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首页> 外文期刊>Journal of Materials Engineering and Performance >Microstructure and Corrosion Behavior of CrN and CrSiCN Coatings
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Microstructure and Corrosion Behavior of CrN and CrSiCN Coatings

机译：CrN和CrSiCN涂层的组织和腐蚀行为

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摘要

Three CrN-based coatings were deposited on 17-4PH stainless steel substrate using plasma enhanced magnetron sputtering (PEMS) technique. The microstructure and corrosion resistance were evaluated to examine the effect of Si and C in the coatings. The three coating compositions were CrN(Cr_(0.69)N_(0.31)), CrSiCN-1 (Cr_(0.55)Si_(0.014)C_(0.14)N_(0.3)), and CrSiCN-2 (Cr_(0.43)Si_(0.037)C_(0.24)N_(0.3)). The testing results indicated that with the increase of Si concentration, the coating microstructure transformed from B1 structure to B1 + Si_3N_4 structure. All the three coating systems were subjected to electrochemical tests in 3.5% NaCl solution at room temperature. Potentiodynamic polarization results revealed that the CrSiCN-2 coating had a higher anodic current density and a lower corrosion potential when compared to the CrN and CrSiCN-1 coatings. Extended exposure in 3.5% NaCl caused several localized corrosion to the CrSiCN-2 coating due to the porous coating structure. Electrochemical impedance spectroscopic measurements demonstrated that the CrSiCN-1 has better corrosion resistance than CrN and CrSiCN-2.
机译：使用等离子增强磁控溅射（PEMS）技术将三种CrN基涂层沉积在17-4PH不锈钢基板上。评价了显微组织和耐腐蚀性，以检验硅和碳在涂层中的作用。三种涂层成分是CrN（Cr_（0.69）N_（0.31）），CrSiCN-1（Cr_（0.55）Si_（0.014）C_（0.14）N_（0.3））和CrSiCN-2（Cr_（0.43）S​​i_（ 0.037）C_（0.24）N_（0.3））。测试结果表明，随着Si浓度的增加，涂层的微观结构从B1结构转变为B1 + Si_3N_4结构。在室温下，所有三个涂层系统都在3.5％NaCl溶液中进行了电化学测试。电位动力学极化结果表明，与CrN和CrSiCN-1涂层相比，CrSiCN-2涂层具有更高的阳极电流密度和更低的腐蚀电位。由于多孔涂层结构，长时间暴露在3.5％NaCl中会导致CrSiCN-2涂层发生局部腐蚀。电化学阻抗谱测量表明，CrSiCN-1具有比CrN和CrSiCN-2更好的耐腐蚀性。

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