Electrochemical corrosion behavior of bulk ultra-fine grained Fe-Ni-Cr alloy

被引：17

作者：

Wu, Zhan-wen ^{[1
,2
]}

Chen, Ji ^{[1
]}

Piao, Nan ^{[1
]}

Sun, Cheng ^{[3
]}

Hassan, W. ^{[1
]}

Zhang, Xin-hang ^{[3
]}

Xie, Yu-jun ^{[1
]}

机构：

[1] Liaoning Shihua Univ, Dept Mech Engn, Fushun 113001, Peoples R China

[2] CNOOC Energy Technol & Serv Pipe Engn Co, Tianjin 300452, Peoples R China

[3] Texas A&M Univ, Dept Mech Engn, Mat Sci & Engn Program, College Stn, TX 77843 USA

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2014年 / 24卷 / 06期

关键词：

stainless steel; Fe-Ni-Cr; polarization; acid corrosion; passivation; 304L STAINLESS-STEEL; 304-STAINLESS-STEEL; MICROSTRUCTURES; RESISTANCE; VACANCIES; TENSILE;

D O I：

10.1016/S1003-6326(14)63280-5

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The corrosion behavior of bulk ultra-fine grained (UFG) Fe-Ni-Cr alloy prepared by equal-channel angular pressing technique was investigated in 0.25 mol/L Na2SO4+0.05 mol/L H2SO4 solution by electrochemical measurements. As compared to the coarse grained (CG) counterpart, the UFG alloy exhibits an acceleration of the active dissolution and a shrunk passive region with a higher passive current. The Mott-Schottky analysis in conjunction with the point defect model indicates that the donor diffusion coefficient in the passive films of the UFG sample increases greatly to one magnitude order higher and the donor density is slightly lower than that of the CG sample.

引用

页码：1989 / 1994

页数：6

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