Abstract
Abstract The term “naphthenic acids” is a collective name for organic acids present in various crudes. It has been proved that while minor quantities of other organic acids are included, the main acids from naphthenic base crudes are saturated ring structures containing acid groups. The circumstances under which naphthenic acid corrosion occurs are analogous to those of sulfur corrosion. A practical differentiation between naphthenic acid and sulfur corrosion is possible on the basis of different corrosion phenomena. It would appear that the rate of naphthenic acid corrosion is dependent on the concentration of the naphthenic acids in the oil, operating temperature, fluid velocity and activity of the naphthenic acids. Of these factors fluid velocity seems to be the most important. Unfortunately the critical velocity values below which the corrosion rates become negligible are not yet known. Data are given to show the relationship between temperature and corrosion rates at selected locations in a high vacu...
Published Version
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