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Surface treating method of stainless steel shell

A surface treatment, stainless steel technology, applied in the direction of metal material coating process, etc., can solve the problems of dust and toxic gas generation, poor appearance quality, long processing cycle, etc., and achieve the effect of strong anti-fouling, low cost, and short cycle

Inactive Publication Date: 2009-05-06
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The processing cycle is long, the appearance quality is poor, and a lot of dust and toxic gas are generated during the processing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Use acidic solution to remove oil: the composition and formula of the solution are: 48g / L alkylphenol polyoxyethylene ether, 8g / L thiourea and 20g / L sulfuric acid. The temperature of the solution is 60°C. 15min in the solution.

[0021] (2) Rinse with running water.

[0022] (3) Liquid shot peening: glass beads: water = 1:5 (mass ratio), mixed with hexamethylenetetramine 10g / L and shot peened, spray angle 30°~40°, spray distance 80mm~90mm, Compressed air pressure 0.5Mpa.

[0023] In order to make the surface of the stainless steel shell uniform, the nozzle or the stainless steel shell should be moved at a constant speed, and the cross-spraying should be performed longitudinally and then horizontally. The spraying time depends on the spraying speed, and finally the surface meets the requirements.

[0024] (4) Wash with water.

[0025] (5) Passivation: Put the stainless steel shell in a concentrated nitric acid solution with a concentration of 300g / L and soak for 1...

Embodiment 2

[0031] (1) Use acidic solution to remove oil: the composition and formula of the solution are: triethanolamine oleic acid soap 55g / L, thiourea 12g / L and sulfuric acid 30g / L, the solution temperature is 80°C, soak the stainless steel shell in the above solution .

[0032] (2) Wash with water.

[0033] (3) Liquid shot peening: glass beads: water = 1:8 (mass ratio), mixed with thiourea 15g / L and shot peened, spray angle 60-70°, spray distance 110-120mm, compressed air pressure 0.6Mpa .

[0034] In order to make the surface of the stainless steel shell uniform, the nozzle or the stainless steel shell should be moved at a constant speed and cross sprayed longitudinally and then horizontally. The spraying time depends on the spraying speed, and finally the surface meets the requirements.

[0035] (4) Wash with water.

[0036] (5) Passivation: Put the stainless steel shell in a concentrated nitric acid solution with a concentration of 350g / L and soak for 15 minutes.

[0037] (6) ...

Embodiment 3

[0042] (1) Use acidic solution to remove oil: the composition and formula of the solution are: dodecyldiethanolamine 50g / L, thiourea 10g / L and sulfuric acid 25g / L, the solution temperature is 70°C, soak the stainless steel shell in the above solution middle.

[0043] (2) Rinse with flowing water.

[0044] (3) Liquid shot peening: glass beads: water = 1:7 (mass ratio), mixed with aniline 13g / L and then shot peened, with a spray angle of 50-60°, a spray distance of 100-120mm, and a compressed air pressure of 0.6Mpa.

[0045] In order to make the surface of the stainless steel shell uniform, the nozzle or the stainless steel shell should be moved at a constant speed and cross sprayed longitudinally and then horizontally. The spraying time depends on the spraying speed, and finally the surface meets the requirements.

[0046] (4) Rinse with flowing water.

[0047] (5) Passivation: Put the stainless steel shell in a dilute chromic anhydride solution with a concentration of 5g / L-5...

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Abstract

The invention solves a technical problem of providing a stainless steel shell surface treatment method having short processing period, nontoxic processing and a beautiful shell after treatment. The stainless steel shell surface treatment method comprises the following: (1) a step of liquid shot blast, in which glass microballoons and water are mixed with a 10 to 15g / L corrosion inhibitor for shot blast according to a principle that the ratio of the microballoons to the water is between 1 to 5 and 1 to 8; (2) a step of passivation, in which a stainless steel shell is soaked in a 300 to 350g / L concentrated nitric acid or a 5 to 50 g / L dilute solution of chromic anhydride; and (3) sealing, in which confining liquid is spread on the surface of the stainless steel shell and then dried. The method has cost lower than that of the prior surface treatment technique and can effectively remove scale generated during welding; the appearance of the stainless steel shell is a mat surface which is fine and elegant and has strong dirt resistance and prevents hands touching the surface from leaving impression; and the process does not generate toxic substances and is good for health and environment protection. The method is particularly suitable for surface treatment of stainless steel shells of storage batteries.

Description

technical field [0001] The invention relates to a surface treatment method, in particular to a surface treatment method for a stainless steel shell. Background technique [0002] At present, the surface treatment method of the stainless steel shell of many products is mostly sandblasting first, and then spraying varnish. The processing cycle is long, the appearance quality is poor, and a lot of dust and toxic gas are generated during the processing. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a surface treatment method for a stainless steel shell, which has a short processing period, no poisonous harm in the processing process, and the treated shell is beautiful. [0004] The technical solution adopted by the present invention to solve the technical problem is: the surface treatment method of the stainless steel shell, which method comprises the following steps: [0005] (1) Liquid shot peening: glass beads...

Claims

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Application Information

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IPC IPC(8): C23F17/00B24C1/08C23C22/50C23C22/24
Inventor 张建旭
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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