Environment-friendly anti-discoloration corrosion-resistant tinning preparation process for chaplet

Abstract

The invention relates to an environment-friendly anti-discoloration corrosion-resistant tinning preparation process for a chaplet. The environment-friendly anti-discoloration corrosion-resistant tinning preparation process comprises the following steps that (1) pretreatment is carried out, specifically, pretreatment of chemical degreasing, pickling rust removal and activation is sequentially carried out on the chaplet; (2) electrotinning is carried out, specifically, the pretreated chaplet is put into an electroplating bath I, wherein the electroplating bath I comprises an electroplating bathbody, a constant current / constant potential rectifier, an anode, an electroplating bath heating device, a temperature sensor, a height adjusting block and a lifting device, wherein a plating solutionI comprises a stannous methanesulfonate stock solution, methanesulfonic acid, an additive, 2,5-dihydroxy benzene sulfonate and deionized water; (3) cleaning is carried out; (4) electrotinning is carried out; (5) cleaning is carried out; (6) anti-discoloration treatment is carried out; and (7) blow-drying is carried out. The environment-friendly anti-discoloration corrosion-resistant tinning preparation process for the chaplet is reasonable and simple in process step and high in operability, and the technical problems that in the prior art, a chaplet tinning preparation process is large in environmental pollution, poor in tinning layer corrosion-resistant effect and poor in anti-discoloration effect are solved.

Description

technical field [0001] The invention belongs to the technical field of core brace preparation, and in particular relates to an environment-friendly anti-discoloration and corrosion-resistant tin plating preparation process for core braces. Background technique [0002] Strut, the metal support that supports the core in the mold, the material of which is the same as or close to that of the casting. For rust resistance and better bonding to molten metal, the stud surface should be cleaned and tinned. Tin is a metal with good plasticity, which is very convenient in rolling, stamping and stretching. Tin is easy to be polished, polished or heated and melted into fine decoration. It has good corrosion resistance, environmental protection, brazing and softness. And ductility, etc. At the same time, tin is not easy to tarnish, but also has high chemical stability. It does not undergo chemical reactions in the air at room temperature, and is very stable in fresh water or sea water. ...

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: In order to overcome the above deficiencies, the purpose of the present invention is to provide an environmentally friendly, anti-discoloration and corrosion-resistant tin plating process for core supports. The process steps are reasonable, simple and operable, and solve the problem of core supports in the prior art Due to the technical problems of large environmental pollution, poor corrosion resistance and poor anti-discoloration effect of the tin plating layer in the tin-plating preparation process, the corrosion resistance and anti-discoloration performance of the core support are greatly improved through secondary tinning and anti-discoloration treatment. Has broad application prospects

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