测定奥氏体不锈钢晶粒度的试剂很多。一类是化学浸蚀剂,如氯化铁盐酸酒精溶液;一类是电化学浸蚀,如10%草酸或10%铬酸水溶液,或用磷酸-硫酸-铬酐水溶液电解抛光后减小电流密度来浸蚀奥氏体晶界。但这些试剂有一个共同的弱点,浸蚀时晶界和晶内孪晶往往同时显现,特别是浸蚀经固溶处理和混晶 Determination of austenitic stainless steel grain size of many reagents. One is the chemical etchant, such as ferric chloride hydrochloride alcohol solution; one is electrochemical etching, such as 10% oxalic acid or 10% chromic acid solution, or phosphoric acid - sulfuric acid - chromic anhydride solution after electrolytic polishing current Density to etch austenite grain boundaries. However, these agents have a common weakness, when the grain boundary and intragranular twinning often appear at the same time, especially by etching solution and mixed crystal solution