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Barrel plating method of trivalent color zinc

A trivalent color zinc and product technology, applied in the field of electroplating, can solve the problems of low oil rust, too much residue on the product surface, and increase the operation process, so as to achieve the effects of consistent color, reduced production cost, and simple process flow

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 impurities on its surface, now it is mostly alkaline cleaning and then pickling. This is for products with a lot of oil on the surface, but most of the electroplated products are new products. The degree of grease and rust is not high. Therefore, this operation is more troublesome and increases the operation process. At the same time, it increases the burden of cleaning later, and it is easy to leave too much residual liquid on the surface of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The barrel plating method of trivalent colored zinc comprises the following steps:

[0024] The first step, thermal degreasing: put the product to be treated in the cleaning tank, heat the cleaning tank, and pass air into the cleaning tank for stirring, wherein the temperature in the cleaning tank is 60°C, and the cleaning time is 1min ;

[0025] The second step, pickling: immerse the product in acid degreasing liquid for 1 min to remove oil, then wash it with water, then put the product in a vacuum chamber for vacuuming, and introduce inert gas, the vacuum degree is 10MPa, and the acid degreasing The solution includes hydrochloric acid, sodium alkylaniline sulfonate and thiourea, the concentration of hydrochloric acid is 800mL / L, the concentration of sodium alkylaniline sulfonate is 48g / L, and the concentration of thiourea is 10 g / L;

[0026] The third step, electroplating: at normal temperature, put the product into the electroplating tank for electroplating zinc lay...

Embodiment 2

[0032] The barrel plating method of trivalent colored zinc comprises the following steps:

[0033] The first step, thermal degreasing: put the product to be treated into the cleaning tank, heat the cleaning tank, and pass air into the cleaning tank for stirring, wherein the temperature in the cleaning tank is 80 °C, and the cleaning time is 1.5 min;

[0034] The second step, pickling: immerse the product in the acid degreasing liquid to remove oil for 2 minutes, then wash it with water, then put the product in the vacuum chamber for vacuuming, and pass inert gas, the vacuum degree is 11MPa, the acid degreasing liquid Including hydrochloric acid, sodium alkylaniline sulfonate and thiourea, the concentration of hydrochloric acid is 850mL / L, the concentration of sodium alkylaniline sulfonate is 48.5g / L, and the concentration of thiourea is 11 g / L;

[0035] The third step, electroplating: at normal temperature, put the product into the electroplating tank for electroplating zinc ...

Embodiment 3

[0041] The barrel plating method of trivalent colored zinc comprises the following steps:

[0042] The first step, thermal degreasing: put the product to be treated into the cleaning tank, heat the cleaning tank, and pass air into the cleaning tank for stirring, wherein the temperature in the cleaning tank is 100°C, and the cleaning time is 2 min;

[0043] The second step, pickling: immerse the product in the acid degreasing liquid to remove oil for 3 minutes, then wash it with water, then put the product in the vacuum chamber for vacuuming, and introduce inert gas, the vacuum degree is 12MPa, the acid degreasing liquid includes Hydrochloric acid, sodium alkylaniline sulfonate and thiourea, the concentration of hydrochloric acid is 900mL / L, the concentration of sodium alkylaniline sulfonate is 49g / L, and the concentration of thiourea is 12g / L;

[0044] The third step, electroplating: at normal temperature, put the product into the electroplating tank for electroplating zinc l...

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PUM

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Abstract

The invention relates to the field of electroplating, in particular to a barrel plating method of trivalent color zinc. The barrel plating method comprises the steps of step I, carrying out thermal degreasing; step II, carrying out pickling; step III, carrying out electroplating; step IV, carrying out bright dipping; step V, carrying out trivalent color zinc plating; step VI, cleaning with hot water; and step VII, placing a treated product in a tray. According to the barrel plating method, a new product is subjected to oil removing and derusing through clean water cleaning and pickling, the technological process is reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of electroplating, in particular to a barrel 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 barrel plating, in order to give better protection to the product, copper is often plated on it. At the same time, the general process flow of the electroplating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22C25D5/34C25D5/52C23G1/02C25D5/10C25D5/48
CPCC25D3/22C23G1/02C25D5/10C25D5/34C25D5/48C25D5/52
Inventor 何令
Owner CHONGQING PENGLEI AUTO PARTS CO LTD
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