This course provides practical instructions for the welded fabrication of nickel alloys used in corrosion-resistant service. Aimed at welders, materials engineers, and design engineers, it explains how nickel alloys behave during welding, how to avoid defects that reduce corrosion resistance, how to select and qualify welding procedures, and how to design equipment that performs reliably in corrosive environments. It covers welding processes, joint preparation, contamination control, alloy groups, filler metal selection, fabrication of castings, and design strategies to minimise corrosion in service.