王建民,张燕,王艳芳,陈学群.低合金钢中夹杂物对点蚀的影响[J].装备环境工程,2013,10(1):13-16,37. WANG Jian-min,ZHANG Yan,WANG Yan-fang,CHEN Xue-qun.Effect of Inclusions in Low Alloy-steels on Pitting[J].Equipment Environmental Engineering,2013,10(1):13-16,37.
低合金钢中夹杂物对点蚀的影响
Effect of Inclusions in Low Alloy-steels on Pitting
Two low alloy steels with similar chemical compositions were selected as objects of research. Inclusions in them were analyzed by electronic probe micro-analyzer. The effects of inclusions in low alloy-steels were discussed by polarization tests and simulated occluded corrosion cell combined with microanalysis. The results showed that the inclusions in low alloy-steels are the main pitting initiation and the sulfide inclusions are easier to cause pitting corrosion than other inclusions; inclusions also accelerates pitting corrosion propagation and forms deep pit after dissolving; pitting potential of the alloy-steel by calcium treated and refined secondarily was nobler than that of the steel without because of the less and smaller inclusions; at the same time, pitting propagating rate of the steel treated by calcium and refined secondarily was also less than that of the steel without treatment.