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Metal part anti-rust technology

A technology for metal parts and processes, applied in the field of metal parts rust prevention technology, can solve the problem of short rust prevention time, and achieve the effects of good rust prevention effect, good corrosion resistance and huge market potential.

Active Publication Date: 2016-03-30
台州和兴锻造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the antirust process of metal parts has the problem that the antirust time is not long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An antirust process for metal parts, comprising the steps of:

[0028] (1) Degreasing

[0029] Put the metal parts into the PA30-2M degreasing solution after being polished for immersion degreasing, the temperature of the degreasing is 50°C, and the time of the immersion degreasing is 5 minutes;

[0030] (2) washing

[0031] Then clean the degreased metal parts with water. The cleaning is divided into two steps. The first step is to wash the degreased metal parts with tap water for 2 minutes, and the second step is to wash them twice with deionized water;

[0032] (3) pickling

[0033] The washed metal parts are put into etching acid, soaked at 30°C for 3min, the composition of the etching acid is 300mL / L of HNO3 and 6g / L of NH4HF2 aqueous solution, the total acidity of the etching acid is 55 points;

[0034] (4) Wash again

[0035] Soak the acid-etched metal parts in tap water for 20 minutes, then take them out and wash them twice with running water;

[0036] (5)...

Embodiment 2

[0045] An antirust process for metal parts, comprising the steps of:

[0046] (1) Degreasing

[0047] Put the metal parts into the PA30-2M degreasing solution after being polished for immersion degreasing, the temperature of the degreasing is 55°C, and the time of the immersion degreasing is 6 minutes;

[0048] (2) washing

[0049] Then clean the degreased metal parts with water. The cleaning is divided into two steps. The first step is to wash the degreased metal parts with tap water for 3 minutes, and the second step is to wash them with deionized water for 3 times;

[0050] (3) pickling

[0051] Put the washed metal parts into etching acid and soak for 4.5min at 45°C. The composition of the etching acid is 350mL / L of HNO3 and 7g / L of NH4HF2 aqueous solution. The total acidity of the etching acid is 65 points;

[0052] (4) Wash again

[0053] Soak the acid-etched metal parts in tap water for 25 minutes, then take them out and wash them with running water for 3 times;

...

Embodiment 3

[0063] An antirust process for metal parts, comprising the steps of:

[0064] (1) Degreasing

[0065] Put the metal parts into the PA30-2M degreasing solution after being polished for immersion degreasing, the temperature of the degreasing is 60°C, and the time of the immersion degreasing is 7 minutes;

[0066] (2) washing

[0067] Then clean the degreased metal parts with water. The cleaning is divided into two steps. The first step is to wash the degreased metal parts with tap water for 4 minutes, and the second step is to wash them with deionized water for 4 times;

[0068] (3) pickling

[0069] The washed metal parts are put into etching acid, soaked at 60°C for 6min, the composition of the etching acid is 400mL / L HNO3 and 8g / L NH4HF2 aqueous solution, the total acidity of the etching acid is 75 points;

[0070] (4) Wash again

[0071] Soak the acid-etched metal parts in tap water for 30 minutes, then take them out and wash them 4 times with running water;

[0072] (5)...

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PUM

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Abstract

The invention discloses a metal part anti-rust technology. Cleaning is executed in two steps. On one hand, degreasing fluid can be washed out, and on the other hand, influences of other ions on the surface of steel to film formation can be removed. According to the composition and ratio and the preparing method of a phosphating solution, a phosphating film formed by phosphating of a metal part is ideal in anti-rust effect, and the application prospect is wide. Saponification treatment is carried out after passivation, the long-term anti-rust and anti-corrosion effects can be achieved, the anti-rust technology is adopted, the beneficial effects of being good in anti-rust effect and good in corrosion resistance are achieved, the market potential is giant, and the prospect is wide.

Description

technical field [0001] The invention belongs to the field of antirust treatment, and more specifically, the invention relates to an antirust process for metal parts. Background technique [0002] Anti-rust phosphating is a phosphating treatment process for the purpose of anti-rust. It belongs to thick film phosphating with a film thickness of 10-20um and a film weight of 10-30g / m2; the film thickness of blue (oxidized) steel parts is only 0.5-1.5um, so the anti-rust performance of the anti-rust phosphating film far exceeds that of the oxide film on steel parts. At present, the anti-rust process of metal parts has the problem that the anti-rust time is not long. Contents of the invention [0003] The problem to be solved by the present invention is to provide an antirust process for metal parts. [0004] In order to achieve the above object, the technical scheme that the present invention takes is: [0005] An antirust process for metal parts, comprising the steps of: ...

Claims

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Application Information

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IPC IPC(8): C23C22/34C23C22/78C23C22/83
Inventor 郑臣钏
Owner 台州和兴锻造有限公司
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