Method for plating tin on aluminum and aluminum alloy coiled material

Abstract

The invention discloses a method for tinning aluminum and aluminum alloy coils. After the coils are unrolled, the following main steps are successively and continuously carried out: (1) degreasing, degreasing and pickling of the coil surfaces; (2) coiling Zinc immersion on the surface twice; (3) Nickel plating on the zinc layer and activation; (4) tin plating on the nickel layer, passivation after micro-etching; (5) use of organic matter to block micropores on the surface of the tin layer; (6) The coil is blown and dried. The invention realizes the continuous electroplating process of aluminum and aluminum alloy coils, that is, the tinning process of aluminum and aluminum alloy coils. The electroplated products have good electrical conductivity, strong weldability, fast heat dissipation, light weight, easy stamping, Low cost and other characteristics, the aluminum material after electroplating has the properties of tin material, which can achieve the purpose of replacing tin material.

Description

technical field [0001] The invention relates to a method for plating tin on a metal substrate, in particular to a method for plating tin on aluminum and aluminum alloy coils, and belongs to the technical field of metal surface processing. Background technique [0002] The electroplating process is the process of plating a thin layer of other metals or alloys on the metal surface using the principle of electrolysis. It is a process of using electrolysis to attach a layer of metal film to the surface of metal or other material parts to prevent metal oxidation (such as Rust), improve wear resistance, electrical conductivity, reflectivity, corrosion resistance and enhance the appearance. [0003] The traditional electroplating production method is: first find material manufacturers to purchase materials, then go to stamping and forming, then electroplating, and finally return to users. This method adds additional intermediate links, transportation costs, time costs, etc. As th...

AI Technical Summary

Problems solved by technology

As the production process of electronic products becomes more and more mature, the requirements for suppliers are also getting higher and higher. When the products need to be welded, the weight of the single chip is lighter, and the production speed is faster, the traditional production methods can no longer meet the needs of customers. Require

[0004] The traditional electroplating method cannot overcome the continuous electroplating process of coils. Although there are continuous electroplating production processes in the market, the process of electroplating tin on aluminum alloy coils is not yet mature. Therefore, in order to achieve continuous electroplating of coils The process still needs to overcome technical difficulties