Welds of dissimilar steel 1.0038/1.4301: increasing corrosion resistance by the optimization of welding parameters and post-weld processing

Abstract

The corrosion of exploited motor vehicles and important or potentially dangerous structures is not a new problem of engineering [1]. However, nowadays, it still remains one of the most burning questions of manufacturing welding structures. There are a number of established methods and technological solutions allowing improvements to the premature corrosion resistance of exploited welded joints and structural elements. In the majority of cases, different protective coatings are used. However, protective coatings are not applicable for some structures in food and medical industry as well as for some other big dissimilar-material structures of a complicated shape. In such cases, the corrosion resistance of welded structures may be provided by other technological means. The present research is aimed at investigating the efficiency of such methods. Several different welding technological solutions and post-weld surface treatments have been applied. The corrosion resistance of the obtained welded joints has been evaluated conducting tests on corrosion under laboratory conditions. The obtained results and conclusions of the present research may be useful for manufacturers solving the problems of the corrosion resistance of welded dissimilar-steel structures.