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| EFFECTS OF SOLID SOLUTION TEMPERATURE ON PITTING CORROSION BEHAVIOR OF 15-5PH PRECIPITATION HARDENED STAINLESS STEEL |
| ZHOU Xianliang1,2, NIE Lun2, HUA Xiaozhen2, LIU Zhiyong2, CUI Xia2, PENG Xinyuan2
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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 pitting corrosion resistance property of 15-5PH martensite precipitation hardened stainless steel with direct aging treatment after different solution temperature was investigated by immersion test, polarization curves,cyclic polarization curves and electrochemical spectroscopy. The microstructure and phases precipitated was studied by optical metallography, X-ray diffraction(XRD) and scanning electron microscopy(SEM). The results show that with the solution temperature ascending, the self-corrosion potential became negative, the self-corrosion current and the corrosion rate increased but the pitting corrosion resistance property was decreased. The microstructure of aging treatment after different solution temperature was lath martensite and a few austenite. The NbC carbide were observed in the specimen quenched and aged at 550℃ for 4 h. The homogeneity of the microstructure and less precipitates solution treatment at 1000℃ had the best pitting corrosion resistance. When solution treatment at 1070℃ the Cu-rich precipitates distributed, but Cu precipitation led to the declination of pitting corrosion resistance.
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Received: 25 May 2011
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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. EFFECTS OF SOLID SOLUTION TEMPERATURE ON PITTING CORROSION BEHAVIOR OF 15-5PH PRECIPITATION HARDENED STAINLESS STEEL. J Chin Soc Corr Pro, 2012, 32(4): 333-337.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2012/V32/I4/333
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