Chapter 3

Corrosion by High Acid Crude Oil

As oil processing temperatures increase, naphthenic acids exhibit significant corrosivity, inducing the specific corrosion type termed naphthenic acid corrosion. The nature of this type of corrosion and the factors controlling it are still incompletely understood. Therefore, despite the numerous efforts to prevent or mitigate corrosion made in the last several decades, the problem of corrosion remains acute and ever-present. It is noted that there are two reasons behind this situation: the extreme complexity and interplay of the factors affecting the corrosion and erosion–corrosion processes. These factors are: (i) different corrosivity of crude oils, depending on the total add number (TAN) of the crudes, ...

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