Abstract
Crude oil is a mixture of hydrocarbons with some kinds of trace compounds including corrosive causing compounds. Corrosion is a severe consequence regarding the industry of crude oil refining. The scope of this research was to investigate the contributions of corrosive properties of both Murban and Das Blend crude oils on the corrosion rates of seven different types of ferrous metals which are obligatory in the crude oil refining industry. The sulfur contents, Mercaptans contents, organic acid contents and salt contents of both crude oils were tested by following the standard methodologies and recommended instruments. The elemental composition of each metal coupon was tested by the XRF detector. A batch of similar sized metal coupons was prepared and those metal coupons were immersed separately in both crude oils in homogeneous way. After 15, 30 and 45 days from the immersion the corrosion rates of each type of metal were determined by the relative weight loss method with the aid of a microscopic analysis. The decayed ferrous and copper concentrations in crude oil samples were tested by the atomic absorption spectroscopy (AAS) and the variations of the initial hardness of such metal coupons due to the corrosion were tested as confirmation stages of the formation of the corrosion. There were found some relatively lower corrosion rates from stainless steels with respect to both crude oils among other metals, higher corrosive impact from salts formations of FeS, Fe2O3 and some different trace compounds, higher ferrous and copper concentrations in some of crude oil samples and slight reductions of the initial hardness of most of metal coupons due to the corrosion as the foremost results of the existing research.
Highlights
Crude oil is a predominantly occurred as a mixture of hydrocarbons since having some trace chemical compounds that gives various behaviors to the relevant crude oils including the corrosive behaviors
Crude oil refining industry is a foremost industry that considered the corrosive matters as an adverse effect for most of devices such as storage tanks, distillation columns, transportation tubes and heat exchangers [1,2,3,4,5]
The investigation of the stability and efficacy of stainless steels against the corrosive environment when comparing with other ferrous metals, the contributions of the selected corrosive properties of crude oils on the corrosion rates of different ferrous metals, the qualitative analysis of the usually forming corrosion compounds on the metal surfaces due to the effects of crude oils and the variations of some important surface properties of metals such as the hardness were the prime outlooks of the current research
Summary
Crude oil is a predominantly occurred as a mixture of hydrocarbons since having some trace chemical compounds that gives various behaviors to the relevant crude oils including the corrosive behaviors. Some important investigations about the effect of such corrosive compounds on the on the corrosion rates of different types of metals and their changes. The investigation of the stability and efficacy of stainless steels against the corrosive environment when comparing with other ferrous metals, the contributions of the selected corrosive properties of crude oils on the corrosion rates of different ferrous metals, the qualitative analysis of the usually forming corrosion compounds on the metal surfaces due to the effects of crude oils and the variations of some important surface properties of metals such as the hardness were the prime outlooks of the current research
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
