Corrosion mechanisms in model binary metallic glass coatings on mild steel and correlation with electron work function
Corrosion mechanisms in model binary metallic glass coatings on mild steel and correlation with electron work function
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DOI：
10.1016/j.corsci.2022.110578
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发表时间：
2022-10-01
影响因子：
8.3
通讯作者：
Mukherjee, Sundeep
中科院分区：
文献类型：
--
作者：
Mahajan, Chaitanya;Hasannaeimi, Vahid;Mukherjee, Sundeep
研究了化学成分简单、应用广泛的Ni-P和Co-P金属玻璃镀层的化学变化对其腐蚀机理和钝化膜性能的影响。磷含量的增加导致耐蚀性的提高。结果表明，腐蚀表面存在次亚磷酸盐和磷酸根离子。在钝化层中观察到磷的富集，这可能促进了次亚磷酸盐阴离子保护层在溶解过程中的恢复。建立了电子结构与耐蚀性之间的关系，相对功函数随磷含量的增加而增大。
Effect of chemistry change on corrosion mechanisms and passive film characteristics of model Ni-P and Co-P metallic glass coatings on mild steel was studied because of their simple chemistry and widespread use. Increase in phosphorus content led to improved corrosion resistance. Results indicated the presence of hypophosphite and phosphate anions on the corroded surfaces. Enrichment of phosphorus in the passive layer was observed, which likely promoted the restoration of the protective hypophosphite anion layer during dissolution. A correlation between electronic structure and corrosion resistance was established, with relative work function increasing with increase in phosphorus content.