S2O2-3对Cu-15Ni-8Sn合金在NaCl溶液中点蚀的影响
Effect of S2O2-3 on Pitting Corrosion of Cu-15Ni-8Sn Alloy in Sodium Chloride Solutions
摘 要
采用动电位极化法对Cu-15Ni-8Sn合金的点蚀行为进行了研究，结果表明，在不同浓度的NaCl(0.01%，0.1%，1%和10%)溶液中，随着Cl-浓度的增大，Cu-15Ni-8Sn合金试样的耐点蚀性能下降，蚀孔半径显著增加。当向NaCl溶液中加入较低浓度(0.001，0.01，0.1 mol/L)的Na2S2O3时，Cu-15Ni-8Sn合金试样的点蚀敏感性降低，点蚀受到明显抑制。而当Na2S2O3的加入浓度逐渐升高到1 mol/L时，Cu-15Ni-8Sn合金试样耐点蚀性能没有提高。
点蚀
S2O32-
Cu-15Ni-8Sn alloy
pitting corrosion
S2O32-
Abstract
The pitting corrosion of Cu-15Ni-8Sn alloy in solutions containing different concentrations of NaCl was studied by potentiodynamic polarization method. The results showed that with the increase of Cl- the radius of pits increased significantly, which indicating the decrease of the pitting corrosion resistance of the alloy. Addition of low concentration of Na2S2O3 into the NaCl solution, e.g. 0.001 mol/L, 0.01 mol/L and 0.1 mol/L, can inhibit the pit formation on the alloy surface. However, this inhibiting effect was eliminated when the concentration of Na2S2O3 increased to 1mol/L.
中图分类号 TG174
所属栏目 试验研究
基金项目 国家重点基础研究发展973计划(2014CB643306); 国家自然科学基金(51101098; 51303188); 上海市科委创新行动计划项目(12231204102)
收稿日期 2014/1/10
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备注张丽(1974-),副教授,博士,从事极端环境下材料的腐蚀与防护技术研究工作,
引用该论文: SHEN Yuan-yuan,ZHANG Li,YIN Bing,DONG Li-hua,YIN Yan-sheng. Effect of S2O2-3 on Pitting Corrosion of Cu-15Ni-8Sn Alloy in Sodium Chloride Solutions[J]. Corrosion & Protection, 2014, 35(9): 884
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【11】IOFA Z A. Mechanism of the effect of hydrogen sulfide and inhibitors on iron corrosion in acid solutions[J]. Protection of Metal,1980(16):220-225.
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