A kind of stainless steel etchant composition

Abstract

The invention belongs to the technical field of chemical products, and in particular relates to an etching solution composition for stainless steel, which comprises the following components by weight percentage: 0.5% to 3% of a corrosion inhibitor; 35% to 50% of an etchant; and 3% of a dispersant ~ 10%; chelating agent 15% ~ 30%; accelerator 2% ~ 5%; the balance is water; the corrosion inhibitor is an imidazoline compound; the etchant is at least one of sulfuric acid and hydrochloric acid, or It is a combination of at least one of ferric chloride, potassium chlorate and sodium chlorate and at least one of sulfuric acid and hydrochloric acid. Compared with the prior art, the present invention does not contain controlled raw materials such as fluoride, chromic acid, and nitric acid, and can replace the current stainless steel etching solution. It can be operated at room temperature, has safe operation, stable performance, low consumption, and long service life. The waste water can be completely treated according to the chemical precipitation method to meet the discharge standard.

Description

technical field [0001] The invention belongs to the technical field of chemical products, in particular to a stainless steel etchant composition. Background technique [0002] The material of stainless steel is stable, not easy to oxidize, not easy to corrode, and the surface cannot be processed by conventional chemicals. At present, the burrs can only be removed by traditional mechanical grinding or electrochemically polished by using strong corrosive agents such as hydrofluoric acid and chromic acid. The service life is short, the corrosion is high, and it will cause pollution to the environment. There are also safety hazards in operation, which have been gradually restricted and disabled, and the size of the workpiece cannot be controlled, resulting in its poor applicability. [0003] In view of this, it is necessary to provide a stainless steel etchant composition, which does not contain controlled raw materials such as fluoride, chromic acid and nitric acid, can replace...

AI Technical Summary

Problems solved by technology

[0002] The material of stainless steel is stable, not easy to oxidize, not easy to corrode, and the surface cannot be processed by conventional chemicals. At present, the burrs can only be removed by traditional mechanical grinding or electrochemically polished by using strong corrosive agents such as hydrofluoric acid and chromic acid. The service life is short, the corrosion is high, and it will cause pollution to the environment. There are also potential safety hazards in operation. It has been gradually restricted and disabled, and the size of the workpiece cannot be controlled, resulting in its poor applicability.