ELECTROCHEMICAL PERFORMANCE OF INITIAL PITTING OF 15-5PH STAINLESS STEEL

Journal of Chinese Society for Corrosion and protection

2012, Vol. 32

Issue (5): 423-427 DOI:

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ELECTROCHEMICAL PERFORMANCE OF INITIAL PITTING OF 15-5PH STAINLESS STEEL

ZHOU Xianliang^1,2, NIE Lun², HUA Xiaozhen², LIU Zhiyong², CUI Xia², PENG Xinyuan²

1. Key Laboratory of Nondestructive Test, Ministry of Education, Nanchang Hangkong University, Nanchang 330063
2. School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063

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Abstract

The initial pitting behavior of 15-5PH stainless steel immersed in 6% FeCl$_{3}$ solution was investigated by electrochemical impedance spectroscopy (EIS) and scanning Kelvin probe (SKP). The results showed that the electrochemical impedance magnitude and the impedance module declined with the immersion time. One time constant appeared in EIS spectrum first then two time constant as the immersion continued. The SKP results indicated that the anodic and cathodic areas alternated constantly with distinct character of localized corrosion. When the corrosion process continued, the surface potential of 15-5PH stainless steel increased, while anodic and cathodic area distinguished evidently from each other.

Key words: 15-5PH stainless steel pitting, EIS SKP 15-5PH stainless steel｜pitting, EIS｜SKP

Received: 07 September 2011

ZTFLH:

TG174.2

Fund:

National Natural Science Foundation of China

Corresponding Authors: zhou xianliang E-mail: nielun23@126.com

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Cite this article:

ZHOU Xianliang, NIE Lun, HUA Xiaozhen, LIU Zhiyong, CUI Xia, PENG Xinyuan. ELECTROCHEMICAL PERFORMANCE OF INITIAL PITTING OF 15-5PH STAINLESS STEEL. Journal of Chinese Society for Corrosion and protection, 2012, 32(5): 423-427.

URL:

https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2012/V32/I5/423

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