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Nickel-contained polishing agent, aluminum piece and polishing treatment method for aluminum piece

A processing method and polishing agent technology, applied in the field of aluminum parts and their polishing treatment, and nickel-containing polishing agent, can solve the problems of high energy consumption, large gas volatilization, easy cracks and scratches, etc., and achieve high light reflectivity, The effect of low cost and convenient operation

Inactive Publication Date: 2021-04-23
SHENZHEN HONGCHANGFA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional nickel-containing polishing agents generally use mechanical polishing or tri-acid polishing, in which mechanical polishing has a poor polishing effect on workpieces with complex geometric shapes, and is prone to cracks and scratches
The three acids in three-acid polishing, namely concentrated nitric acid, concentrated sulfuric acid, and concentrated phosphoric acid, react violently under high temperature conditions, and the gas volatilizes greatly, which will produce a large amount of NO X Gas, unsafe, highly harmful to the environment, and consumes a lot of energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The ingredients are mixed according to the following parts by weight (the total amount is 100 parts by weight): 3 parts of nitric acid, 0.005 part of copper nitrate, 5 parts of chromic anhydride, 20 parts of phosphoric acid, 5 parts of aluminum phosphate, 0.5 part of nickel nitrate and the balance of water.

[0019] Treatment method: prepare a nickel-containing polishing agent; degrease and descale the aluminum parts in advance, then wash with water, and then immerse the workpiece with a clean surface in the polishing agent solution at 85°C, wash with water after 3 minutes, and dry.

[0020] After being treated with the above polishing agent solution, observe the surface of the workpiece, the entire surface is clean and bright, the color is consistent, and there are no abnormalities such as spots, white fog, and pitting. The specular reflectance is above 40%.

Embodiment 2

[0022] The ingredients are mixed according to the following parts by weight (the total amount is 100 parts by weight): 5 parts of nitric acid, 0.01 part of copper nitrate, 7 parts of chromic anhydride, 30 parts of phosphoric acid, 7 parts of aluminum phosphate, 1 part of nickel nitrate and the balance of water.

[0023] Treatment method: Prepare a nickel-containing polishing agent; degrease and descale the aluminum parts in advance, then wash with water, and then immerse the workpiece with a clean surface in the polishing agent solution at 85°C, wash with water after 2 minutes, and dry.

[0024] After being treated with the above polishing agent solution, observe the surface of the workpiece, the entire surface is clean and bright, the color is consistent, and there are no abnormalities such as spots, white fog, and pitting. The specular reflectance is above 50%.

Embodiment 3

[0026] Mix the components according to the following parts by weight (the total amount is 100 parts by weight): 8 parts of nitric acid, 0.015 parts of copper nitrate, 8 parts of chromic anhydride, 40 parts of phosphoric acid, 10 parts of aluminum phosphate, 2 parts of nickel nitrate and the balance of water.

[0027] Treatment method: Prepare a nickel-containing polishing agent; degrease and descale the aluminum parts in advance, then wash with water, and then immerse the workpiece with a clean surface in the polishing agent solution at 85°C, wash with water after 2 minutes, and dry.

[0028] After being treated with the above polishing agent solution, observe the surface of the workpiece, the entire surface is clean and bright, the color is consistent, and there are no abnormalities such as spots, white fog, and pitting. The specular reflectance is above 60%.

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Abstract

The invention relates to a nickel-contained polishing agent, an aluminum piece and a polishing treatment method for the aluminum piece. The nickel-contained polishing agent is used for pretreating the surface of the aluminum piece and is prepared from the following components in parts by weight: 3-10 parts of nitric acid, 0.005-0.02 part of copper nitrate, 5-10 parts of chromic anhydride, 20-50 phosphoric acid, 5-12 parts of aluminum phosphate, 0.5-3 parts of nickel nitrate and the balance of water. After the aluminum piece treated by the nickel-contained polishing agent, the surface of the aluminum piece is clean and bright; and the whole polishing treatment method is simple in process equipment, capable of treating workpieces with complex shapes, convenient to operate and low in use cost.

Description

technical field [0001] The invention relates to the technical field of iron surface treatment, in particular to a nickel-containing polishing agent, an aluminum piece and a polishing treatment method thereof. Background technique [0002] In order to improve the surface performance or appearance of the product, the surface treatment technology of the workpiece is usually used. For example, the surface treatment process of stainless steel, zinc alloy, aluminum, etc. and their alloys has penetrated into all walks of life. Moreover, most workpieces also need to be pretreated before surface treatment, for example, cleaning, decontamination and oil removal, and metal workpieces for some purposes also need to be polished. [0003] Generally, in the mechanical processing and electrical and electronic industries, aluminum parts are cleaned and brightened, that is, polished. Traditional nickel-containing polishing agents generally use mechanical polishing or tri-acid polishing, in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F3/03
CPCC23F3/03
Inventor 刘国平
Owner SHENZHEN HONGCHANGFA TECH CO LTD