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Hard chromium electroplating process

An electroplating process and hard chrome technology, applied in the process field of hard chrome plating parts, can solve the problems of damage to the coating, high cost, low yield, etc., and achieve the effects of improving corrosion resistance, low cost and good use effect

Inactive Publication Date: 2007-06-27
倪祥珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such materials are often costly, and there is always a thin layer during electroplating. Due to improper surface treatment of the substrate, the coating will fall off or be damaged, resulting in damage or wear of the coating. At this time, the plating will show local oxidation. Make the plated parts extremely unsightly
Some technicians have developed a hard chrome plating process to perform hard chrome plating on some long-term worn workpieces, which can slightly improve the corrosion resistance of the coating surface, but to maintain this state for a long time, it is necessary to add other alloy coatings , this kind of processing has many pre-treatment processes, complex process, large equipment investment, low yield and high cost

Method used

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Embodiment Construction

[0014] In the present invention, the impurities on the surface of the plated piece must be cleaned up. Proportioning mixed oil, the weight ratio of the mixed oil can be arbitrarily proportioned, and the optimal proportion is 10% of lubricating oil, 40% of floor wax, 40% of beeswax, and 10% of vaseline. The mixed oil is heated and melted. Since the ignition point of the above substances is low, the heating tool must be controlled, and an open flame cannot be used for heating. In this implementation, electric heating is used for heating. When the temperature of the mixed oil reaches 80-160°C , the oil immersion treatment can be carried out on the plated parts.

[0015] The heating temperature and time are selected as follows: when the temperature is 80°C, the heating time is 150 minutes, at 120°C, the heating time is 120 minutes, and at 160°C, the heating time is 90 minutes.

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Abstract

The present invention relates to metal antioxidizing process, and is especially hard chromium electroplating process. The hard chromium electroplating process includes one common chromium electroplating process and the subsequent oil soaking treatment with transformer oil or mixed oil of lubricant oil, floor wax and beeswax. The hard chromium electroplating process has the low smelting point compound permeated into the cracks of the hard chromium layer to prevent oxidation and raise the anticorrosive performance of the electroplated part. The present invention has simple technological process, low cost and high anticorrosive effect.

Description

technical field [0001] The invention relates to an anti-oxidation method for metal surfaces, in particular to a process method for hard chrome plated parts. Background technique [0002] For metals that are easy to oxidize and whose surface is corroded, we use electroplating technology to coat the workpiece with a layer of material that is not easy to oxidize, so as to achieve a beautiful and smooth effect. However, such materials are often costly, and there is always a thin layer during electroplating. Due to improper surface treatment of the substrate, the coating will fall off or be damaged, resulting in damage or wear of the coating. At this time, the plating will show local oxidation. Make the plated parts extremely unsightly. Some technicians have developed a hard chrome plating process to perform hard chrome plating on some long-term worn workpieces, which can slightly improve the corrosion resistance of the coating surface, but to maintain this state for a long time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/48
Inventor 倪祥珍
Owner 倪祥珍