Abstract The carbon film with electroless nickel interlayer (Ni + C) was fabricated to improve the corrosion resistance of the magnesium alloy GW83. Compared to other coatings used in this study, the dense Ni + C coating improved adhesion with the substrate. The corrosion potential ( E corr ) of the Ni + C coated magnesium alloy was about −1.37 V vs saturated calomel electrode (SCE) in contrast to about −1.67 V vs SCE of the bare one in 3.5 wt% NaCl solution. The corrosion current density was reduced from 186 μA cm −2 to 11 μA cm −2 . The 5 h immersion test revealed that the Ni + C coated magnesium alloy GW83 showed much less corrosion compared to the bare alloy. These evidences indicated that applying Ni + C coating could effectively improve the corrosion resistance of the magnesium alloy GW83.

中文翻译：

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化学镀镍夹层碳膜包覆镁合金的腐蚀行为

摘要 为了提高GW83镁合金的耐腐蚀性能，制备了具有化学镀镍夹层（Ni+C）的碳膜。与本研究中使用的其他涂层相比，致密的 Ni + C 涂层提高了与基材的附着力。与饱和甘汞电极 (SCE) 相比，Ni + C 涂层镁合金的腐蚀电位 ( E corr ) 约为 -1.37 V，而裸电极在 3.5 wt% NaCl 溶液中的腐蚀电位 (E corr) 约为 -1.67 V。腐蚀电流密度从186 μA cm -2 降低到11 μA cm -2 。5 小时的浸泡试验表明，与裸合金相比，Ni + C 涂层镁合金 GW83 的腐蚀要小得多。这些证据表明，应用Ni+C涂层可以有效提高GW83镁合金的耐腐蚀性能。