Mechanical And Chemical Resistivity Of Cmt Welded Joints

The paper deals with analyzing the quality of special welded joints made by "Cold Metal Transfer" or "CMT" welding method. The aim of the experiment is to determine the impact of CMT welding on corrosion degradation of the joint. For this purpose the combination of diverse materials was used. Aluminum alloy AlMg3 and hot-dip galvanized carbon steel were welded by CMT method with AlSi5 filler material. Due to different electrode potential of welded specimen the galvanic corrosion occurred. Selecting of proper coating prevents the degradation process. For correct choice of the coating layer parameters, recognizing of corrosion process behavior of CMT joint in corrosion degradation environment with consideration of mechanical strain loading is important. This work is focused on intensity of corrosion reaction analysis in order to invent the most suitable surface layer.