国产825合金的耐腐蚀性能研究

中国腐蚀与防护学报

2013, Vol. 33

Issue (2): 164-170

研究报告

本期目录 | 过刊浏览

国产825合金的耐腐蚀性能研究

冯勇¹ 何德良¹ 龚德胜² 李菲¹ 吴建新²

1. 湖南大学化学化工学院长沙 410082；
2. 岳阳长岭设备研究所有限公司岳阳 414014

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

全文: PDF(3569 KB)

摘要: 采用腐蚀失重法、电化学测试和慢应变速率拉伸应力腐蚀研究了国产825合金在HCl、NaOH和NaCl溶液中的腐蚀行为，并采用金相显微镜和扫描电镜（SEM）对腐蚀后的样品进行观察。结果表明，国产825合金在HCl溶液中浸泡7 d后发生了明显的腐蚀，腐蚀速率随HCl浓度的增加而增大，而在NaOH和NaCl溶液中浸泡5个月后未发生明显腐蚀，并且在HCl、NaOH和NaCl溶液中合金的腐蚀电流随溶液浓度增加而增大。慢应变速率拉伸应力腐蚀结果表明在HCl、NaOH和NaCl溶液中合金的应力腐蚀敏感性很小，因此，一般情况下不会发生应力腐蚀开裂。

关键词 ：国产825合金, 腐蚀失重, 电化学测试, 应力腐蚀开裂

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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引用本文:

冯勇何德良龚德胜李菲吴建新. 国产825合金的耐腐蚀性能研究[J]. 中国腐蚀与防护学报, 2013, 33(2): 164-170.
. Corrosion Resistance Properties of Domestic 825 Alloy. Journal of Chinese Society for Corrosion and protection, 2013, 33(2): 164-170.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2013/V33/I2/164

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