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中国腐蚀与防护学报  2013, Vol. 33 Issue (3): 182-187    
  本期目录 | 过刊浏览 |
904L不锈钢在氢氟酸和浓硫酸混合液中的
腐蚀行为
曾洪涛1,2 向 嵩1,2 刘松林3 何勇刚3
1. 贵州大学材料与冶金学院 贵阳 550003;
2. 贵州省材料结构与强度重点实验室 贵阳 550003;
3. 瓮福蓝天氟化工股份有限公司 福泉 550508
Corrosion Behaviors of 904L Austenite Stainless Steel in Concentrated Sulfuric Acid Containing Hydrofluoric Acid
ZENG Hongtao1,2, XIANG Song1,2, LIU Songlin3, HE Yonggang3
1. School of Materials and Metallurgy, Guizhou University, Guiyang 550003, China;
2. Key Laboratory for Mechanical Behavior and Microstructure of Materials, Guiyang 550003, China;
3. Wengfu Lantian Fluorine Chemical Co., Ltd., Fuquan 550508, China
全文: PDF(3258 KB)  
摘要: 采用动电位极化曲线、循环极化曲线和电化学阻抗谱(EIS)研究了904L不锈钢在氢氟酸和浓硫酸混合液中的腐蚀行为。结果表明:氢氟酸含量低于2%(质量分数)时,对904L不锈钢在浓硫酸中的腐蚀有抑制作用;氢氟酸含量高于2%时,对904L不锈钢在浓硫酸中的腐蚀有促进作用。随着氢氟酸含量的增加,904L不锈钢的腐蚀由电化学步骤控制转变为传质和电化学步骤混合控制。EIS随着氢氟酸含量的增加从1个时间常数变为2个时间常数,即表现为高频容抗弧和低频感抗弧。
关键词 904L不锈钢腐蚀行为浓硫酸氢氟酸电化学阻抗谱    
Abstract:Potentiodynamic polarization curves, cyclic polarization curves and electrochemical impedance spectroscopy (EIS) were used to investigate the corrosion behaviors of 904L stainless steel in concentrated sulfuric acid containing hydrofluoric acid. The result shows that the corrosion of 904L stainless steel in concentrated sulfuric acid is inhibited when the mass fraction of hydrofluoric acid is less than 2%; while the corrosion is promoted when the mass fraction of hydrofluoric acid is higher than 2%. With the increase of hydrofluoric acid concentration, the corrosion controlling step changes from electrochemical reaction to mixed mass transportation-electrochemical reaction. EIS and the plots present the change of time contant from one to two, i.e. capacitance loop in high frequency and inductance loop in low frequency.
Key words904L stainless steel    corrosion behavior    concentrated sulfuric acid    hydrofluoric acid    electrochemical impedance spectroscopy
    
ZTFLH:  TG142.71  

引用本文:

曾洪涛,向 嵩,刘松林 何勇刚. 904L不锈钢在氢氟酸和浓硫酸混合液中的
腐蚀行为[J]. 中国腐蚀与防护学报, 2013, 33(3): 182-187.
. Corrosion Behaviors of 904L Austenite Stainless Steel in Concentrated Sulfuric Acid Containing Hydrofluoric Acid. Journal of Chinese Society for Corrosion and protection, 2013, 33(3): 182-187.

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2013/V33/I3/182

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