中文摘要：

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Cr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0．6mol／LNaCl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0．6mol／LNaCl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。

英文摘要：

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-gCr, Ni-15Cr and Ni-20Cr alloys. Especially, the corrosion resistance of Ni-gCr alloy was the most serious in 0.6mol/L NaCI solution. The passive film on the surface of the Nickel-based alloys in 0.6mol/L NaCI 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 NaCI solution was discussed.