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Part electrophoretic coating process

A technology of electrophoretic coating and process, applied in the direction of electrolytic coating, electrophoretic plating, coating, etc., to achieve the effect of improving adhesion performance, quality, and adhesion

Inactive Publication Date: 2019-06-14
TONGWEI PRECISION COATING SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing process still needs to be further improved in the process of processing

Method used

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Examples

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Comparison scheme
Effect test

Embodiment Construction

[0046] The following examples describe the present invention in detail.

[0047] An electrophoretic coating process for parts, including a pretreatment process and an electrophoretic treatment process;

[0048] The pretreatment process includes the following treatment steps in sequence: degreasing treatment, phosphating treatment and passivation treatment;

[0049] The degreasing process includes the following steps in sequence:

[0050]S01, pre-degreasing spray treatment, the degreasing liquid is sprayed on the surface of the auto parts through the spraying device for pre-degreasing spraying treatment, and the spraying device adopts the method of spraying room and circulating spraying. The degreasing liquid is made of degreasing agent mixed with water, the free alkalinity of the degreasing liquid is 20-30pt, the temperature of the degreasing liquid is 35-45°C, the spray pressure is 0.06-0.1Mpa, and the spraying time is 2min;

[0051] SO2, degreasing and soaking treatment, i...

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Abstract

The invention relates to the technical field of surface treatment, in particular to a part electrophoretic coating process. According to the technical scheme, the part electrophoretic coating processis mainly characterized by comprising a pretreatment working procedure and an electrophoretic treatment working procedure, wherein the pretreatment working procedure sequentially comprises the following treatment steps of degreasing treatment, phosphating treatment and passivation treatment, the degreasing treatment sequentially comprises the following steps of pre-degreasing spraying treatment, degreasing soaking treatment and main degreasing spraying treatment, the phosphating treatment sequentially comprises the following steps of surface adjusting spraying treatment and phosphate soaking treatment, the passivation treatment sequentially comprises the following steps of passivation soaking treatment, first-time pure water spraying treatment and second-time pure water spraying treatment,and the electrophoretic treatment working procedure sequentially comprises the following treatment steps of anodic electrophoretic treatment, ultrafiltration recovery treatment, pure water soaking treatment and pure water spraying treatment. The part electrophoretic coating process has the advantage of improving the electrophoretic coating quality of automobile parts.

Description

technical field [0001] The invention relates to the technical field of surface treatment, more specifically, it relates to an electrophoretic coating process for parts. Background technique [0002] At present, the surface treatment processes of auto parts mainly include blackening, electroplating and electrophoresis, and because blackening and electroplating usually do not meet the salt spray test standards stipulated by automobile factories, most of the auto parts supplied to automobile factories are processed by electrophoresis. Surface treatment, electrophoresis is divided into anodic electrophoresis and cathodic electrophoresis. [0003] In the existing electrophoretic process, on the premise of pursuing lower energy consumption and lower pollution, it is the goal that those skilled in the art are constantly pursuing to improve the paint adhesion rate of electrophoretic paint and improve the salt spray resistance. The existing technology still needs to be further impro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D13/00C25D13/20C25D13/24
Inventor 吴梓正
Owner TONGWEI PRECISION COATING SHANGHAI
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