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Hot Corrosion Behaviour of Laser Melted Gp1 Stainless Steel Powder in a Molten Chloride and Sulphide Environment
A. Kurian, M. SIVA Prasad, A. Ajith, T.J. Cijesh, M.G. Deepu and B. George

This paper focuses mainly on the hot corrosion behaviour of laser melted GP1 stainless steel powder using pulsed Nd:YAG laser. The objectives of this study were to analyse the morphology, phase composition and the oxidation kinetics of the laser melted GP1 stainless steel specimen exposed to molten salt environment at high temperature. The surface characteristics of hot corroded specimens were methodically analysed using tools like microscopic inspection and X-ray diffraction (XRD). Parabolic law based oxidation kinetics was revealed by this study and these results are helpful to understand the hot corrosion mechanism in additive manufacturing processes involving powder melting by laser beam.

Keywords: Nd:YAG laser, GP1 stainless steel, powder, chloride, sulphide, laser melting, high temperature corrosion, molten salt environment

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