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Evaluation of Proposed Natural Corrosion Inhibitors for X-52 Carbon Steel in Ethanol Media

Oliveira, Rafael Figueiredo de
http://orcid.org/0000-0002-3979-5379
http://rave.ohiolink.edu/etdc/view?acc_num=akron1448385629

Abstract Details

2015, Master of Science in Engineering, University of Akron, Chemical Engineering.
This work describes the testing performed for corrosion control actions for X-52 carbon steel in ethanol media by using inhibitors, the following compounds were included: linalyl formate, linalyl acetate, linalyl butyrate, citronellyl acetate and 1-pentylallyl acetate. The experiments were performed in an electrochemical 3 electrode system with an X-52 steel rotating cylinder electrode (RCE) with rotational speed adjusted to 130 RPM. The system was deaerated by bubbling nitrogen gas into the ethanol solution. The Electrochemical Impedance Spectroscopy (EIS) technique was used to characterize the metal/electrolyte interface. Experimental testing was performed in anhydrous ethanol solution with 5 mM or 10 mM of one inhibitor. Surface analyses for the corroded surfaces were obtained by scanning electron microscopy (SEM) and White light interferometry (WLI). The results suggest that linalyl formate promotes the highest corrosion inhibition efficiency at 10 mM, followed by citronellyl acetate and linalyl butyrate. At this concentration, 1-pentylallyl acetate and linalyl acetate have not promoted corrosion inhibition. At a concentration of 5 mM, linalyl formate, linalyl acetate and linalyl butyrate promoted high inhibition efficiencies during the first hours but none was able to promote a longer protection than one day, possibly due to chemical degradation, chemical reactions and/or reduced surface coverage. The linalyl formate is considered the best chemical for inhibition purposes, especially at the concentration of 10 mM.
Homero Castaneda-Lopez, Dr. (Advisor)
Hongbo Cong, Dr. (Committee Member)
Qixin Zhou, Dr. (Committee Member)
124 p.
Chemical Engineering; Materials Science
corrosion inhibitors; X52 steel; ethanol; linalyl formate; linalyl acetate; linalyl butyrate; citronellyl acetate; 1-pentylallyl acetate; electrochemical impedance spectroscopy; EIS; scanning electron microscopy; SEM; white light interferometry; WLI

Recommended Citations

Citations

  • Oliveira, R. F. D. (2015). Evaluation of Proposed Natural Corrosion Inhibitors for X-52 Carbon Steel in Ethanol Media [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1448385629

    APA Style (7th edition)

  • Oliveira, Rafael. Evaluation of Proposed Natural Corrosion Inhibitors for X-52 Carbon Steel in Ethanol Media. 2015. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1448385629.

    MLA Style (8th edition)

  • Oliveira, Rafael. "Evaluation of Proposed Natural Corrosion Inhibitors for X-52 Carbon Steel in Ethanol Media." Master's thesis, University of Akron, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1448385629

    Chicago Manual of Style (17th edition)

akron1448385629
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This open access ETD is published by University of Akron and OhioLINK.