Environmentally-friendly coating stripping agent for nitrate hanger of circuit board

Abstract

The invention discloses an environmentally-friendly coating stripping agent for a nitrate hanger of a circuit board. The stripping agent comprises the following components based on the volume ratio before mixing: 10% of sulfuric acid, 15% of hydrogen peroxide, 10% of additive, and 65% of water. According to the environmentally-friendly coating stripping agent, a mode of performing the nitrate coating work through nitric acid in the circuit board production in the prior art is changed, so that a large amount of toxic substances can be avoided; the ammonia nitrogen content of wastewater can be decreased; and the production environment as well as the natural environment can be effectively improved.

Description

technical field [0001] The invention relates to a hanger stripping agent, in particular to a hanger stripping agent suitable for circuit board nitration hangers. Background technique [0002] Today, with the rapid development of electronic products, circuit boards, as the most important components, are in great demand in the market. In the production process of circuit boards, nitrating the hanger is one of the steps. The prior art usually uses nitric acid (concentration 68%) to nitrate the hanger, but when the nitric acid reacts directly with copper and tin, a large amount of toxic yellow smoke will be produced. Production The environment is very harsh, and the content of ammonia nitrogen in nitric acid is high, which makes it difficult to treat the wastewater generated in the production process, and has serious adverse effects on the production environment and the natural environment. Contents of the invention [0003] In order to overcome the defects of the existing te...

AI Technical Summary

Problems solved by technology

In the production process of circuit boards, nitrating the hanger is one of the steps. The prior art usually uses nitric acid (concentration 68%) to nitrate the hanger, but when the nitric acid reacts directly with copper and tin, a large amount of toxic yellow smoke will be produced. Production The environment is very harsh, and the content of ammonia nitrogen in nitric acid is high, which makes it difficult to treat the wastewater generated in the production process, and has serious adverse effects on the production environment and the natural environment.