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Magnesium alloy phosphate surface modified treatment process

A technology of surface modification and treatment method, applied in the direction of metal material coating process, etc., can solve the problems of corrosion resistance and low adhesion, and achieve the effect of short production time, reduced production cost, and simple technical process

Inactive Publication Date: 2006-11-15
NANCHANG UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

The chemical conversion coatings produced by these chromium-free treatment methods are relatively thin, and have low corrosion resistance and adhesion. Magnesium and magnesium alloy surface treatment technology with commercial value and energy saving

Method used

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with embodiment: material is magnesium alloy hand electric drill head shell

[0013] First prepare the solution: place 80 grams of sodium hydroxide accurately in a beaker with an electronic analytical balance at room temperature, add a small amount of distilled water to the beaker and stir to fully dissolve the drug, then pour it into a 1000 ml measuring bottle, and add distilled water to the standard line to prepare 1 liter of degreasing solution. In addition, accurately weigh 80 grams of 50% hydrofluoric acid and 32 grams of ethylene glycol with an electronic analytical balance and place them in a beaker, add a small amount of distilled water to stir in the beaker to fully dissolve the medicine, and then pour it into a 1000 ml measuring bottle. Add distilled water to the mark to prepare 1 liter of pickling activation solution. Then use the same method to weigh 100-180 grams of sodium hydroxide to pr...

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Abstract

This invention is a method about the surface modified treatment of magnesium sulfate, so it can protect and decorate the magnesium alloy. It includes degreasing, activating with acid bath, alkali bath, chemical modifying and sealing process, and it also includes water bath and processes of drying. The modified reagent includes phosphoric acid, barium hydroxide, sodium fluoride and zinc sulfate. The merits of this invention are as fellows: 1. the main treating reagent of this invention is sulfate, and it does not have chrome acid or cyanide, so it is no pollution. 2. The reagent of this invention can be reused by additional addition, so this could save the resource and decrease the cost of production. Contrasting to the anodic oxidation technology, this invention can decrease around 60.5% cost. 3. The process of this technology is simple, is easy to construct automatic production line and does not need large capital for device. 4. The chemical conversion membrane forms by this technology could improve the adhesion of the magnesium alloy and corrosion resistance. 5. This invention grasps the optimum ratio of reagent, temperature of heating and time of treatment, and it also avoids the instability of the reagent, non-homogeneous conversion membrane and is easy to slough.

Description

technical field [0001] The invention relates to a surface modification treatment method of magnesium alloy phosphate. Background technique [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 the advantages of green and environmental protection, it has become an ideal alternative material for electronic product housings and light vehicles in the 21st century, and has broad application prospects in industrial fields such as automobiles, computers, and aerospace. However, since magnesium is an extremely active metal, the standard electrode potential is -2.36V, and its corrosion resistance is extremely poor, which restricts ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/07C23G1/00
Inventor 杨湘杰危仁杰金华兰陈祥
Owner NANCHANG UNIV
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