摘要
采用原子吸收光谱（ＡＡＳ）方法测定不锈钢局部破坏后各种元素的析出量，研究了３２１不锈钢在ＮａＣｌ水溶液中钝化膜孔蚀破坏的特征．研究结果表明：ＡＡＳ可有效地用于不锈钢孔蚀动力学的研究．蚀孔内发生金属的活性溶解腐蚀；Ｃｒ以三价离子，Ｆｅ，Ｎｉ和Ｍｎ以二价离子形式溶解；Ｆｅ，Ｃｒ的溶解量对孔蚀自催化效应有显著的影响。
Atomic absorption spectrometry (AAS) has been applied to investigate the kinetics of pitting propagation for 321 stainless steel in 0.5 mol/ L NaCl media. The results indicate the occurrence of the active corrosion of metals in the pitting holes. Fe, Ni and Mn, in form of divalence, and Cr in form of trivalvence dissolve into solution. On the basis of AAS data, the influence of the amounts Fe2+ and Cr3+ dissolved in corrosion pits upon the autocatalytic processes is discussed.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第4期443-448,共6页
Acta Metallurgica Sinica
基金
国家自然科学基金
金属腐蚀与防护国家重点实验室资助
关键词
原子吸收光谱
孔蚀
自催化
不锈钢
钝化膜
atomic absorption spectrometry(AAS), pitting propagation, autocatalytic process
