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Formula of magnesium alloy surface washing liquid

A technology for whitening liquid and magnesium alloy, which is applied to the field of formulating whitening liquid on the surface of magnesium alloys, can solve the problems of insufficient cleaning, long time consumption, waste of manpower and material resources, etc., and achieves the effect of fast whitening speed and reduction of production costs.

Active Publication Date: 2012-07-04
MITAC PRECISION TECH(KUNSHAN) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the magnesium alloy is relatively active, it is easy to produce a layer of pickling residue on the surface of the workpiece after etching, which will bring difficulties to the post-processing, and it will affect the appearance of the product surface, and the etched part becomes microscopic due to the reaction with strong acid. There are differences between the unevenness and the unetched part, so by performing the whitening process, the difference between them can be reduced, and a surface with a relatively uniform surface state can be provided for post-processing. Most of the current whitening methods are manually wiped with a rag or brush to remove the pickling residue after etching. This method wastes a lot of manpower and material resources, takes a long time, and the removal is not clean enough.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Prepare the whitening solution according to the following formula:

[0014] Phosphoric acid (85%) 90%;

[0015] 6-Hexamethylenetriaminepentamethylenephosphonic acid 0.02%;

[0016] Water 9.98%.

[0017] In this example, using the whitening solution at a temperature of 15-25°C, the whitening method is soaked, and the acid mud and oxides on the surface of the magnesium alloy can be quickly washed away within 30 seconds. , to obtain magnesium alloy products with bright white appearance and uniform color, and also provide a uniform surface for the post-treatment of magnesium alloys.

Embodiment 2

[0019] Prepare the whitening solution according to the following formula:

[0020] Phosphoric acid (85%) 40%;

[0021] Aminotrimethylene phosphonic acid 0.02%;

[0022] Water 59.98%.

[0023] In this example, using the whitening solution at a temperature of 15-25°C, the whitening method is soaked, and the acid mud and oxides on the surface of the magnesium alloy can be quickly washed away within 20 seconds of whitening. , to obtain magnesium alloy products with bright white appearance and uniform color, and also provide a uniform surface for the post-treatment of magnesium alloys.

Embodiment 3

[0025] Prepare the whitening solution according to the following formula:

[0026] Phosphoric acid (85%) 99%;

[0027] Hydroxyethylidene diphosphonic acid 0.02%;

[0028] Water 0.98%.

[0029] In this embodiment, the phosphoric acid (85%) is phosphoric acid used in industry (other concentrations of phosphoric acid are used in other embodiments), and the whitening solution is used at a washing temperature of 15-25° C., and the whitening method is soaked. , within 20 seconds of whitening, the acid mud and oxides on the surface of the magnesium alloy can be quickly washed away, and a magnesium alloy product with a bright white appearance and uniform color can be obtained, and it can also provide a uniform structure for the post-treatment of the magnesium alloy s surface.

[0030] In addition, in other embodiments, the complexing agent of the present invention can also be phosphonic acid butane-1,2,4-tricarboxylic acid, 2-hydroxyphosphonoacetic acid, 2-phosphonic acid butane-1,...

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PUM

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Abstract

The invention relates to a formula of a magnesium alloy surface washing liquid, which mainly comprises the following components of: 40-99% of phosphoric acid, 0.01-0.1% of complexing agent and 0.9-59.99% of solvent. Using the formula to clean the surface of a magnesium alloy product can increase washing speed, shorten washing time, save labor hour and lower production cost; the raw materials for the formula have low harm to operators; and the formula can quickly wash away acid mud and oxides on the surface of a magnesium alloy to obtain the magnesium alloy product with brilliant white and uniform color, and simultaneously provide the surface with a uniform structure for the post-treatment of the magnesium alloy.

Description

【Technical field】 [0001] The invention relates to a formula of whitening liquid for magnesium alloy surface, in particular to a formula of whitening liquid for magnesium alloy surface after etching. 【Background technique】 [0002] At present, magnesium alloys are widely used, including motorcycles, portable hand tools, camera parts and notebook casings. There are already many companies producing magnesium alloy notebook casings in China, and the production volume is relatively large. This is due to the advantages of magnesium alloys such as lightness and recyclability. With the development of the times, lightweight magnesium alloy products will be more widely used. [0003] Since the magnesium alloy is relatively active, it is easy to produce a layer of pickling residue on the surface of the workpiece after etching, which will bring difficulties to the post-processing, and it will affect the appearance of the product surface, and the etched part becomes microscopic due to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/12
Inventor 杨升攀郭雪梅
Owner MITAC PRECISION TECH(KUNSHAN) CORP
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