Electrochemical behavior of passive film on 304 stainless steel and chromaticity inspection method of film quality
The passive film formed on 304 stainless steel during self-passive in air was characterized by a chromaticity inspection technique, and the stainless steel after chemical passive in HNO3 solution was examined for comparison. The a* value measured by the inspection nonlinearly decreases with prolonging self-passive time, while it is close to zero for the chemical passive sample. Electrochemical behavior of passive film in the 3.5 wt. ％ NaCl solution reveals that the resistance of passive film from EIS examination decreases with increasing a* value, and Mott-Schottky analysis indicated that both donor and acceptor density in passive film is non-linear correspond to a* value. It is considered that the growth of outer Fe-richen oxide and inner Cr-richen oxide in the passive film is responsible for the measured a* value and its relationship with the electrochemical behavior.
Stainless steel Chromaticity Passive film
Congqian Cheng Tieshan Cao Qinqin Fu Dewei Deng Jie Zhao Guanyu Song
School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, China School of Materials Science and Engineering,Dalian University of Technology, Dalian 116085, China
国际会议
2012 International Symposium on Structural Integrity 2012国际结构完整性学术研讨会 ISSI 2012
济南
英文
161-167
2012-10-31（万方平台首次上网日期，不代表论文的发表时间）