Investigation on Corrosion Inhibition of Hura Crepitans for 2101 Duplex Stainless Steel in an Acidic Environment

Résumé

The inhibition eff ect of Hura Crepitans seed extract (HCS) on the corrosion of Duplex Stainless Steel 2101 (DSS2101) in 0.5M H 2 SO 4 solution has been studied for the fi rst time by weight loss test method and potentiodynamic polarization method.The extracts elemental compositions were characterized using at omic absorption spectroscopy (AAS).The phenolic and aromatic functional groups in the extracts were revealed with Gas Chromatography Mass Spectroscopy (GC-MS).From the result, phytochemicals such as saponin, tannins, steroid and fl avonoids were observed.The presence of the organic group accounted for the inhibitive effi ciency recorded in the environment.Potentiodynamic polarization test was also conducted to confi rm the eff ectiveness of inhibition.The polarization studies revealed that generally the inhibitor produced from seed extract of Hura crepitans, improved the corrosion resistance of DSS2101 in 0.5M H 2 SO 4 .The optimum corrosion inhibitor effi ciency was observed at 0.2% inhibitors in 0.5M H 2 SO 4 for 2101DSS.Polarization curves reveal that HCS extract acts as a mixed-type inhibitor in 0.5M H 2 SO 4 .

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