Corrosion Resistance Properties of Domestic 825 Alloy

Journal of Chinese Society for Corrosion and protection

2013, Vol. 33

Issue (2): 164-170 DOI:

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Corrosion Resistance Properties of Domestic 825 Alloy

FENG Yong¹, HE Deliang¹, GONG Desheng², LI Fei¹, WU Jianxin²

1. College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;
2. Yueyang Changling Equipment Research Institute Co. Ltd., Yueyang 414014, China

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Abstract Corrosion behaviors of domestic 825 alloy in HCl, NaOH and NaCl solutions were studied by corrosion mass loss, electrochemical test and stress corrosion at slow strain rate. Meanwhile, the corrosion morphologies were investigated by optical microscopy and scanning electron microscopy (SEM). The results showed that the corrosion behavior of the domestic 825 alloy was not obvious after immersion in NaOH and NaCl solutions for 5 months. However, it corroded evidently after immersion in HCl solution for 7 d, and the corrosion rate in HCl solution increased with increasing HCl concentration. Furthermore, the corrosion current of the domestic 825 alloy increased with increasing concentration of HCl, NaOH and NaCl solution, respectively. The stress corrosion tests at slow strain rate showed that the domestic 825 alloy had no stress corrosion susceptibility in the HCl, NaOH and NaCl solution, thus no stress corrosion crack would occur under normal circumstance.

Key words: domestic 825 alloy corrosion mass loss electrochemical test stress corrosion crack

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FENG Yong,HE Deliang,GONG Desheng,LI Fei,WU Jianxin. Corrosion Resistance Properties of Domestic 825 Alloy. Journal of Chinese Society for Corrosion and protection, 2013, 33(2): 164-170.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2013/V33/I2/164

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