The implementation of a duplex process, which combines plasma nitriding with hard coatings obtained by cathodic arc, on stainless steel substrates has faced adhesion problems that affected the wear and corrosion behavior of the treated surfaces. One variation of the cathodic arc process, which could improve the adhesion, is its combination with plasma ion implantation.

This work presents results of the wear and corrosion behavior of duplex TiTiN bilayer coatings obtained by cathodic arc deposition combined with ion implantation (PBII&D) on plasma nitrided AISI 316 L stainless steel In order to compare the application of PBII&D in duplex processes against conventional cathodic arc deposition, other two types of samples were obtained; one group of samples was coated using the same experimental device with the substrate at floating potential and the other one with a commercial PVD system.

The coatings were characterized by SEM, XRD, and nanoindentation. The adhesion was evaluated by the Scratch Test and Rockwell C indentation. The wear resistance was analyzed by the pin-on-disk test and the corrosion behavior was evaluated by means of anodic polarization tests in NaCl solution, as well as by the Salt Spray Fog Test.

The PBII&D bilayer coatings showed better adhesion while the commercial PVD TiN coatings presented the smallest wear volume loss, but the delamination inside and around the track evidenced adhesion problems. Corrosion resistance was improved in all coatings benchmarked against nitride substrates, but PBII&D processes offered better protection.

在不锈钢基板上实施将等离子体渗氮与通过阴极电弧获得的硬质涂层相结合的双工工艺面临着粘附问题，该问题影响了被处理表面的磨损和腐蚀行为。阴极电弧工艺的一种变体可以与等离子体离子注入相结合，可以提高附着力。

这项工作介绍了在等离子氮化的AISI 316 L不锈钢上通过阴极电弧沉积结合离子注入（PBII＆D）获得的双相TiTiN双层涂层的磨损和腐蚀行为的结果，以便比较PBII＆D在双相工艺中与常规阴极电弧的应用沉积，获得了其他两种类型的样品；一组样品使用相同的实验设备进行涂覆，基材处于浮置电位，另一组样品使用商用PVD系统。

通过SEM，XRD和纳米压痕对涂层进行表征。通过划痕试验和洛氏C压痕评价粘附力。通过销钉盘测试分析耐磨性，并通过在NaCl溶液中的阳极极化测试以及盐雾测试来评估腐蚀行为。

PBII＆D双层涂层表现出更好的附着力，而商用PVD TiN涂层表现出最小的磨损量损失，但是赛道内部和周围的分层证明存在粘合问题。在所有以氮化物为基准的涂层中，耐腐蚀性均得到了改善，但是PBII＆D工艺提供了更好的保护。