Magnesium alloy surface treatment cleaning liquid and treatment method

A surface treatment, magnesium alloy technology, applied in the field of cleaning liquid for black corrosive substances, can solve the problems of inability to clean, low efficiency, difficult to handle, etc., and achieves the effects of good cleaning effect, simple cleaning process and low cost.

Inactive Publication Date: 2010-10-20
东莞东运镁业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small size of workpieces such as mobile phones and notebooks, and after the mold is formed, the burrs left on the workpieces, especially the burrs in the complicated inner cavity parts or intersecting lines of intersecting holes, are difficult to deal with. The traditional process can only be processed by hand; however, manual processing has poor accessibility on the one hand, and low efficiency on the other hand, especially in the process of manual grinding, due to the activity of magnesium alloy, it is easy to cause safety hazards
Relatively speaking, the use of electrochemical deburring has obvious advantages; however, corresponding black corrosion products will be left on the workpiece after electrochemical treatment. Generally, traditional magnesium alloy cleaning solutions are mostly developed for the chemical formation process. It is to cover the surface of the product with a film. Although it also has the effect of cleaning the product, after the electrochemical treatment of the magnesium alloy, the black corrosion formed on the workpiece cannot be cleaned.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A cleaning solution for magnesium alloy surface treatment; it consists of the following substances calculated by weight percentage: 45% nitric acid; 55% hydrofluoric acid; the balance is water. First mix the above-mentioned amount of nitric acid with a concentration of 5.0% in every one hundred liters of water; then add the above-mentioned amount of hydrofluoric acid with a concentration of 5.0%, and finally mix with water and stir evenly.

[0029] The method for surface treatment of magnesium alloys with the above cleaning: first place the magnesium alloy castings after electrochemical deburring treatment in the cleaning solution for 30 seconds at room temperature; then put the magnesium alloys in pure water for 10 seconds Then put it into the alkaline solution for 30 seconds, and finally wash it with pure water for 10 seconds, dry it, and send the finished product into the next chemical process.

Embodiment 2

[0031] A cleaning solution for magnesium alloy surface treatment; it is composed of the following substances calculated by weight percentage: 50% of nitric acid; 50% of hydrofluoric acid; the balance of water. First mix the above-mentioned amount of nitric acid with a concentration of 6.8% in every one hundred liters of water; then add the above-mentioned amount of hydrofluoric acid with a concentration of 8.2%, and finally mix with water and stir evenly.

[0032] The method for surface treatment of magnesium alloys with the above cleaning: first place the magnesium alloy castings after the electrochemical deburring treatment in the cleaning solution for 15 seconds at room temperature; then put the magnesium alloys into pure water for 15 seconds ; Then put it into an alkaline solution for 10 seconds, and finally wash it with pure water for 10 seconds, dry it, and send the finished product into the next chemical process.

Embodiment 3

[0034] A cleaning solution for magnesium alloy surface treatment; it consists of the following substances calculated by weight percentage: 6% nitric acid; 40% hydrofluoric acid; the balance is water. First mix the above-mentioned amount of nitric acid with a concentration of 7.8% in every 100 liters of water; then add the above-mentioned amount of hydrofluoric acid with a concentration of 5.2%, and finally mix with water and stir evenly.

[0035] The method for surface treatment of magnesium alloys with the above cleaning: first place the magnesium alloy castings after electrochemical deburring treatment in the cleaning solution for 5 seconds at room temperature; then put the magnesium alloys in pure water for 5 seconds Then put it into the alkaline solution for 5 seconds, and finally wash it with pure water for 5 seconds, dry it, and send the finished product into the next chemical process.

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Abstract

The invention relates to the technical field of magnesium alloy surface treatment, in particular to cleaning liquid used after deburring of magnesium alloy by an electrochemical method, and a treatment method thereof. The cleaning liquid mainly comprises the following ingredients in percentage by weight: 45 to 80 percent of nitric acid and 20 to 55 percent of hydrofluoric acid. The treatment method comprises the following steps: using the cleaning liquid for treatment; sequentially carrying out purified water cleaning, alkali solution treatment, purified water cleaning and final drying; and entering a next forming treatment work procedure. The invention has the advantages of low cost and simple cleaning process; and particularly, the invention has good cleaning effect, and can effectively clean corrosion black dots remained on castings after the electrochemical deburring treatment.

Description

technical field [0001] The invention relates to the technical field of magnesium alloy surface treatment, in particular to a cleaning solution for black corrosion products formed on workpieces of magnesium alloys after electrochemical deburring and a cleaning method thereof. Background technique [0002] Magnesium alloy is an alloy composed of magnesium and other elements. Because it has the following advantages: (1) Although the specific gravity of magnesium alloy is heavier than that of plastic, the strength and elastic modulus per unit weight are higher than that of plastic. Therefore, in the case of parts with the same strength, magnesium alloy parts can Made thinner and lighter than plastic. In addition, since the specific strength of magnesium alloy is also higher than that of aluminum alloy and iron, the weight of aluminum or iron parts can be reduced without reducing the strength of parts. (2) Magnesium alloy has the highest relative strength (ratio of strength to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/12C23G1/22C23G1/24
Inventor 陈太行
Owner 东莞东运镁业有限公司
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