几种阴离子对316L不锈钢亚稳态孔蚀行为的影响  

THE EFFECTS OF SOME ANIONS ON METASTABLE PITTING OF 316L STAINLESS STEEL

作　　者：王海涛[1] 赵景茂[1] 左禹[1] 熊金平[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《中国腐蚀与防护学报》2002年第4期202-206,共5页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金 ( 5 97710 6 3);国家重点基础研究规划(G19990 6 5 0 )资助

摘　　要：用恒电位和动电位极化法研究了PO3 -4 、CrO2 -4 、SO2 -4 和NO-3 4种阴离子对 316L不锈钢亚稳态孔蚀行为的影响 .4种阴离子均抑制亚稳态小孔的形核速率和生长速率 ,其中PO3 -4 离子作用最强 ,CrO2 -4 离子次之 ,SO2 -4 和NO-3 离子作用较弱 .亚稳态孔蚀开始出现的电位Em 和稳定孔蚀电位Ep 均随离子浓度的对数增大而直线升高 .The effects of PO 3- 4,CrO 2- 4,SO 2- 4and NO - 3 anions on the nucleation and growth of metastable pitting of 316L stainless steel in NaCl solutions were investigated using potentiostatic and potentiodynamic polarization tests.The four anions all retard nucleation and the growth of metastable pitting.PO 3- 4 ions show the strongest inhibition on metastable pitting,followed by CrO 2- 4 ion,and SO 2- 4,and NO - 3 ions have less inhibition effect.Both metastable pitting potential E m and stable pitting potential E p increase almost linearly with logarithm of each anion concentration,and have very close increasing slopes.The inhibition mechanisms of the four anions were also discussed in this paper.

关 键 词：316L不锈钢 亚稳态孔蚀 电流波动 阴离子 

分 类 号：TG172.9[金属学及工艺—金属表面处理] TG174.3[金属学及工艺—金属学]