Grooving Corrosion in Carbon Steel

Grooving corrosion in carbon steels is a specialized form of corrosion that exists for electric resistance welded piping subsequently exposed to aggressive waters. This welding process produces a redistribution of sulfides along the weld line. The result is a preferred attack in the weld area producing grooves in the material. Post weld heat treatments appear to influence grooving corrosion with temperatures of around 750ºC producing a higher susceptibility and higher temperatures, on the order of 1000ºC, decreasing susceptibility.