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Rack plating method of trivalent color zinc

A trivalent color zinc and product technology, applied in the field of electroplating, can solve the problems of poor degreasing and rust removal, easy generation of bubbles, thick rust and other problems, and achieve the effect of consistent color, convenient electroplating, and reduced residue

Inactive Publication Date: 2016-11-09
CHONGQING PENGLEI AUTO PARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, since the product needs to be cleaned at the beginning to remove the impurities on its surface, now it is mostly used to wash with alkali and then pickle. However, for old products, the surface oil is very thick and the degree of rust is serious. degreasing and derusting methods, the effect is not good, it is easy to cause uneven coating of the product, and it is easy to generate air bubbles; at the same time, the products using rack plating are mostly large-sized items, which are only processed through the above process, degreasing and degreasing Rust doesn't work well

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The rack plating method of trivalent colored zinc comprises the following steps:

[0028] The first step, heat degreasing: put the product to be treated into the lye tank, heat the lye tank, and pass air into the lye tank for stirring, wherein the temperature in the lye tank is 40°C, The degreasing time is 12min, and the lye concentration in the lye tank is 40g / IL;

[0029] The second step, initial electrolytic degreasing: put a voltage of 5V into the above-mentioned lye tank, and perform preliminary electrolytic degreasing treatment on the product. The electrolytic degreasing time is 6 minutes, and then put the product into the cleaning tank for cleaning;

[0030] The third step, ultrasonic degreasing: put the product in a lye tank with a concentration of 10g / IL, and use ultrasonic waves to process the remaining oil on the product. The temperature in the lye tank is 40°C, and the degreasing time is 6min. The product is placed in the cleaning tank to clean the residual...

Embodiment 2

[0039] The rack plating method of trivalent colored zinc comprises the following steps:

[0040] The first step, thermal degreasing: put the product to be treated into the lye tank, heat the lye tank, and pass air into the lye tank for stirring, wherein the temperature in the lye tank is 50°C, The degreasing time is 14min, and the lye concentration in the lye tank is 50g / IL;

[0041] The second step, initial electrolytic degreasing: put a voltage of 6V into the above-mentioned lye tank, and perform preliminary electrolytic degreasing treatment on the product. The electrolytic degreasing time is 7 minutes, and then put the product into the cleaning tank for cleaning;

[0042] The third step, ultrasonic degreasing: put the product in a lye tank with a concentration of 15g / IL, and use ultrasonic waves to process the remaining oil on the product. The temperature in the lye tank is 50°C, and the degreasing time is 7 minutes. The product is placed in the cleaning tank to clean the ...

Embodiment 3

[0051] The rack plating method of trivalent colored zinc comprises the following steps:

[0052] The first step, thermal degreasing: put the product to be treated into the lye tank, heat the lye tank, and pass air into the lye tank for stirring, wherein the temperature in the lye tank is 60°C, The degreasing time is 16min, and the lye concentration in the lye tank is 60g / IL;

[0053] The second step, initial electrolytic degreasing: put a voltage of 7V into the above-mentioned lye tank, and perform preliminary electrolytic degreasing treatment on the product. The electrolytic degreasing time is 8 minutes, and then put the product into the cleaning tank for cleaning;

[0054] The third step, ultrasonic degreasing: put the product in a lye tank with a concentration of 20g / IL, and use ultrasonic waves to process the remaining oil on the product. The temperature in the lye tank is 60°C, and the degreasing time is 8 minutes. Put the product into the cleaning tank to clean the resi...

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PUM

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Abstract

The invention relates to the field of electroplating, in particular to a rack plating method of trivalent color zinc. The rack plating method comprises the steps of step I, carrying out thermal degreasing; step II, carrying out primary electrolytic degreasing; step III, carrying out ultrasonic degreasing; step IV, carrying out pickling; step V, carrying out last-stage electrolysis; step VI, carrying out electroplating; step VII, carrying out bright dipping; step VIII, carrying out trivalent color zinc plating; step IX, cleaning with hot water; and step X, placing a treated product in a tray. According to the rack plating method, surface treatment is carried out on a product which has thick grease and is high in rusting degree through combination of thermal degreasing, primary electrolytic degreasing, ultrasonic degreasing and final last-stage electrolysis, the effect is good, and after the product is electroplated, bubbles are avoided.

Description

technical field [0001] The invention relates to the field of electroplating, in particular to a rack plating method for trivalent colored zinc. Background technique [0002] In the process of industrial production of parts, it is often necessary to plate a thin layer of metal on its surface to improve the anti-corrosion effect of the parts, as well as the wear resistance, conductivity, reflectiveness and aesthetics of the parts. Electroplating is usually divided into rack plating, barrel plating, continuous plating and brush plating, which are mainly related to the size and batch size of the parts to be plated. Rack plating is suitable for general-sized products, such as car bumpers, bicycle handlebars, etc. Barrel plating is suitable for small parts such as fasteners, washers, pins, etc. [0003] Among them, in order to better protect the product in rack plating, galvanization is often performed on it. At the same time, the formula process of general aluminum electroplati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22C25D5/34C25D5/52C25D5/10C25D5/48
CPCC25D3/22C25D5/10C25D5/34C25D5/48C25D5/52
Inventor 何令
Owner CHONGQING PENGLEI AUTO PARTS CO LTD
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