Preliminaries of the Decay of Metals versus Petroleum Oils

Petroleum oils are predominantly made of various hydrocarbons with trace compounds including corrosive aidedcompounds that basically known as the salts, organic acids and various forms of sulfur. The scope of the current researchwas based on the investigations of the effect of salts, organic, elemental sulfur and Mercaptans of crude oils on thecorrosion rates of seven different types of ferrous metals that important in the industry of crude oil refining. As theprocedure the important corrosive properties of two different selected crude oils and the chemical compositions of theselected ferrous metals were analyzed by the standard instruments and methods. There were determined the corrosionrates of prepared metal coupons from selected ferrous metals with the similar dimensions after certain immersion timeperiods with respect to both crude oils by the weight loss method while analyzing the corroded metal surfaces through themicroscope also simultaneously analyzed the decayed metallic elemental concentrations from metals into crude oils andthe variations of initial hardness of the metals. As the foremost outcomes of the existing analysis there were obtained thesignificantly lower corrosion rates from stainless steels which are having at least 12% of chromium with sufficient amountif 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 offerrous from some of carbon steels and slight reductions of the initial hardness of metals after the formations of thecorrosion on the metal surfaces.