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All Journal Aceh International Journal of Science and Technology
A A Adediran
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences

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Inhibitory action of rice husk extract (RHE) on the corrosion of carbon steel in acidic media O Olawale; A A Adediran; T Oyinbo; O Kalawole
Aceh International Journal of Science and Technology Vol 6, No 2 (2017): August 2017
Publisher : Graduate Program of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1103.03 KB) | DOI: 10.13170/aijst.6.2.8456

Abstract

The study investigates the inhibition characteristics of rice husk extract (RHE) on the corrosion of mild steel in 1M acidic media. Mass loss, Fourier Transform Infrared Spectroscopy (FTIR), phytochemical analysis were used as basis for studying the corrosion inhibition behaviour of the extracts. The analyses of the results showed that as concentration increases, there was increase in the inhibitor while increase in temperature reduces the inhibition respectively. Moreover, the highest inhibition efficiency was 94.24 % at 40 oC and 0.25 g/l inhibition concentration in sulfuric acid medium while inhibition efficiency of 89 % at 60 oC and 0.20 g/l inhibition concentration in hydrochloric acid. The thermodynamic parameters revealed that the adsorption of extract onto the metal surface was spontaneous. Langmuir isotherm best fits the data obtained suggesting physical adsorption as the adsorption mechanism between the extract and the mild steel substrate. The results from the FT-IR spectroscopy showed that the organic compounds found in Rice husk made it a good inhibitor.
Co-Authors O Kalawole O Olawale T Oyinbo