THE EFFECT OF INHIBITOR LEVEL OF RAMBUTAN RIND EXTRACT AND HCL SOLVENT CONCENTRATION ON THE CORROSION RATE OF ST 37 STEEL

Muhammad Salafudin Bukhori, Ranto Ranto, Indah Widiastuti

Abstract

The steel processing industry using the pickling process method uses HCl solvent as a steel cleaner. Besides being a cleaner, HCl solvent is also corrosive and be a factor in the corrosion of the steel from the pickling process. Corrosion can be controlled using corrosion inhibitors made from organic materials. Organic materials contain tannin compounds that can react by forming complex compounds on the steel surface so they can protect the steel from corrosion attacks. In this study, the organic materials used as inhibitors were the rambutan rind extract with a concentration of 0.5%; 1.0%; 1.5%; and 2.0% in a concentration of 0.1 N HCl solvent; 0.5 N; and 1.0 N. The test sample used was St. 37 steel. The purpose of this study was to investigate the effect of inhibitor levels of rambutan rind extract and concentration of HCl solvent on the corrosion rate of St. 37 steel. The method used to calculate the corrosion rate is the weight loss method and the data analysis technique used is Two-Way Anava. The results showed that there was an effect of inhibitor levels of rambutan rind extract and the concentration of HCl solvent on the corrosion rate of St. 37 steel. The corrosion rate has the lowest value in the variation of the inhibitor mixture of 2.0% and 0.1 N HCl with the highest efficiency value of 63.13%.

Keywords

inhibitor rambutan rind extract HCl solvent corrosion rate ST 37 steel

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DOI: https://doi.org/10.20961/jomeve.v3i2.46006

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