Electrochemical Methods for Characterisation of Thermal Spray Corrosion Resistant Stainless Steel Coatings

摘要: The use of thermal spray stainless steel coatings for protection low alloyed steels against different types corrosion is limited due to high porosity levels and oxide inclusions. In this paper electrochemical methods like potential monitoring cyclic voltammetry are reported monitor the resistance coatings. studied AISI 316 deposited by arc spraying, plasma spraying or velocity oxygen fuel (HVOF) spraying. tests performed in a 0.5 M H2SO4 solution. It found that none tested had an response equal alloy 316. results indicate HVOF coating has highest can be improved inert argon atmosphere. independent substrate type (including case no substrate), indicating underlying does not contribute process only itself attacked. age rapidly proposed pore opening widening.