Rust remover for steel precise components and rust removing technology

A technology of precision parts and rust remover, applied in the direction of metal material coating process, etc., can solve the problems of easy corrosion, influence on the surface of steel precision parts, affecting the surface gloss and precision of steel precision parts, etc., and achieves simple process and rust removal. good effect

Inactive Publication Date: 2014-07-09
徐一达
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Problems solved by technology

[0002] Steel precision parts are very easy to corrode in humid and atmospheric environments. In order to solve or reduce corrosion, chemical methods are usually used in industr...

Method used

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Examples

Experimental program
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Embodiment

[0013] A kind of derusting agent and derusting process for steel precision parts, the following ingredients are mixed according to weight percentage: 15% of chromic anhydride, 15-17% of phosphoric acid, 1-1.2% of sulfuric acid, and 66.8-69% of water; Weigh, add in sequence, and stir evenly to make a rust remover solution:

[0014] Rust removal steps:

[0015] (1) Clean and degrease the precision steel parts with gasoline or acetone.

[0016] (2) Immerse the cleaned and degreased steel precision parts in the rust remover solution, and heat to 80-90°C for about 30-40 minutes.

[0017] (3) Take the steel precision parts out of the rust remover solution and rinse them with tap water for 1 minute, then immerse them in 0.5% sodium carbonate aqueous solution for about 5 minutes.

[0018] (4), take out the precision parts of steel from the sodium carbonate aqueous solution, immerse in the passivation solution that is made up of 50% 10% sodium nitrite aqueous solution and 50% 0.5% so...

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PUM

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Abstract

The invention relates to a rust remover for steel precise components and a rust removing technology. The rust remover is composed of the following compositions in percent by weight: 15% of chromic anhydride, 15-17% of phosphoric acid, 1-1.2% of sulfuric acid and 66.8-69% of water. The rust removing technology comprises: immersing a steel precise component subjected to cleaning and oil removing into a solution of the rust remover, heating to 80-90 DEG for about 30-40 min; taking out and flushing with tap water for 1 min, and then immersing in a sodium carbonate aqueous solution with a concentration of 0.5% for about 5 min; taking out and immersing in a passivating solution composed of a sodium nitrite aqueous solution with a concentration of 10% and a sodium carbonate aqueous solution with a concentration of 0.5% according to a ratio of 50%:50%, heating to 80-90 DEG C for about 5-10 min; and taking the steel precise component out from the passivating solution, and flushing with tap water, wiping to dry and sealing with oil. The beneficial effects comprise that the technology is simple, and the rust remover has no any influence on dimension, shape, surface glossiness and precision on the steel precise component, and is good in ruse removing effect.

Description

technical field [0001] The invention relates to a derusting agent and derusting process for steel precision parts. Background technique [0002] Steel precision parts are very easy to corrode in humid and atmospheric environments. In order to solve or reduce corrosion, chemical methods are usually used in industry to remove rust. Most chemical rust removal methods can remove rust, but they will affect the surface of steel precision parts. The gloss and precision of the surface of steel precision parts. Contents of the invention [0003] The object of the present invention is to address the deficiencies of the prior art, and provide a rust remover and rust removal process for steel precision parts with simple process, no influence on surface gloss and precision, and good derusting effect. [0004] The technical solution adopted in the present invention: a derusting agent and derusting process for steel precision parts, characterized in that: the derusting agent is composed...

Claims

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Application Information

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IPC IPC(8): C23G1/08C23C22/68
Inventor 徐一达
Owner 徐一达
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