Inhibitors Used to Control Corrosion of Mild Steel in Crude Oil Recovery

Abstract

Industries first select construction materials on the basis of safety and cost-effectiveness. Physical requirements can be satisfied easily but corrosion effects seriously complicate the selection of suitable materials. The corrosion-mitigations can be enhanced by the coating of organic and inorganic substance but its costs must also be considered. The cost of material depends upon design and physical requirements of the material. The attractive facial appearance makes the material expensive. Initially materials face localized corrosion which is also known as general corrosion. Localized corrosion is more insidious form of deterioration under certain conditions. It can promote stress corrosion which leads to the cracking of materials. It is very difficult to detect localized corrosion early and to monitor it effectively. The use of corrosion inhibitors is a practical and economical method, which can be designed according to the environmental conditions. Industrial use of the corrosion inhibitors may exceed the budget amount. A recent survey estimated that the US industry spent $798 M (1.54 M tonne) on corrosion inhibitor chemicals in 1986. This paper attempts to provide details of chemical corrosion inhibitors as a broader introduction.