Journal
DIAMOND AND RELATED MATERIALS
Volume 80, Issue -, Pages 153-161Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.diamond.2017.11.001
Keywords
Diamond-like carbon; Plasma CVD; Polarization; Electrochemical impedance spectroscopy; Passive film; Corrosion
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Funding
- Brazilian Agency Capes
- Brazilian Agency BNDES
- Whirlpool S/A Embraco
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In this paper, the corrosion resistance of nitrided and diamond-like carbon (DLC)-coated SAE 1020 steel samples was investigated. The DLC coating was deposited after plasma-nitriding. The structure and composition of different phases of the samples were characterized by Vickers micro-hardness, scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. The corrosion behavior of the samples was investigated by electrochemical methods using a 0.1 mol L-1 H2SO4 solution. The results obtained from sample characterization agreed well with those obtained from electrochemical corrosion methods. The 500-W DLC coating exhibited the best corrosion -resistance. The DLC-coated samples showed better corrosion-resistance than uncoated samples.
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