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材料研究学报  2011, Vol. 25 Issue (6): 645-650    
  研究论文 本期目录 | 过刊浏览 |
不同Cr含量的Ni基合金电化学腐蚀行为
张艳, 田苗苗, 李墨,  刘蕾
沈阳工业大学理学院 沈阳 110023
Electrechemical Corrosion of Nickel-based Alloys with Different Chromium Contents
ZHANG Yan, TIAN Miaomiao, LI Mo LIU Lei
School of Science, Shenyang Univesity of Technology, shenyang 110023
引用本文:

张艳 田苗苗 李墨 刘蕾. 不同Cr含量的Ni基合金电化学腐蚀行为[J]. 材料研究学报, 2011, 25(6): 645-650.
. Electrechemical Corrosion of Nickel-based Alloys with Different Chromium Contents[J]. Chin J Mater Res, 2011, 25(6): 645-650.

全文: PDF(2045 KB)  
摘要: 利用电化学测试技术研究不同Cr含量的Ni基合金耐Cl-离子水溶液腐蚀的能力。结果表明: Ni基合金耐Cl-离子腐蚀性能随着合金中Cr含量的提高而增强, 溶液中Cl-离子浓度对Ni--9Cr、Ni--15Cr和Ni--20Cr合金有较大影响, 特别是Ni--9Cr合金在0.6 mol/L NaCl溶液中腐蚀最为严重, 而对于Ni--25Cr和Ni--30Cr合金的腐蚀不明显。通过采用XPS测试方法, 对不同Cr含量的Ni基合金在0.6 mol/L NaCl溶液中形成的钝化膜表面进行成分分析, 得到Ni--30Cr合金的钝化膜表面生成的Cr的氧化物和氢氧化物比例较大, 分别为4.840%和4.130%, 高于其它Ni--Cr合金; 同时对Ni-Cr合金在不同浓度NaCl溶液中的点腐蚀机理进行了探讨。
关键词 材料失效与保护Ni--Cr合金极化曲线交流阻抗XPS测试NaCl溶液    
Abstract:Corrosion–resistant performance of Nickel-based alloys with different Cr contents in Cl−ions solution was studied by using electrochemical techniques. The results showed that the resistant of the electrochemical corrosion was improved with the increasing of Cr contents in the Nickel–based alloy. The concentration of the Cl−ion solution had greatly influence on the corrosion resistance of Ni–9Cr, Ni–15Cr and Ni–20Cr alloys. Especially, the corrosion resistance of Ni–9Cr alloy was the most serious in 0.6mol/L NaCl solution. The passive film on the surface of the Nickel-based alloys in 0.6mol/L NaCl solution was analyzed by using the XPS testing technology. It was found that the proportion of Cr–oxide and hydrogen that formed on passive film surface of Ni–30Cr alloy were 4.840 and 4.130 mass percent, respectively, exceeding the other Ni–Cr alloys. Meanwhile, the mechanism of the pitting corrosion for Ni–Cr alloy in the different concentration of NaCl solution was discussed.
Key wordsmaterials failure and protection    Ni–Cr alloy    Polarization curves    AC impedance    XPS tested    NaCl solution
收稿日期: 2010-12-16     
ZTFLH: 

TG174

 
基金资助:

国家自然科学基金50571108资助项目。

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