Surface Analytical Examinations of Welded Nickel Alloys by XPS, SNMS and SEM/EDX

摘要

Tarnish layers are formed in the heat affected zone during the welding of steels and nickel based alloys. They commonly consist of oxides of the alloying elements. The corrosion behaviour of welded components is generally influenced by the thickness and composition of the oxide films. In the following the corrosion behaviour of annealed samples cut from NiMo28 and NiMol6Crl6Ti is investigated, correlating XPS, SNMS and SEM/EDX data to their pitting corrosion potentials.