ETCHING SOLUTION FOR MICROSTRUCTURE ANALYSIS OF HIGH-FREQUENCY HEAT-TREATED MEDIUM CARBON STEEL, ETCHING METHOD USING SAME

摘要

The present invention relates to an etching solution which can be suitably used when observing a microstructure of high-frequency heat-treated carbon steel with a large difference between an internal structure and a surface structure, suppress unevenness of etching on a surface portion and the generation of adsorbents generated in an etching process, and thus enables the acquisition of etching structure to make analysis easy. The etching solution according to the present invention is composed of: 1.8-2.0 wt% of picric acid, 2.4-2.6 wt% of sodium dodecylbenzenesulfonate, 1-2 wt% of hydrochloric acid, 0.01-0.02 wt% of cupric chloride, and 0.004-0.01 wt% of ferric chloride, and a balance solvent.;COPYRIGHT KIPO 2020