Efektivitas Ekstrak Daun Pepaya (<i>Carica papaya</i> L.) Sebagai Inhibitor pada Baja ST37 dalam Medium Korosif NaCl 3% dengan Variasi Waktu Perendaman

Abstract

This research aims to determine the effectiveness of papaya leaf extract (carica papaya l) as inhibitor on st37 steel in corrosive medium nacl 3 %. To find out the corrosion rate resulted by weight reduction method. To know the phase formed on steel is done XRD analysis. While, to know the micro structure and corrosion products produced on steel after soaked in corrosive medium with inhibitor and without inhibitor papaya leaf extract, SEM and EDS analysis were performed. Based on the results of XRD analysis, SEM and EDS with the addition of inhibitors of the diffraction peaks decreased, and the corroded surface area decreased, and the reduction of FeO content in the sample wass less. From the three analyzes and calculation of corrosion rate obtained that inhibitor papaya leaf extract, effectively inhibiting the corrosion rate on St37 Steel