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An electro deposition of Ni film has been carried on steel substrat using 0,5M NiSO4.6H2O solutions with the addition of cacao peels extract inhibitor. This study performed electro depositon variation of time and inhibitor concentration variation of cacao peels extract were performed with the tensile of 3V 2mA. There was morphology difference occurred on steel before and after being electrodeposited. The adding of extract cacao peels inhibitor influenced morphology as well and minimized the occurence of corrosion on steel surface. Referred to characterization result in order to see morphology using optical microscope and SEM, the result was better on 1% inhibitor concentration with 25 minutes electro deposition time. Steel surface was seen more evenly and finer. Seeing it through XRD result, the constructed peaks were thinner by adding cacao peels extract inhibitor. The inhibition efficiency result of corrosion rate measurement using potentiodynamic polarization resulted 16.8% of %IE for 1% concentration, and 66.88% for 1.5% concentration. The more inhibitor concentration increased, the more and the better the compounds acted as corrosion inhibitor. The weight loss method measurement obtained an increase on corrosion rate and inhibition efficiency and more cacao peels extract inhibitor concentration.

The Use of Cacao Peels Extract (Theobrema Cacao) as the Corrosion Inhibitor on Steel Layers Electrodeposition