1-4 grams of sodium fluoride, 2-6 grams of zinc phosphate, and 3-8 grams of sodium chloride to prepare 1 liter of solution.

[0033] 2. Take AZ91D magnesium alloy material for surface modification treatment:

[0034]...

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Abstract

The invention relates to a magnesium alloy product surface modification treatment method. The method includes working procedures of degreasing, pickling activation, alkali washing, and chemical modification, wherein an adopted modification solution comprises phosphoric acid, calcium hydroxide, sodium fluoride, zinc phosphate and the like. The method not only can meet the requirements of environmental protection and improve corrosion resistance, adhesive power, low impedance and other properties of a magnesium alloy, but also saves costs.

Description

technical field [0001] The invention relates to a surface treatment method for metal materials, in particular to a surface modification treatment method for magnesium alloy products. technical background [0002] With various application equipment becoming lighter, thinner and shorter and higher requirements are put forward for its heat dissipation and electromagnetic shielding performance, magnesium alloy has good thermal conductivity, electromagnetic shielding and vibration damping properties due to its small specific gravity, high specific strength and specific stiffness. As well as green and environmental protection, it has become an ideal alternative material for electronic product housings and light vehicles in the 21st century. It has broad application prospects in industrial fields such as automobiles, 3C products, and aerospace. Therefore, magnesium alloys have advantages when used as structural materials. has important practical significance. Since magnesium is an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/78C23C22/36
Inventor 黄赞文陈伟刘建学余黄波
Owner 东莞钢钢镁铝科技有限公司
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