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Magnesium product and its film plating method

A product and coating technology, applied in the field of magnesium products and magnesium product coating, can solve problems such as damage to the appearance of products

Inactive Publication Date: 2007-09-26
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ceramic film formed by this method is a magnesia ceramic film, and its color is white. For products whose appearance is required to be black, it needs to be painted again. After the product wears off the paint, the white ceramic film is exposed, which damages the appearance of the product.

Method used

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  • Magnesium product and its film plating method
  • Magnesium product and its film plating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Sodium hydroxide 25g / l

[0019] Sodium silicate 1g / l

[0020] Potassium fluoride 10g / l

[0021] Copper pyrophosphate 4g / l

[0022] Nickel nitrate 0.1g / l

[0023] Sodium citrate 8g / l

[0024] Thiourea 1g / l

[0025] Temperature: 35°C;

[0026] Coating film thickness of magnesium products is 10μm, black.

Embodiment 2

[0028] Sodium hydroxide 13g / l

[0029] Sodium silicate 8g / l

[0030] Potassium fluoride 13g / l

[0031] Copper pyrophosphate 1.8g / l

[0032] Nickel nitrate 0.1g / l

[0033] Sodium citrate 5g / l

[0034] Thiourea 0.1g / l

[0035] Temperature: 25°C;

[0036] Magnesium products coated film thickness 14μm, black.

Embodiment 3

[0038] Potassium hydroxide 2g / l

[0039] Sodium silicate 35g / l

[0040] Potassium fluoride 1g / l

[0041] Copper pyrophosphate 6g / l

[0042] Nickel nitrate 0.1g / l

[0043] Disodium EDTA 3g / l

[0044] Hexatropine 0.1g / l

[0045] Temperature: 60°C;

[0046] The coating film thickness of magnesium products is 14μm, and the black is slightly reddish.

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Abstract

The invention discloses a coating method of magnesium product, which comprises the following steps: immersing base as anode into electrolyte with basic liquid, blackening agent and complex builder; immersing the other metal as cathode in the electrolyte; adding pressure and discharging to form black coating between two electrodes.

Description

【Technical field】 [0001] The invention relates to a magnesium product and a coating method for the magnesium product. 【technical background】 [0002] Magnesium alloy materials have been widely used in industry because of their small specific gravity, excellent electromagnetic shielding performance, and suitable for mass production of die-casting. However, due to the active chemical properties of magnesium and magnesium alloy materials, magnesium products must be treated with appropriate surface protection to improve the corrosion resistance and wear resistance of the surface of magnesium alloy materials. [0003] Therefore, at present the industry has adopted magnesium alloy micro-arc oxidation technology to coat magnesium alloy materials, such as a kind of coating method for magnesium products disclosed in Chinese Patent Application No. 86108405 and used electrolyte, which adopts alkali metal silicate (such as Potassium silicate), alkali metal hydroxide (such as potassium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/30
CPCC25D11/30
Inventor 罗忠无林军简琳彭铁强
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD