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A kind of method for preventing electroplated pearl nickel product from whitish

A pearl nickel and product technology, applied in the field of physical chemistry, to achieve the effect of improving the completeness of the reaction, reducing the phenomenon of whitening, and improving the reactivity

Active Publication Date: 2016-02-24
延康汽车零部件如皋有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of method that prevents electroplated pearl nickel product from turning white, by controlling the pH of electroplating solution, to solve the unresolved problem in above-mentioned prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] First, use a pH meter to measure the pH value of the semi-bright nickel plating solution in the pearl nickel process. According to the measurement, the measured pH is 3.6. After adding 680ml of dilute sulfuric acid, measure again, and the measured pH is 3.5. After degreasing, roughening, recycling , two reductions, palladium activation, degumming, electroless nickel plating, pre-copper plating, copper plating, acid activation and semi-bright nickel plating. The semi-finished product is placed in a pearl nickel cylinder for pearl nickel plating, and then chrome plating, reduction, and ultraviolet sterilization , wind cutting and drying processes to form products. After inspection, there is no whitening phenomenon on the surface of the product, and the authenticity rate of the obtained product is 96%.

Embodiment 2

[0014] First utilize the pH meter to measure the pH value of the semi-bright nickel plating solution in the pearl nickel process, according to the measured pH of 3.7, add 780ml dilute sulfuric acid, measure again, the measured pH is 3.5, carry out electroplating according to the method described in embodiment 1 . After inspection, there is no whitening phenomenon on the surface of the product, and the authenticity rate of the obtained product is 96%.

Embodiment 3

[0016] First utilize the pH meter to measure the pH value of the semi-bright nickel plating solution in the pearl nickel process, according to the surveyed pH is 3.6, add 730ml dilute sulfuric acid, measure again, the surveyed pH is 3.4, carry out electroplating according to the method described in embodiment 1 . After inspection, there is no whitening phenomenon on the surface of the product, and the authenticity rate of the obtained product is 96%.

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Abstract

The invention discloses a method for preventing the whitening of electroplated pearl nickel products, including degreasing, coarsening, recycling, two reductions, palladium activation, degumming, electroless nickel plating, pre-plating copper, copper plating, acid activation, plating Semi-bright nickel, pearl nickel plating, chrome plating, reduction, ultraviolet sterilization, wind cutting and drying process, in which the previous process is washed into the next process, before the pearl nickel plating process, adjust the pH of the semi-bright nickel plating solution The value is controlled at 3.4-3.6. This method of preventing electroplated pearl nickel products of the present invention from turning white, controls the pH in the scope of 3.4-3.6 by adjusting the pH value of the half-bright nickel plating solution, so as to prevent the excessive pH value of the semi-bright nickel plating solution from causing the product to turn white. White, by reducing the PH value of semi-bright nickel, the reactivity can be improved and the whitening phenomenon on the product surface can be reduced, and the method is simple, convenient and effective.

Description

technical field [0001] The invention relates to a method for preventing electroplated products from turning white, in particular to a method for preventing electroplated nickel products from turning white, and belongs to the field of physical chemistry. Background technique [0002] When electroplating nickel products, the phenomenon of product fogging and whitening often occurs. There are many reasons for this phenomenon, mainly due to excessive organic impurities, improper use or imbalance of additives, such as too high saccharin content or sodium lauryl sulfate Adding too much content will cause fogging and whitening of the nickel plating layer, which requires regular analysis of the plating solution to ensure that the main components of the plating solution are always maintained within the normal range. Understand these problems and a series of treatment methods. However, there is another important reason for this phenomenon. The pH value of the plating solution is too h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/12
Inventor 沈昌
Owner 延康汽车零部件如皋有限公司
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