Nickel-removing solution for adverse chemical nickel plating layer of printed circuit board and preparation method thereof and method for removing adverse chemical nickel plating layer
A technology for printed circuit boards and nickel stripping solution, which is applied to nickel stripping solution and its preparation method, and the field of removing bad coatings by using the nickel stripping solution, which can solve the problems of high use temperature, great human injury, and difficult control, etc. Achieve the effects of constant nickel stripping speed, short nickel stripping time and integrity protection
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[0013] The present invention is described in further detail below in conjunction with embodiment. Nickel stripping solution for poor chemical nickel plating on printed circuit boards, the solution per liter is composed of the following substances and dosage: sodium persulfate 10-300g, 98% sulfuric acid solution 10-200g, corrosion inhibitor alkanones 0.1-100g, Corrosion inhibitor thiazoles 0.1-50g, solvent is water. Alkanones use either or both of polyvinylpyrrolidone, N-methylpyrrolidone, and thiazolidinedione, and thiazoles use either or both of mercaptobenzothiazole, benzothiazole, and methylbenzothiazole .
[0014] The dosage of sodium persulfate per liter of solution is preferably 100-200g, the dosage of sulfuric acid solution is preferably 50-100g, the dosage of alkanones is preferably 1-10g, and the dosage of thiazoles is preferably 1-5g.
[0015] The present invention considers that the circuit board is not resistant to high temperature, high-concentration strong alka...
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