Abstract Electrodeposited nanocrystalline and conventional polycrystalline NiFe alloys of similar iron content were investigated to understand the effect of grain size on the corrosion behaviour of these materials. Potentiodynamic polarization testing in 1 N H 2 SO 4 revealed similar active-passive-transpassive behaviour with negligible differences in the Tafel and transpassive regions regardless of grain size. It is shown that differences in the region of active dissolution are the result of strong contributions of sulfur impurities in the nanocrystalline electrodeposits rather than being due to grain size alone.

中文翻译：

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电沉积纳米晶镍铁 (NiFe) 合金在稀 H 2 SO 4 中的腐蚀行为

摘要 研究了具有相似铁含量的电沉积纳米晶和常规多晶 NiFe 合金，以了解晶粒尺寸对这些材料腐蚀行为的影响。1 NH 2 SO 4 中的动电位极化测试揭示了类似的主动-被动-跨被动行为，无论晶粒大小如何，Tafel 和跨被动区域的差异都可以忽略不计。结果表明，活性溶解区域的差异是纳米晶电沉积物中硫杂质的强烈贡献的结果，而不仅仅是由于晶粒尺寸。