工程科学学报2016，Vol.38Issue(1)：87-94,8.DOI:10.13374/j.issn2095-9389.2016.01.012
表面状态对核级316LN不锈钢电化学腐蚀行为的影响
Effects of surface state on the electrochemical corrosion behavior of nuclear grade 316LN stainless steel
摘要
Abstract
Differences between the ground and mechanically polished 316LN stainless steel were characterized on the surface topography,surface residual strain and electron work function.The electrochemical behavior of the stainless steel was investigated in a borate buffer solution.The ground 316LN stainless steel is featured by a rougher surface with scratches along the grinding direction.Compared with the mechanically polished sample,a thicker cold-worked layer (～ 50 μm) is imparted by surface grinding,indicating that the residual strain on the ground surface is much higher.The ground surface is more electrochemically active and exhibits a larger corrosion rate in the borate buffer solution,because of its rougher surface topography and a higher residual strain.The passive film on the mechanically polished sample is more compact and protective,due to the decrease of acceptor and donor density and the increase of total impedance of the passive film.关键词
不锈钢/钢腐蚀/表面状态/电化学Key words
stainless steel/steel corrosion/surface states/electrochemistry分类
矿业与冶金引用本文复制引用
郭跃岭,韩恩厚,王俭秋..表面状态对核级316LN不锈钢电化学腐蚀行为的影响[J].工程科学学报,2016,38(1):87-94,8.基金项目
国家科技重大专项课题(2011ZX06004-009) （2011ZX06004-009）
国家重点基础研究发展计划资助项目(2011CB610501) （2011CB610501）
