Method for preventing electrochromism product from skip plating and hard spots

A technology for electroplating chromium and products, applied in the field of physical chemistry, can solve the problems that the palladium activator cannot meet the requirements, and achieve the effect of promoting palladium activation and ensuring no missing plating

Inactive Publication Date: 2014-06-04
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

The use of a single palladium activator can no longer meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The electroplating substrate bridegroom Yiheng strip, after degreasing, roughening, recycling, two reductions, palladium activation, degumming, electroless nickel plating, pre-plating copper, copper plating, acid activation, semi-bright nickel plating, bright plating Electroplating products are formed after nickel, nickel sealing, chrome plating, reduction, ultraviolet sterilization, wind cutting and drying processes, and the previous process is washed into the next process. Among them, in the palladium activation process, the concentration of tin ions in the palladium activation tank was analyzed to be 2.0g / L, so 2L of palladium water with low tin concentration was added to complete the electroplating in the next process. Analysis showed that the concentration of tin ions was controlled at 1.6g / L. After inspection, the obtained products have neither missing plating nor bad defects, and the authenticity rate reaches 95%.

Embodiment 2

[0014] Select the substrate bridegroom Yiheng decorative strip, and form the product according to the electroplating steps described in Example 1. Wherein in the palladium activation step, the concentration of tin ions obtained through analysis is 1.0g / L, so 2.0L volume of palladium water with high tin concentration is added, and the analysis shows that the concentration of tin ions is controlled at 1.4g / L. After inspection, the obtained product has neither missing plating nor bad defects, and the authenticity rate of the product is 95%.

Embodiment 3

[0016] Select the substrate bridegroom Yiheng decorative strip, and form the product according to the electroplating steps described in Example 1. Wherein in the palladium activation step, the concentration of tin ions is analyzed to be 1.2g / L, so 2.0L volume of palladium water with high tin concentration is added, and the analysis shows that the concentration of tin ions is controlled at 1.6g / L. After inspection, the obtained products have neither missing plating nor bad defects, and the product authenticity rate is 98%.

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PUM

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Abstract

The invention discloses a method for preventing an electrochromism product from skip plating and hard spots. The method comprises the steps of oil removing, coarsening, recovering, reducing at two times, activating with palladium, peptizing, plating of chemical nickel, copper pre-plating, copper plating, activating with acid, semi-bright nickel plating, bright nickel plating, nickel sealing, chromium plating, reducing, ultraviolet sterilizing, wind shearing, and drying, wherein washing is performed between every adjacent two processes; when activating with palladium, palladium activating liquid with high tin concentration or palladium activating liquid with low tin concentration is added to a palladium activating bath to control the concentration of tin ions to be 1.2 to 1.8g/L. The invention also provides a method for controlling the concentration of tin ions in the electroplating process. The method is characterized in that two kinds of palladium activating liquid are utilized for effectively adjusting to control the tin ion concentration to be within the optimal range of 1.2 to 1.8g/L, additionally, the content of palladium can also be supplemented, and thus the activating with palladium is effectively promoted, and as a result, the electroplating quality of the product is ensured, and the product is also prevented from skip plating and hard spots.

Description

technical field [0001] The invention relates to a method for preventing missing plating and pitting of electroplated chromium products, belonging to the field of physical chemistry. Background technique [0002] During the electroplating process, the concentration of tin ions has a great influence on the surface of the final electroplated parts. If the concentration of tin ions is too high, it will cause missing plating of the product. If the concentration of tin ions is too low, it will cause defects such as pitting, and finally cause the product scrapped. The study found that controlling the concentration of tin ions in the optimal range is one of the effective measures to ensure the electroplating quality of the product. The use of a simple palladium activator cannot meet the requirements. In the past, when the tin ion content was controlled at about 4.0, it would lead to frequent missing plating. Through accumulated experience and various attempts, the research found t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/02C23C18/18
Inventor 沈昌
Owner 延康汽车零部件如皋有限公司
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