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.
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