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Surface treatment method of automobile covering parts

A technology for automobile cover and surface treatment, applied in electrophoretic plating, electrolytic paint, coating and other directions, can solve the problems of complex structure, poor degreasing effect and poor anti-corrosion ability of automobile cover, and achieve the best degreasing effect. , Cost saving, anti-corrosion effect improvement effect

Active Publication Date: 2013-05-08
昆山田盛汽车配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For workpieces with relatively thick grease and relatively firm structure, the degreasing effect is relatively poor, resulting in poor corrosion resistance
The structure of automotive panels is complex, and in order to meet the needs of users, the requirements for appearance and corrosion resistance are very high, so it is necessary to develop new metal surface treatment processes to meet market demand

Method used

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  • Surface treatment method of automobile covering parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The automotive covering is a bonnet. The processing steps are:

[0033] 1) Hang and fix the engine cover to be treated, and then carry out spray pre-degreasing, dipping main degreasing and spray degreasing in sequence, and spray pre-degreasing at 6m 3 It is carried out in the spray tank (the first tank), the pressure is 0.12MPa, the temperature is 42°C, the total alkali point is 16, and the time is 60s; the main degreasing is at 30m 3 It is carried out in the immersion tank (the second tank), the spray pressure at the outlet is 0.12MPa, the temperature is 42°C, the total alkali point is 16, and the time is 180s; the degreasing time is 4m 3 It is carried out in the spray tank (the third tank), the pressure is 0.12MPa, the temperature is 42°C, the total alkali point is 16, and the time is 60s.

[0034] The degreasing agent Gardoclean VP4629, Gardoclean V379 / 10M, Gardoclean APR715821 (all purchased from Shanghai Kaimi Tel Chemical Co., Ltd.), the added mass ratio is 3% ...

Embodiment 2

[0045] The car cover is the front fender. The processing steps are:

[0046] 1) Hang and fix the front fender to be treated, and then carry out spray pre-degreasing, dipping main degreasing and spray degreasing in sequence, and the spray pre-degreasing is at 6m 3 It is carried out in the spray tank (the first tank), the pressure is 0.10MPa, the temperature is 44°C, the total alkali point is 16, and the time is 60s; the main degreasing is at 30m 3 It is carried out in the immersion tank (the second tank), the outlet spray pressure is 0.10MPa, the temperature is 44°C, the total alkali point is 16, and the time is 180s; the degreasing time is 4m 3 It is carried out in the spray tank (the third tank), the pressure is 0.12MPa, the temperature is 44°C, the total alkali point is 16, and the time is 60s.

[0047] The degreasing agent Gardoclean VP4629, Gardoclean V379 / 10M, Gardoclean APR715821 are placed in the spray tank (the first tank) / soaking tank (the second tank) / spray tank (t...

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Abstract

The invention provides a surface treatment method of automobile covering parts. The surface treatment method comprises the following steps of: 1) hanging and fixing automobile covering parts to be treated, then carrying out spraying pre-degreasing, dipping main degreasing and spraying degreasing sequentially, and washing with water; 2) carrying out surface conditioning by using a surface conditioning agent, then dipping and phosphatizing, and washing with water; 3) carrying out passivating treatment by using a chromium-free passivating agent, and then washing with water; and 4) carrying out electrophoretic painting, and then washing with water. A three-way degreasing technology of spraying, dipping and spraying is adopted by the scheme of the surface treatment method, so that grease is thoroughly cleaned. Due to a dip technology, the inner cavity of a complex workpiece is also cleaned. A reverse feeding method is adopted by the surface treatment method, and a degreasant of a degreasing work (the third tank) is always kept very fresh, so that the degreasing effect is the best, the utilization rate of the degreasant is also improved, and at the same time, the cost is saved. Due to the implementation of additional degreasing step, grease on the workpiece surface is removed completely, and the binding force of coatings is enhanced, so that the anti-corrosion effect is remarkably improved.

Description

technical field [0001] The invention belongs to the field of metal surface treatment, and in particular relates to a treatment method for reacting a metal surface with a reaction liquid. Background technique [0002] After the metal parts are formed, the surface needs to be treated and then painted to achieve the effect of anti-corrosion and decoration. Different treatment methods achieve different anti-corrosion effects. Generally, the requirements for household appliances are relatively low, and the working environment of cars is relatively poor, exposed to the sun and rain, and splashed with stones, so the anti-corrosion requirements are relatively high, and the general requirements must be ten Years without perforating rust. [0003] The surface of the metal sheet is coated with a layer of anti-rust oil to keep the sheet from rusting. Stretching oil is also added during the stamping process, and some metal sheets are stored for a long time, and the surface oil will be s...

Claims

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Application Information

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IPC IPC(8): C25D13/20C25D13/12
Inventor 朱锦华
Owner 昆山田盛汽车配件有限公司
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