Formula of standard bolt electroplating solution

Abstract

The invention relates to a formula of a standard bolt electroplating solution. The formula of the standard bolt electroplating solution is characterized in that the pH value of an plating solution is5.0, and the plating solution comprises of 20-36 g of aluminum chloride, 20-46 g of aluminum oxide, 12-16 g of sodium hydroxide, 15-18 g of silicic acid, 50-64 g of magnesium carbonate, 12-16 g of methyl methacrylate, 7-12 g of potassium chloride, 3-11 g of zinc chloride, 2-5 g of copper chloride, 30-40 g of stannous sulfate, 0.5-2 g of additive bismuth oxide, 0.5-2 g of an additive nonionic surfactant, 5-8 g of a stabilizer hydroquinone, 2-4 g of a brightener gelatin and 300-500 g of deionized water. According to the method, the formula of the plating solution is simple, environment-friendlyand good in stability, the electroplating technology is easy to be controlled, the electroplated coating is uniform and dense, the binding force is good, and the application is wide in the aspect of welding; and in the electroplating process, the plating solution does not generate bubbles, and the plating solution is kept clear all the time.

Description

technical field [0001] The invention relates to the field of electroplating of standard parts, in particular to a formula of electroplating solution for standard bolts. Background technique [0002] In recent years, the rapid development of the electronics industry has made people have higher and higher requirements for solderable coatings. Due to the good solderability of tin and the limited use of lead, a lot of research has been done on tin plating and tin alloy plating. [0003] At present, there are many tinning processes, which are divided into two parts: alkaline tinning and acidic tinning. Alkaline tin plating has many disadvantages, such as: slow deposition rate, low cathodic current efficiency, high alkali concentration will lead to serious hydrogen evolution reaction, and it will also affect tin anode, etc. Acid system tin plating generally includes sulfate system tin plating, fluoroboric acid system tin plating, and methanesulfonic acid system tin plating. Mos...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a standard bolt electroplating solution formula, which can solve the problem that the general standard bolts cannot ensure uniform coating and have good welding performance when the general standard bolts are electroplated.