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Environment-friendly type magnesium alloy skin membrane treatment solution and its preparation method

A film treatment liquid and magnesium alloy technology, which is applied in the direction of anti-corrosion coatings, etc., can solve problems such as environmental impact and environmental hazards, and achieve the effect of strengthening environmental protection, reducing burden, and strong corrosion resistance of the film layer

Active Publication Date: 2014-06-04
MITAC PRECISION TECH(KUNSHAN) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Patent CN101560657 discloses a surface chemical conversion treatment method for magnesium alloys, which includes treating magnesium alloy products with a film solution containing phosphoric acid to form a phosphating film layer. Although the film layer is smooth and dense, phosphorus will cause plants to become rich Nutritious and harmful to the environment
Patent CN101451239 discloses a chemical conversion treatment solution containing an aqueous solution such as phosphate, although the film formed by the treatment solution will have better corrosion resistance, but the phosphorus contained in the formula still has a certain impact on the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The invention provides an environment-friendly magnesium alloy film treatment solution, wherein the film treatment solution is an anhydrous ethanol solution containing a silane coupling agent, a pH regulator and additives.

[0025] The membrane treatment solution of the present invention, calculated by mass concentration, comprises:

[0026] KH792 80g / L;

[0027] Acetic acid 30g / L;

[0028] RPE1720 20g / L;

[0029] Absolute ethanol balance.

[0030] The present invention also provides a method for preparing an environment-friendly magnesium alloy film treatment solution. In this embodiment, the method includes the following steps:

[0031] (1) First add the main film-forming agent KH792 into the beaker, and then dilute it with a small amount of ethanol;

[0032] (2) Add acetic acid and RPE1720 to the above beaker in turn, and then add a certain amount of absolute ethanol;

[0033] (3) Put the above-mentioned beaker with the added formula on a magnetic stirrer to sti...

Embodiment 2

[0036] The invention provides an environment-friendly magnesium alloy film treatment solution, wherein the film treatment solution is an anhydrous ethanol solution containing a silane coupling agent, a pH regulator and additives.

[0037] The membrane treatment solution of the present invention, calculated by mass concentration, comprises:

[0038] Si-563 90g / L;

[0039] Malonic acid 50g / L;

[0040] Glycerin 20g / L;

[0041] Absolute ethanol balance.

[0042] The present invention also provides a method for preparing an environment-friendly magnesium alloy film treatment solution. In this embodiment, the method includes the following steps:

[0043] (1) First add the main film-forming agent Si-563 into the beaker, and then dilute with a small amount of ethanol;

[0044] (2) Add malonic acid and glycerin to the above beaker in turn, and then add a certain amount of absolute ethanol;

[0045] (3) Put the above-mentioned beaker with the added formula on a magnetic stirrer to ...

Embodiment 3

[0048] The invention provides an environment-friendly magnesium alloy film treatment solution, wherein the film treatment solution is an anhydrous ethanol solution containing a silane coupling agent, a pH regulator and additives.

[0049] The membrane treatment solution of the present invention, calculated by mass concentration, comprises:

[0050] KH550 95g / L;

[0051] Lactic acid 80g / L;

[0052] RPE1740 30g / L;

[0053] Absolute ethanol balance.

[0054] The present invention also provides a method for preparing an environment-friendly magnesium alloy film treatment solution. In this embodiment, the method includes the following steps:

[0055] (1) First add the main film-forming agent KH550 into the beaker, and then dilute with a small amount of ethanol;

[0056] (2) Add lactic acid and RPE1740 to the above beaker in turn, and then add a certain amount of absolute ethanol;

[0057] (3) Put the above-mentioned beaker with the added formula on a magnetic stirrer to stir t...

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Abstract

The invention provides an environment-friendly type magnesium alloy skin membrane treatment solution and its preparation method, and the environment-friendly type magnesium alloy skin membrane treatment solution is an ethanol solution comprising a silane coupling agent, a pH regulator and an additive. The preparation method comprises the following steps: (1) first adding the silane coupling agent in a beaker, and then diluting the silane coupling agent with a small amount of ethanol; (2) sequentially adding the pH regulator and the additive, and finally adding a certain amount of anhydrous ethanol; (3) putting the beaker added in accordance with the formulation on a magnetic stirrer for stirring the solution with the stirring time being 1-2h. Compared with the prior art, the environment-friendly type magnesium alloy skin membrane treatment solution and its preparation method have the following advantages: the skin membrane treatment solution does not contain phosphorus and chromium and other elements harmful to the environment, thus reducing the burden on wastewater treatment, and strengthening the environment protection, the membrane layer corrosion resistance of an obtained magnesium alloy product is strong, and the magnesium alloy product can passes through 48 hours of a neutral salt spray test.

Description

【Technical field】 [0001] The invention relates to a magnesium alloy surface treatment liquid and a preparation method thereof, in particular to an environment-friendly magnesium alloy film treatment liquid and a preparation method thereof. 【Background technique】 [0002] Because magnesium alloy material is a light structural material, the quality is 2 / 3 of aluminum and 1 / 4 of steel. Compared with steel, aluminum, plastic and other engineering materials, magnesium alloy has good strength and rigidity, and good electromagnetic shielding performance , non-magnetic; good shock absorption; non-toxic, recyclable; excellent machinability, high die-casting productivity, small size shrinkage, excellent low temperature performance and high thermal conductivity are widely used; but due to magnesium and its The alloy itself has poor chemical stability and is easily corroded by oxidation, which has become a bottleneck for its further development. [0003] At present, there are many type...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08
Inventor 张德成
Owner MITAC PRECISION TECH(KUNSHAN) CORP