疲劳裂纹扩展对高强钢电化学性能的影响  

Study of Corrosion Fatigue Crack Propagation Behavior of High-strength Steel by Electrochemical Method

作　　者：张慧霞[1] 程文华[1] 邓春龙[1] 王均涛[1] 

机构地区：[1]中国船舶重工集团公司第七二五研究所海洋腐蚀与防护重点实验室,山东青岛266101

出　　处：《装备环境工程》2011年第1期57-60,共4页Equipment Environmental Engineering

摘　　要：采用线性极化、电化学交流阻抗等方法,研究了施加疲劳载荷前后高强钢在质量分数为3.5%的NaCl溶液中的电化学行为。结果表明,施加疲劳载荷后,开路电位变化值在裂纹扩展过程中经历先负移后稳定最后稍有正移,由线性极化和交流阻抗拟合得到的极化电阻都呈先增大后减小的趋势。Electrochemical behavior of high-strength steel under fatigue load in 3.5% NaCl solution was studied with linear polarization（LP）and AC electrochemical impedance spectroscopy（EIS）methods.The results showed that open circuit potential first decreased and then stabilized and increased a little finally during corrosion fatigue crack propagation process;polarization resistance obtained using LP and EIS both increased first and then decreased.

关 键 词：高强钢 疲劳裂纹扩展 线性极化 交流阻抗 

分 类 号：TB304[一般工业技术—材料科学与工程]