Naphthenic Acid Corrosion Resistance of Typical Refining and Chemical Materials

The corrosion mechanisms of some typical refining and chemical materials, including carbon steel, Cr5Mo, 304 and 316L stainless steels, aluminized steel and Ni-P chemical plating surface modification materials and so on, in naphthenic acid environments are summarized by thermodynamical and metallurgical analyses. The kinetic analyses of the major factors affecting the naphthenic acid corrosion, including the acid value of oil, operation temperature, fluid velocity and flow pattern, are also discussed.