Corrosive agent for dendritic crystal corrosion macroscopic examination

Abstract

The invention relates to a corrosive agent for dendritic crystal corrosion macroscopic examination, and belongs to the technical field of chemical analysis and detection. The corrosive agent comprises the following components in percentage by mass: 0.01%-1.0% of copper chloride, 0.01%-1.5% of copper nitrate, 0.01%-1.5% of magnesium chloride, 0.01%-3.0% of ferric chloride, 0.01%-2.0% of ferrous chloride, 1.0%-4.0% of hydrochloric acid, 40%-50% of absolute ethyl alcohol and the balance of water. According to the technical scheme, the components of the corrosive agent are optimally selected, so that the detection range of ferrous metal types is widened. The invention further relates to a waste liquid treatment system for the corrosive agent. According to the invention, aiming at the problems that the concentration of hydrochloric acid contained in the corrosive agent is relatively high and hydrochloric acid escapes into air in the corrosion process, an air draft cabinet is designed in a matched manner to pump out hydrochloric acid in air in the corrosion process, so that the respiratory tract of an operator is prevented from being injured; and waste acid generated in the corrosion process is collected in a centralized mode through the integrated treatment box, and waste acid treatment is facilitated.

Description

[0001] This application is a divisional application with an application date of September 17, 2018, an application number of 201811084496.X, and an invention title of a corrosive agent for low-magnification inspection of dendrite corrosion and a waste liquid treatment system technical field [0002] The invention relates to a corrosive agent used for low-magnification inspection of dendrite corrosion and a waste liquid treatment system used for the corrosive agent, belonging to the technical field of chemical analysis and detection. Background technique [0003] The low-magnification inspection method of dendritic corrosion is a low-magnification inspection method for continuous casting slabs that is becoming more and more perfect with the development of continuous casting technology. Compared with traditional low-magnification inspection methods such as sulfur printing and hot acid etching, it can not only accurately display the internal defects of continuous casting slabs, ...

AI Technical Summary

Problems solved by technology

[0005] Traditional dendritic corrosion low-magnification test corrosive agents cannot meet the current defect detection of high value-added ferrous metals, such as nuclear power steel, aircraft carrier plate steel, special high-temperature alloy steel, etc., and with the improvement of smelting process With continuous improvement, the defects of the product itself are decreasing day by day. Only through the construction and improvement of the solidification structure can the designed varieties achieve the proper performance, which cannot be achieved by traditional low-magnification inspections.

Moreover, most of the corrosive agents used in the existing dendrite corrosion low-magnification inspection methods contain strong acids, and the spent acid needs to be neutralized after the experiment is completed. The general neutralization treatment is neutralized by adding alkali, but this reaction requires The lye is configured and the pH needs to be tested. The processing steps are relatively complicated. Once the lye is excessive, it needs to be adjusted again, so the processing method needs to be improved.

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