W颗粒/Zr41.2Ti13.8Cu12.5Ni10Be22.5基非晶复合材料在3%NaCl溶液中的腐蚀行为研究

Corrosion Behavior of W Particles/Zr41.2Ti13.8Cu12.5Ni10Be22.5 Metallic Glass Matrix Composite in 3%NaCl Solution

通过电化学测试、浸泡实验以及表面分析,研究了50%体积含量的W颗粒/Zr41.2Ti13.8Cu12.5Ni10Be22.5基非晶复合材料在3%(质量分数)NaCl溶液中的腐蚀行为。结果表明:在3%NaCl溶液中,该复合材料表面由于W颗粒与非晶合金基体相的偶对效应而形成了局部腐蚀微电池,其中非晶基体部位作为局部阳极区其表面的腐蚀溶解加速,复合材料的腐蚀电流密度增大,其耐蚀性能明显低于Zr41.2Ti13.8Cu12.5Ni10Be22.5非晶合金。50%W颗粒的加入对该复合材料的耐点蚀性能基本没有影响,在3%NaCl溶液中基体非晶部位发生了均匀的腐蚀溶解,该非晶复合材料具有较好的耐点蚀性能。

The corrosion behavior of 50%(volume fraction)W particles/Zr41.2Ti13.8Cu12.5Ni10Be22.5 metallic glass matrix composite in 3%(mass fraction)NaCl solution was studied by electrochemical test,immersion test and surface analysis.The result showed that:in 3%NaCl solution,local corrosion microcells were formed on the surface of the composite due to the coupling effect of W particles and metallic glass matrix,the corrosion dissolution on the surface of metallic glass matrix is intensified as a local anodic zone,the corrosion current density of the composite increased,and the corrosion resistance of the composite is significantly lower than that of Zr41.2Ti13.8Cu12.5Ni10Be22.5 metallic glass.The incorporation of 50%W particles have no effect on the pitting resistance of the composite,the uniform corrosion dissolution occurs in the metallic glass site of the composite in 3%NaCl solution,and the composite has better pitting resistance.