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Corrosion of a Zr-based Bulk Metallic Glass with Different Surface Finishing States

机译:具有不同表面光洁度状态的Zr基大块金属玻璃的腐蚀

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The Zr_(59)Ti_3Cu_(20)Al_(10)Ni_8 bulk metallic glass has been studied regarding the effect of surface finishing states on its anodic behavior in 0.01 M Na_2SO_4 (pH=7) without / with 0.01 M NaCl. The anodic response of the alloy ground to grid 4000 depends on the pre-immersion time at OCP during which the surface gradually passivates. Fine polishing with diamond suspension does not significantly alter the passivation properties. But fine polishing with SiO_2-based suspension may cause similar as 1 % HF etching a Cu enrichment at the alloy surface leading to an enhanced active dissolution. Fine polishing increases the pitting susceptibility.
机译:研究了Zr_(59)Ti_3Cu_(20)Al_(10)Ni_8块状金属玻璃的表面光洁度状态对其在0.01M Na_2SO_4(pH = 7)中/不使用0.01M NaCl的阳极行为的影响。合金对栅格4000的阳极响应取决于OCP在表面逐渐钝化的预浸时间。用金刚石悬浮液进行精细抛光不会显着改变钝化性能。但是,使用基于SiO_2的悬浮液进行精细抛光可能会导致与1%HF蚀刻类似的在合金表面的铜富集,从而导致活性溶解度提高。精细抛光会增加点蚀敏感性。

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