Critical Factors Affecting Naphthenic Acid Corrosion and Their Interactions

The background and status together with the mechanism of naphthenic acid corrosion in oil refining industry are introduced.Four critical affecting factors,including acid number (naphthenic acid content),sulfur content,temperature and velocity,are briefly discussed,and their interactions are analyzed along with structural materials and crude oil types.It is suggested that unified and reasonable technical regulations for research and testing should be established.Specific analysis toward each case should be made in order to obtain reliable and comparable data for practical references.