High Temperature Effectiveness of Ginger Extract as Green Inhibitor for Corrosion in Mild Steel

Muhammad Sohail, Fayaz Hussain, Ali Dad Chandio, Maryam Sheikh

Abstract


Corrosion is one of the major problems of mild steels in acidic medium. This can be minimized by the application of corrosion inhibitors, however; the most of inhibitors are toxic in nature. Therefore inhibitors from green sources are highly desirable to maintain the sustainability of the environmental system. Consequently, in this study ginger was selected; its juice extracted mechanically and used as an inhibitor. The different concentrations of ginger extract such as 0.25ml, 0.5ml, 0.75ml and 1ml were mixed in 0.1 M HCl solution to record the effect of inhibitor on corrosion rate at room temperature and at an elevated temperature of 50ᵒC. Electrochemical linear polarization resistance (LPR) tests were carried out to determine the corrosion rates at both temperatures with different additions of the inhibitor respectively. The LPR test uses three electrodes, first electrode of AISI 1019 (mild steel), second electrode is standard electrode of saturated calomel while the third electrode consists of graphite, which is called counter electrode, to measure potential difference. The whole assembly was dipped in the solution having varying concentration of inhibitors. The corrosion rate was found to be higher in the absence of ginger- extract. Conversely, the corrosion rate was dramatically reduced more prominently at 50oC but was less effective at Troom; with the trace-additions of ginger-inhibitor. So this research would be the good contribution to overcome the deterioration of mild steel and increase its life at ambient temperatures, by using economically available environmentally-friendly organic compound specially the use of locally available raw material should be focused.


Keywords


Mild Steel; Green Corrosion Inhibitor; Ginger extract; linear polarization

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References


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DOI: http://dx.doi.org/10.24949%2Fnjes.v11i1.266

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ISSN (Print): 2070-9900   ISSN (Online): 2411-6319