Etching method and equipment of etching stainless steel by ferric chloride

Abstract

The invention relates to an etching method and equipment of etching a stainless steel by ferric chloride and equipment for etching the stainless steel by the ferric chloride, relates to the technical field of etching the stainless steel and aims to solve the technical deficiencies of the stainless steel etched by the traditional ferric chloride etching solution that the service life is short, the etching quality can not be ensured and the like. The etching method comprises the steps of before first etching, metering the total amount of the stainless steel needed etching, and carrying out sampling examination on the etching solution; after the first etching is completed, calculating the loss amount of the stainless steel, and carrying out sampling examination on the etching solution again; and according to the loss amount of the stainless steel and the variable quantities of percentage mass contents of ferrous chloride, free acid and the ferric chloride in the etching solution, setting the starting time periods of first and second addition pumps controlled to be started each etching in a main control module. With the adoption of the etching method, the service life of the ferric chloride etching solution is prolonged, the frequency of washing an etching machine is reduced, the yield is increased, the etching solution has stronger stability, the quality of a product is improved, the production benefit is wholly increased, the cost is lowered, and the effect is obvious.

Description

technical field [0001] The invention relates to the technical field of stainless steel etching. Background technique [0002] Chemical etching is a process in which unwanted metals are quickly dissolved and removed by chemical reactions using the corrosive action of chemical solutions. The basic process of chemical etching is to carry out conventional cleaning and degreasing of the initial metal body to make the surface clean, and then cover the surface with acid-resistant ink, and expose it according to the processing drawings, then carry out development and hardening treatment, and then use chemical The etching solution corrodes the exposed metal. After the corrosion process is over, the ink on the surface is removed with a strong alkaline solution, and finally cleaned with water to obtain an etched product. [0003] Ferric chloride etching solution etches stainless steel to produce ferric chloride: Fe+2FeCl 3 →3FeCl 2 At this time, the concentration of the etching solu...

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Problems solved by technology

[0004] In summary, the purpose of the present invention is to solve the technical deficiencies such as the short service life of the existing ferric chloride etching solution for etching stainless steel, and the unguaranteed etching quality, and propose an etching method and equipment for etching stainless steel with ferric chloride

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