Efeito dos parâmetros de soldagem em revestimentos a base de níquel nas medidas eletroquímicas de corrosão

Abstract

Metallic materials are widely used in industry, including API 5L X70 steel, used for oil transportation. However, these steels are susceptible to corrosion due to the aggressive environment. As a result, various studies have been carried out to mitigate the effect of corrosion. Solid wire welding processes are used to weld coatings for this purpose, but they require information from the user to determine the most suitable welding conditions. The aim of this work was to study the influence of welding parameters for Inconel 625-based coatings on electrochemical corrosion measurements. To optimize the experiments, a full factorial design was used to evaluate the welding parameters, welding speed and feed rate. After welding, the samples were cross-sectioned and dilution calculations and iron content measurements were made by EDX. Finally, to reveal the corrosion resistance, the electrochemical technique by linearpotentiodynamic polarization was used, through polarization resistance, corrosion potential, corrosion current.