Abstract The electrochemical behavior of single-layer CrN and nanostructured multilayer ZrN/CrN coatings, deposited on AISI 304 by arc-physical vapor deposition (Arc-PVD) process, was investigated in 3.5 wt.% NaCl solution using impedance and polarization measurements. The microstructure of both coatings were analyzed using a field emission scanning electron microscope. The polarization measurements showed that for the nanostructured multilayer ZrN/CrN coating, the corrosion potential shifted to greater potentials in comparison to the single layer CrN. In addition, the density of the corrosion current decreased for the nanostructured multilayer ZrN/CrN coating which represents a higher resistance to corrosion. The nanostructured multilayer ZrN/CrN coating demonstrated a superior corrosion resistance compared to the CrN single layer coating. The mean values of elastic modulus and hardness of the nanostructured multilayer ZrN/CrN coating were larger than those of the single layer CrN coating. Also, surface roughness (Ra) of the nanostructured multilayer ZrN/CrN coating was less than the single layer CrN.

中文翻译：

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比较单层 CrN 涂层与纳米结构多层 ZrN/CrN 涂层在 3.5 wt.% NaCl 溶液中的表面表征和电化学性能的研究

摘要 在 3.5 wt.% NaCl 溶液中使用阻抗和极化测量研究了通过电弧物理气相沉积 (Arc-PVD) 工艺沉积在 AISI 304 上的单层 CrN 和纳米结构的多层 ZrN/CrN 涂层的电化学行为。使用场发射扫描电子显微镜分析两种涂层的微观结构。极化测量表明，对于纳米结构的多层 ZrN/CrN 涂层，与单层 CrN 相比，腐蚀电位转移到更大的电位。此外，纳米结构的多层 ZrN/CrN 涂层的腐蚀电流密度降低，代表更高的耐腐蚀性。与 CrN 单层涂层相比，纳米结构的多层 ZrN/CrN 涂层表现出优异的耐腐蚀性。纳米结构多层ZrN/CrN涂层的弹性模量和硬度平均值大于单层CrN涂层的弹性模量和硬度平均值。此外，纳米结构的多层 ZrN/CrN 涂层的表面粗糙度 (Ra) 小于单层 CrN。