辽宁工程技术大学学报（自然科学版）2012，Vol.31Issue(3)：387-391,5.
纳米金属Cr在酸性介质中腐蚀电化学行为
Studies on the corrosion elecrochemical behavior of nanocrystalline Cr in acidic media
摘要
Abstract
In order to study corrosion mechanisms of nanocrystalline materials, nanocrystalline metal Cr is prepared by mechanical alloying through hot-pressing processes. Its corrosion mechanism and corrosion resistances in acidic media is thus investigated as compared with the corresponding coarse-grained Cr. Results show that with the increment of acid concentration, the corrosion current densities increase and therefore the corrosion resistances decrease. After the grain size is refined, the corrosion current densities of nanocrystalline Cr are larger than those of the corresponding coarse grained materials. This indicates that the corrosion resistances decrease when the grain size is refined. Two kinds of grain size metal Cr produce passive phenomena, but they become weaker with the increment of acid concentration. The electrochemical impedance spectroscopy (EIS) of the two alloys in acidic media is composed of single capacitive loop. This study is of significance for nanocrystalline materials applications.关键词
纳米金属Cr/酸性介质/腐蚀性能/电化学行为/极化曲线/阻抗技术/晶粒细化Key words
nanocrystalline metal Cr/ acidic media/ corrosion properties/ electrochemical behavior/ polarizationcurve/ EIS technique/ refined grain分类
矿业与冶金引用本文复制引用
代岚,王艳,曹中秋..纳米金属Cr在酸性介质中腐蚀电化学行为[J].辽宁工程技术大学学报（自然科学版）,2012,31(3):387-391,5.基金项目
辽宁省高等学校优秀人才支持计划资助项目(LR2011032) （LR2011032）
沈阳师范大学实验中心主任基金资助项目(SY200702) （SY200702）
