Preliminaries of the Decay of Metals versus Petroleum Oils

Abstract

Petroleum oils are predominantly made of various hydrocarbons with trace compounds including corrosive aided compounds that basically known as the salts, organic acids and various forms of sulfur. The scope of the current research was based on the investigations of the effect of salts, organic, elemental sulfur and Mercaptans of crude oils on the corrosion rates of seven different types of ferrous metals that important in the industry of crude oil refining. As the procedure the important corrosive properties of two different selected crude oils and the chemical compositions of the selected ferrous metals were analyzed by the standard instruments and methods. There were determined the corrosion rates of prepared metal coupons from selected ferrous metals with the similar dimensions after certain immersion time periods with respect to both crude oils by the weight loss method while analyzing the corroded metal surfaces through the microscope also simultaneously analyzed the decayed metallic elemental concentrations from metals into crude oils and the variations of initial hardness of the metals. As the foremost outcomes of the existing analysis there were obtained the significantly lower corrosion rates from stainless steels which are having at least 12% of chromium with sufficient amount if nickel, relatively higher corrosive impact from salts especially at the lower temperatures, formations of ferrous sulfides, ferrous oxides, corrosion cracks and pitting corrosion, significantly decay of copper from Monel metal, higher decay of ferrous from some of carbon steels and slight reductions of the initial hardness of metals after the formations of the corrosion on the metal surfaces.