Yusif Sani Abubakar*
The starch was characterized using FTIR. The corrosion inhibition effectiveness was investigated using weight loss method. The results obtained show that cassava starch is a good inhibitor and the inhibitory efficiency of 88% is higher than that of millet starch starch 60.3%. the adsorption of both millet and cassava starch on steel surface obeys Temkin adsorption isotherm. This study revealed that both millet and cassava starch can be used as corrosion inhibition in acidic medium. However, the inhibition performance of millet starch is lower than that of cassa va starch. It is suggested that this difference in inhibition efficiency may be due to a difference in proportion of short amylopectin chain and amylose content. The isolated starch of cassava showed negligible iodine affinity indicating that the amylose c o ntent of starch was very low (<1.0%). Cassava starch can be a good for studying the influence of amylopectin fine structure on adsorption characteristic of starch
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