Corrosion-Free Stainless Steel Tube Welding

Abstract

In order to solve corrosion problems in the welded areas due to corrosive gases, we have been working on developing an ultraclean welding technology applied to high speed single path narrow bead welding with using a low Mn contents of the base material. Also we have obtained the Perfect Cr2O3 passive film on the welding point by using a supper ferritic stainless steel. Therefore, the corrosion resistance around the welded areas was drastically improved in comparison with the conventional welding method.