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Synergistic mechanism of HVOF coating and PVD film in tribo-corrosion behaviors of Cr3C2-NiCr/DLC duplex coatings.

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Title: Synergistic mechanism of HVOF coating and PVD film in tribo-corrosion behaviors of Cr3C2-NiCr/DLC duplex coatings.
Authors: Feng, Zihan1 (AUTHOR), Liang, Ruirui1 (AUTHOR), Liang, Shuang1 (AUTHOR), He, Dongqing1 (AUTHOR) dqhe@lut.edu.cn, Shang, Lunlin1,2 (AUTHOR) shangll@licp.cas.cn
Source: Diamond & Related Materials. Apr2025, Vol. 154, pN.PAG-N.PAG. 1p.
Subjects: Physical vapor deposition, Mechanical wear, Cathodic protection, Stainless steel, Diamond-like carbon, Surface coatings, Tribo-corrosion
Abstract: The Cr 3 C 2 -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 3 C 2 -NiCr coating, DLC film, and Cr 3 C 2 -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 3 C 2 -NiCr/DLC duplex coatings was mainly associated with the synergistic effect of the top DLC film and the Cr 3 C 2 -NiCr intermediate layer. The Cr 3 C 2 -NiCr intermediate layer can provides robust support for the top DLC film, while the DLC film effectively seals the Cr 3 C 2 -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 Cr 3 C 2 -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 Cr 3 C 2 -NiCr coatings is mainly caused by the interaction between corrosion and wear, whereas the material loss of the DLC film and the Cr 3 C 2 -NiCr/DLC coatings is mainly attributed to mechanical wear. In summary, the excellent property of the Cr 3 C 2 -NiCr/DLC duplex coatings were proved. [Display omitted] • HVOF/PVD duplex design significantly improved the tribo-corrosion resistance of DLC films. • Synergistic mechanisms between HVOF coating and PVD film were clarified from the aspects of anti-corrosion and anti-wear. • Interaction mechanisms between corrosion and wear of duplex coatings were quantitatively studied. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:The Cr 3 C 2 -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 3 C 2 -NiCr coating, DLC film, and Cr 3 C 2 -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 3 C 2 -NiCr/DLC duplex coatings was mainly associated with the synergistic effect of the top DLC film and the Cr 3 C 2 -NiCr intermediate layer. The Cr 3 C 2 -NiCr intermediate layer can provides robust support for the top DLC film, while the DLC film effectively seals the Cr 3 C 2 -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 Cr 3 C 2 -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 Cr 3 C 2 -NiCr coatings is mainly caused by the interaction between corrosion and wear, whereas the material loss of the DLC film and the Cr 3 C 2 -NiCr/DLC coatings is mainly attributed to mechanical wear. In summary, the excellent property of the Cr 3 C 2 -NiCr/DLC duplex coatings were proved. [Display omitted] • HVOF/PVD duplex design significantly improved the tribo-corrosion resistance of DLC films. • Synergistic mechanisms between HVOF coating and PVD film were clarified from the aspects of anti-corrosion and anti-wear. • Interaction mechanisms between corrosion and wear of duplex coatings were quantitatively studied. [ABSTRACT FROM AUTHOR]
ISSN:09259635
DOI:10.1016/j.diamond.2025.112124