{"title":"Synergistic mechanism of HVOF coating and PVD film in tribo-corrosion behaviors of Cr3C2-NiCr/DLC duplex coatings","authors":"Zihan Feng , Ruirui Liang , Shuang Liang , Dongqing He , Lunlin Shang","doi":"10.1016/j.diamond.2025.112124","DOIUrl":null,"url":null,"abstract":"<div><div>The Cr<sub>3</sub>C<sub>2</sub>-NiCr/DLC duplex coating was successfully prepared on 316 L stainless steel through a combined method of high-velocity oxygen-fuel (HVOF) spraying and physical vapor deposition (PVD). The tribo-corrosion features of Cr<sub>3</sub>C<sub>2</sub>-NiCr coating, DLC film, and Cr<sub>3</sub>C<sub>2</sub>-NiCr/DLC duplex coatings in a 3.5 wt% NaCl solution were contrastively investigated. Tribo-corrosion tests were conducted under OCP (Open Circuit Potential) conditions, polarization conditions, and cathodic protection conditions, respectively. It was found that the tribo-corrosion resistance of the Cr<sub>3</sub>C<sub>2</sub>-NiCr/DLC duplex coatings was mainly associated with the synergistic effect of the top DLC film and the Cr<sub>3</sub>C<sub>2</sub>-NiCr intermediate layer. The Cr<sub>3</sub>C<sub>2</sub>-NiCr intermediate layer can provides robust support for the top DLC film, while the DLC film effectively seals the Cr<sub>3</sub>C<sub>2</sub>-NiCr intermediate layer, collectively enhancing the tribo-corrosion resistance of that duplex coatings. Notably, this duplex coating exhibits superior tribo-corrosion resistance, with a wear rate of 4.89 × 10<sup>−7</sup> mm<sup>3</sup>/N·m. However, the Cr<sub>3</sub>C<sub>2</sub>-NiCr coating demonstrates the worst resistance to tribo-corrosion, with a wear rate of 1.83 × 10<sup>−5</sup> mm<sup>3</sup>/N·m. During the tribo-corrosion process, the material loss of the Cr<sub>3</sub>C<sub>2</sub>-NiCr coatings is mainly caused by the interaction between corrosion and wear, whereas the material loss of the DLC film and the Cr<sub>3</sub>C<sub>2</sub>-NiCr/DLC coatings is mainly attributed to mechanical wear. In summary, the excellent property of the Cr<sub>3</sub>C<sub>2</sub>-NiCr/DLC duplex coatings were proved.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112124"},"PeriodicalIF":5.1000,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Diamond and Related Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0925963525001815","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, COATINGS & FILMS","Score":null,"Total":0}
引用次数: 0
Abstract
The Cr3C2-NiCr/DLC duplex coating was successfully prepared on 316 L stainless steel through a combined method of high-velocity oxygen-fuel (HVOF) spraying and physical vapor deposition (PVD). The tribo-corrosion features of Cr3C2-NiCr coating, DLC film, and Cr3C2-NiCr/DLC duplex coatings in a 3.5 wt% NaCl solution were contrastively investigated. Tribo-corrosion tests were conducted under OCP (Open Circuit Potential) conditions, polarization conditions, and cathodic protection conditions, respectively. It was found that the tribo-corrosion resistance of the Cr3C2-NiCr/DLC duplex coatings was mainly associated with the synergistic effect of the top DLC film and the Cr3C2-NiCr intermediate layer. The Cr3C2-NiCr intermediate layer can provides robust support for the top DLC film, while the DLC film effectively seals the Cr3C2-NiCr intermediate layer, collectively enhancing the tribo-corrosion resistance of that duplex coatings. Notably, this duplex coating exhibits superior tribo-corrosion resistance, with a wear rate of 4.89 × 10−7 mm3/N·m. However, the Cr3C2-NiCr coating demonstrates the worst resistance to tribo-corrosion, with a wear rate of 1.83 × 10−5 mm3/N·m. During the tribo-corrosion process, the material loss of the Cr3C2-NiCr coatings is mainly caused by the interaction between corrosion and wear, whereas the material loss of the DLC film and the Cr3C2-NiCr/DLC coatings is mainly attributed to mechanical wear. In summary, the excellent property of the Cr3C2-NiCr/DLC duplex coatings were proved.
期刊介绍：
DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices.
The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.
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