Good-quality bilayer coatings with a carbon interlayer and outer carbonate hydroxyapatite layer are obtained on AISI 316L stainless steel substrate using RF PACVD and sol-gel methods. It is found that protective properties of both composite C/HAP coating and HAP coating depend on the temperature of heat treatment. Hydroxyapatite with a carbon interlayer coating annealed at 500°C significantly improves corrosion resistance of the stainless-steel substrate as well as of unary carbon and HAP coatings. The composite C/HAP coating annealed at 500°C exhibits better corrosion resistance in comparison with the HAP coating heated at the same temperature. Stainless-steel substrates with a HAP and C interlayer heated at 700°C have worse corrosion features in comparison with uncoated AISI 316L. The weak corrosion resistance of this sample is due to the formation of metal carbides at this temperature.
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Published in Poroshkovaya Metallurgiya, Vol. 49, No. 7–8 (474), pp. 126–132, 2010.
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Pietrzyk, B., Gawronski, J. & Blaszczyk, T. Effect of carbon interlayer on protective properties of hydroxyapatite coating deposited on 316L stainless steel by sol-gel method. Powder Metall Met Ceram 49, 468–473 (2010). https://doi.org/10.1007/s11106-010-9260-2
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DOI: https://doi.org/10.1007/s11106-010-9260-2