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中国腐蚀与防护学报  2004, Vol. 24 Issue (5): 272-275     
  研究报告 本期目录 | 过刊浏览 |
双相不锈钢在含硝酸体系的优选腐蚀行为研究
付燕
厦门大学化学系固体表面物理化学国家重点实验室
A Study on the Selective Dissolution Behavior of Duplex Stainless Steel in Systems Containing Nitric Acid
Yan Fu
厦门大学化学系固体表面物理化学国家重点实验室
全文: PDF(175 KB)  
摘要: 研究了双相不锈钢在氧化性的HNO3+HCl、HNO3+NaCl+FeCl3 3种体系中两相的腐蚀差异。通过动电位极化实验,用SEM和EDS对表面形貌进行观测和两相的鉴别,发现奥氏体相是优先腐蚀的相,在HNO3+HCl和HNO3+NaCl中随着Cl-浓度的增加,两相的优选腐蚀更加明显,但在HNO3+FeCl3中,低浓度的FeCl3会掩盖两相的优选腐蚀,而高浓度的FeCl3不存在这种反常行为。
关键词 双相不锈钢铁素体奥氏体优选腐蚀硝酸    
Abstract:Duplex stainless steel is composed of ferritic and austenitic phases, which have different crystal structure and element component, thus in different solutions, ferrite and austenite demonstrate different dissolutio rate, that is , selective dissolution. In this investigation, the potentiodnamic polarization experiment was carried in nitric acid and hydrochloric acid mixture, and mixture of nitric acid and sodium chloride, nitric acid and ferrite chloride as well. After the experiments, SEM and EDS were used to distinguish and analyze the morphology differencs of the two phases. The results show that in the solutions containing nitric acid, adding hydrochloric acid and sodium chloride will enhance the selective dissolution of two phases, while adding low concentration of ferrite chloride will decrease the corrosion difference between ferrite and austenite, but the phenomena vanish with the increasing of the concentration of ferrite chloride.
Key wordsduplex stainless steel    ferrite    austenite    selective dissolution    nitric acid
收稿日期: 2003-10-08     
ZTFLH:  TG172  
通讯作者: 付燕   
Corresponding author: Yan Fu   

引用本文:

付燕 . 双相不锈钢在含硝酸体系的优选腐蚀行为研究[J]. 中国腐蚀与防护学报, 2004, 24(5): 272-275 .
Yan Fu. A Study on the Selective Dissolution Behavior of Duplex Stainless Steel in Systems Containing Nitric Acid. J Chin Soc Corr Pro, 2004, 24(5): 272-275 .

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2004/V24/I5/272

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