Abstract
Abstract 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. Keywords: Steel; Electrodeposition; NiSO4; Cacao peels extract; Inhibitor
Highlights
Steels are utilized in industry world because of its strength, forged and oxidized, good conductivity like iron, copper, steel, zinc, and aluminium
The slope of Tafel, corrosion potential (Ecorr), and corrosion current density (Icorr) can be indicated using extra polarization way. This Tafel Method provides information on the number of produced corrosion current (Icorr) on steel surface interacting with corrosive solution
By using 2 Volt, optimum electro deposition result is obtained through morphology on 25 minutes time and 1% cacao peels extract inhibitor concentration
Summary
Steels are utilized in industry world because of its strength, forged and oxidized, good conductivity like iron, copper, steel, zinc, and aluminium. One of applications in using the steel is through off shore piping, bridge construction, building, framework of a vehicle. It is oxidized as it is directly interacted with its surrounding and causes corrosion. Corrosion is a destructive process as a result of chemical reaction between metal or alloy with its environment [4,5]. Corrosion on metal is a reduction reaction process and chemical oxidation or electrochemical causing electron transfer from steel to environment, so metal oxidation number changed from zero to positively charged [3]
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