EFFECTS OF PULSE WIDTH ON CORROSION BEHAVIOR OF DIAMOND-LIKE CARBON COATINGS PREPARED ON THE SURFACE OF HIGH NITROGEN NICKEL-FREE STAINLESS STEEL

Jilong Qi, Dongxu Chen, Yanan Wang, Yanwen Zhou and Peng Gao
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Jilong Qi: School of Material and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, P. R. China†State Key Laboratory of Marine, Equipment Steel and its Application, Anshan Iron and Steel Research Institute, AnGang Group, P. R. China
Dongxu Chen: School of Material and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, P. R. China
Yanan Wang: School of Material and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, P. R. China
Yanwen Zhou: School of Material and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, P. R. China
Peng Gao: #x2020;State Key Laboratory of Marine, Equipment Steel and its Application, Anshan Iron and Steel Research Institute, AnGang Group, P. R. China

Surface Review and Letters (SRL), 2021, vol. 28, issue 05, 1-11

Abstract: Effects of different pulse widths on morphologies and corrosion resistance of diamond-like carbon (DLC) coatings prepared on the surface of high nitrogen nickel-free stainless steel (HNSS) were investigated. It was found that different pulse widths of 10, 15 and 20μs mainly affect the porosity and internal stress within the coatings. The energies of the implantation ions were decreased as the pulse width increase. The growth mechanism of the coating with the pulse width of 20μs was mainly surface diffusion, in which the coating was porous and prone to corrosion. With the decrease of pulse width, the growth mechanism was mainly sub-plantation. The DLC coating became dense and the corrosion resistance was improved significantly. However, with further decrease of pulse width, internal stress within the coating was also increased. The effect of stress corrosion cracking may decrease the corrosion resistance of the DLC coating with the pulse width of 10μs. The influencing mechanisms of the pulse width on corrosion resistance and growth mechanism of DLC coating on the surface of HNSS are also discussed.

Keywords: High nitrogen nickel-free stainless steel; plasma enhanced chemical vapor deposition; diamond-like carbon coating; electrochemical corrosion; growth mechanism (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0218625X21500323

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