Abstract The replacement of chrome coatings for materials that maintain the same properties has become the Co-W alloy relevant. In this context, we proposed to evaluate the effects of the Co and W concentration in the electrolytic bath on the faradaic efficiency, morphology, and anticorrosive property of the Co-W alloy. The diffractograms indicated a tendency to amorphization when the W concentration increased from 0.1 to 0.3 M, and the faradaic efficiency achieved values close to 70%. Alloy surfaces demonstrated a homogeneous composition according to the energy-dispersive X-ray mapping. The increase of Co and W concentration promoted the formation of rounded structures and reduced the space between the microcracks. Moreover, the high concentration of these promoted greater corrosion resistance with a corrosion current density of 1.83 µA cm−2.

中文翻译：

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钨钴浓度对钴钨合金显微组织和防腐性能的影响

摘要 用铬涂层替代保持相同性能的材料已成为与 Co-W 合金相关的材料。在此背景下，我们建议评估电解槽中 Co 和 W 浓度对 Co-W 合金法拉第效率、形貌和防腐性能的影响。衍射图表明当 W 浓度从 0.1 增加到 0.3 M 时有非晶化趋势，法拉第效率达到接近 70% 的值。根据能量色散 X 射线映射，合金表面显示出均匀的成分。Co和W浓度的增加促进了圆形结构的形成并减少了微裂纹之间的空间。此外，这些物质的高浓度促进了更高的耐腐蚀性，腐蚀电流密度为 1.83 µA cm-2。