Tin electroplating treatment process

Abstract

The invention belongs to the technical field of metal surface treatment, and provides a tin electroplating treatment process. The tin electroplating treatment process comprises an electroplating treatment step and a polishing treatment step before the electroplating treatment step, wherein a polishing solution used in the polishing treatment step comprises a tin electroplating waste solution afterthe last electroplating treatment step. According to the tin electroplating treatment process, oil dirt on the surface of a base material is removed through a surfactant in the tin electroplating waste solution; the polishing solution is composed of sulfuric acid in the tin electroplating waste solution, and added waste solution and glacial acetic acid, and capable of removing an oxide layer on the surface of the base material, and the surface of a copper material is enabled to be smooth and bright, so that the purposes of brightness and high weldability of a plating layer are achieved.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to an electrolytic tin plating process. Background technique [0002] The application of electroplating tin is very extensive. Tin has the advantages of corrosion resistance, discoloration resistance, non-toxicity, easy brazing, softness, low melting point and good ductility. Dense, uniform and continuous alloy coating. [0003] Usually, before electroplating, it is necessary to remove oil stains and oxides on the substrate to make the surface smooth and bright, so as to facilitate the formation of a good bond between the coating and the substrate, thereby improving the quality of electroplating. At present, two methods are often used in the market, one is to degrease the base material first, and then polish the base material. The other group is to add a degreasing agent to the polishing liquid, and the degreasing and polishing are one-time treatment. However, bot...

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Problems solved by technology

However, the above two methods require the additional use of degreasing agents

[0004] In addition, acid and additives are often added to the electroplating tank during the production process. After the electroplating is completed, the remaining electroplating solution cannot be reused, and the electroplating solution will also be produced during the cleaning and maintenance of the electroplating tank. The usual treatment method is to directly discharge it into sewage treatment. This will increase the environmental pollution, but also increase the cost of sewage treatment

It is inconsistent with the energy saving and consumption reduction and process simplification advocated now

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