The Impact of the Corrosiveness of Crude Oils on the Metallic Corrosion

Abstract

Corrosion is a natural phenomenon which is linked with the ferrous metals and the supporting environment as well. Especially it is possible to find in the industry of crude oil refining because of the vast applications of the ferrous metals and the corrosiveness of the crude oils. According to the scope of the current research there were expected to investigate the impact of two different types of crude oils on the corrosion attributes of seven different types of ferrous metals. In the methodology of this research the chemical compositions of selected metals, dominant corrosive properties of both crude oils, corrosion rates of similar sized prepared metal coupons after certain immersion time periods in crude oils, qualitatively analysis of the corroded metals surfaces, decay of metallic elements from metals into crude oils and the reductions of the initial hardness of metal coupons after the corrosion were tested by the standard methodologies and instruments also determined some necessary parameters. The obtained results showed the relatively lower corrosion in stainless steels when comparing with other metals, relatively higher impact from the salts on the metallic corrosion than the impact of the organic acids or possible to occur some effects from unknown compound, formations of FeS, Fe2O3, corrosion cracks and cavities, significant decay of ferrous and copper from some metals in to crude oils and the slight reductions of the initial hardness of metal coupons due to the corrosion