Abstract
The present study estimates the corrosion and wetting properties of sputter deposited osbornite titanium nitride (O-TiN) coating onto a stainless steel (SS-304). The wettability, surface morphology, chemical composition and corrosion characteristics of the treated samples were studied in detail. The performances of the O-TiN@SS-304 coating were compared to polished SS-304 substrate. The results show that the nano-cluster growth of O-TiN coating alter the hydrophilic surface (θw ~ 78.2°) of SS-304 into hydrophobic surface (95.4°), which promote the aqueous passivation behavior. The corrosion testing for a long-term immersion (6 h) illustrated that the coated sample shows greater corrosion resistance than the SS-304. This greater corrosion resistance is accountable for low degree of corrosion rate of around 16.7 × 10−3 mm/year of the coated sample. Therefore, the O-TiN nano-cluster coating with a homogeneously ordered hydrophobic surface is projected as a long-lasting, stable and corrosion resistive for industries, when immersed in salinity media [3.5% NaCl] and useful for extending the protecting applications in other relevant material fields.
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