In this research, the influence of immersion time and inhibitor concentration on the inhibiting potential of imperrata cylindrical (spear grass) as Corrosion Inhibitor of mild steel in sulphuric acid solution was investigated using weight loss technique at room temperature. The research was achieved by using 1M concentration of the sulphuric acid solution and varied inhibitor (spear grass) concentration of 1.0g, 1.5g, 2.0g, 2.5g and 3.0g respectively; readings were obtained every 24 hours (1 day) for a period of 120 hours (5 days). Weight loss, corrosion penetration rate, inhibition efficiency and degree of surface coverage were calculated. The electrode potential between the corroding mild steel and the corrosive environment was measured using zinc electrode as the reference electrode. Results obtained revealed that both the immersion time and inhibitor concentration has marked influence on the potential of imperrata cylindrical (spear grass) as corrosion inhibitor for mild steel sulphuric acid solutions. The results show that both the inhibition efficiency and degree of surface coverage increased with an increase in the concentration of the imperrata cylindrical (spear grass) causing a corresponding decrease in corrosion penetration rate and weight loss with increased imperrata cylindrical (spear grass) concentration. Also, the analysis of the results show that inhibition efficiency and surface coverage decreased with increased immersion time, causing a gradual and significant increase in both the weight loss and corrosion penetration rate with time.
This article is published in peer review journal and open access journal, International journal of research in engineering and innovation (IJREI) which have a high impact factor journal for more details regarding this article, please go through our journal website.
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