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Microarc-oxidation electrophoretic-coating composite processing method of surface of Q 235 steel part

A technology of micro-arc oxidation and electrophoretic coating, applied in the direction of anodic oxidation, electrolytic coating, electrophoretic plating, etc., can solve the problems of complex electrolyte formula, complex process, small mass production, etc. The effect of high process efficiency and low production cost

Inactive Publication Date: 2012-06-13
HOHAI UNIV CHANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the Chinese patent CN200510010012.3 applies micro-arc oxidation technology to the treatment of steel surfaces, the electrolyte formula for micro-arc oxidation is complicated, the cost is high, and the process is complicated, and the mass production may be small

Method used

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  • Microarc-oxidation electrophoretic-coating composite processing method of surface of Q 235 steel part
  • Microarc-oxidation electrophoretic-coating composite processing method of surface of Q 235 steel part
  • Microarc-oxidation electrophoretic-coating composite processing method of surface of Q 235 steel part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The pre-treatment method of Q235 steel is to use No. 400 to No. 1200 water sandpaper to polish in sequence, and then use 20g / L NaOH, 15g / L NaOH 2 CO 3 , 1 drop of OP-10 emulsifier prepared by alkaline washing solution for degreasing and degreasing for 5 minutes, and then use 3% H 2 SO 4 , the activation solution prepared by 7% HCL was activated for 10 minutes, and then micro-arc oxidation was performed in a specific proportion of aluminate electrolyte at 35°C for 10 minutes, the termination voltage was 170V, the frequency was 172Hz, the base value time was 2.99, and the current density was 3A / dm 2 .

[0024] The specific ratio aluminate electrolyte consists of (weight content per unit volume):

[0025]

[0026] The Q235 steel after micro-arc oxidation was cleaned with tap water and distilled water. After cleaning in an ultrasonic cleaner for 8 minutes, it was transferred to HED-5000 red epoxy cathodic electrophoretic paint with a pH value of 5.90 for 3 seconds, st...

Embodiment 2

[0031] The pre-treatment method of Q235 steel is to use No. 400 to No. 1200 water sandpaper to polish sequentially, using 15g / L NaOH, 25g / L NaOH 2 CO 3 , 4 drops of OP-10 emulsifier made of alkali washing solution for degreasing and degreasing for 5 minutes, and then use 8% H 2 SO 4 , the activation solution prepared by 12% HCL was activated for 13 minutes, and then micro-arc oxidation was performed in a specific proportion of aluminate electrolyte at 25°C for 30 minutes, the termination voltage was 207V, the frequency was 172Hz, the base value time was 2.99, and the current density was 2A / dm 2 .

[0032] The specific ratio aluminate electrolyte consists of (weight content per unit volume):

[0033]

[0034] After micro-arc oxidation, the Q235 steel was cleaned with tap water and distilled water, put into an ultrasonic cleaner for 8 minutes, then transferred to HED-5000 sky blue epoxy cathodic electrophoretic paint with a pH value of 5.90 for 10 seconds, stirred for 8 se...

Embodiment 3

[0039] The pre-treatment method of Q235 steel is to use No. 400 to No. 1200 water sandpaper to polish sequentially, using 30g / LNaOH, 20g / L NaOH 2 CO 3 , 2 drops of OP-10 emulsifier made of alkali washing solution to degrease and degrease for 10 minutes, and then use 6.5% H 2 SO 4, the activation solution prepared by 8% HCL was activated for 10 minutes, and then micro-arc oxidation was performed in a specific ratio of aluminate electrolyte at 25°C for 60 minutes, the termination voltage was 246V, the frequency was 172Hz, the base value time was 2.99, and the current density was 1.5A / dm 2 .

[0040] The specific ratio aluminate electrolyte consists of (weight content per unit volume):

[0041]

[0042] The Q235 steel after micro-arc oxidation was cleaned with tap water and distilled water, put it in an ultrasonic cleaner for 8 minutes, then transferred to HED-5000 purple epoxy cathodic electrophoretic paint with a pH value of 5.90 for 20 seconds, stirred for 10 seconds, an...

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Abstract

The invention discloses a microarc-oxidation electrophoretic-coating composite processing method of the surface of a Q 235 steel part, comprising the following step of: sequentially carrying out microarc-oxidation processing, surface cleaning processing and electrophoretic-coating processing on the Q 235 steel part with the surface cleaned, wherein cleaning and drying processing is a principal character after coating. The invention has good process property, lower production cost, good quality of finished products, and the like.

Description

technical field [0001] The invention relates to a composite treatment method for micro-arc oxidation electrophoretic coating on the surface of Q235 steel parts, which belongs to the surface treatment technology of metal materials. Background technique [0002] Due to its high strength, high toughness, easy processing, and low cost, Q235 steel has become the most widely used metal material in the fields of automobiles, aviation, and national defense. But its biggest disadvantage is that it is easy to rust and wear, which not only causes huge economic losses, but also limits its application in the industrial field. [0003] At present, the commonly used methods for surface treatment of such steel are: phosphating treatment, chemical conversion coating treatment, electroplating treatment, etc. The treatment method not only has high cost, but also seriously pollutes the environment and is harmful to human health. [0004] The micro-arc oxidation / electrophoretic coating composi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/34C25D13/04
Inventor 杨华山包晔峰蒋永锋
Owner HOHAI UNIV CHANGZHOU
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