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引言许多文献中都系统地描述了不锈钢在硝酸中的腐蚀现象、影响腐蚀的因素以及有关问题的基本研究。一般认为,不锈钢在硝酸中的腐蚀具有晶界腐蚀特征,但由于晶粒脱落以及均匀腐蚀作用,使晶界腐蚀深度总保持在表面以下一至二个晶粒度深的范围内。钢中所含的铬,溶解在硝酸中,对加速钢的腐蚀起重要作用。铬以低价态溶入硝酸,被热、浓
Introduction Many documents systematically describe the corrosion of stainless steel in nitric acid, the factors that affect the corrosion and the basic research on related issues. It is generally believed that the corrosion of stainless steel in nitric acid has the characteristics of grain boundary corrosion, but the grain boundary corrosion depth always remains within the range of one to two grain depths below the surface due to the grain detachment and the uniform corrosion. Chromium contained in steel, dissolved in nitric acid, to accelerate the corrosion of steel play an important role. Chromium dissolved in nitric acid at a low price, was hot, concentrated