Rainer Gadow

Hot Corrosion Resistance of La2Zr2O7 Coat on Stainless Steel Alloy

In the present study, La2Zr2O7 was used as a coat for stainless steel alloy. Lanthanum zirconate coat was sprayed using plasma spray technique. The preparation and characterization of La2Zr2O7 coat was studied. Hot corrosion of the coat surface was conducted in (1:1) V2O5 / Na2SO4 molten mixture at 900°C for 50 and 100 h. The results showed that molten mixture of V2O5 / Na2SO4 attacks La2Zr2O7 coat heavily after 100 h. Depending on the nature of molten salt, La2Zr2O7 can considered either a strong basic oxide or strong acidic oxide. Keywords— Plasma coating, Lanthanum zirconate, Hot corrosion resistance Salma M. Naga/ Professor Ceramics Dept/National Research Center Egypt M. Awaad/ Professor Ceramic Dept/National Research Center Egypt Hesham. F. El-Maghraby/ PhD Ceramics Dept/National Research Center Egypt Ahmed. M. Hassan/ PhD Faculty of Engineering/Zagazig university Egypt Mohamed Elhoriny/ MSc Graduate School of Excellence Advanced Manufacturing Engineering (GSaME)/ Stuttgart University Andreas Killinger / Professor Institute for Manufacturing Technologies of Ceramic Components and Composites (IMTCCC)/ Stuttgart University Rainer Gadow/ Professor Institute for Manufacturing Technologies of Ceramic Components and Composites (IMTCCC)/ Stuttgart University