STUDY ON CAPACITY INHIBIT CORROSION STEEL REBAR IN CONCRETE OF PHYLLANTHUS URINARIA EXTRACT IN SIMULATED SEAWATER

Abstract

Nowadays, the search for organic corrosion inhibitor compounds to replace inorganic compounds is attracting much attention from scientists worldwide. Organic compounds from nature are often accessible to collect and cheap, mainly because they play a role in sustainable development and are environmentally friendly. This study evaluates the effectiveness of Phyllanthus Urinaria extract as an organic corrosion inhibitor of steel reinforcement in simulated seawater (3.5% NaCl solution). Electrochemical methods, including polarization curves and electrochemical impedance, studied the corrosion inhibition effect of the extract. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDX) were used to analyze the surface of the rebar samples. Electrochemical measurement results show that Phyllanthus Urinaria extract is an effective corrosion inhibitor for concrete reinforcement caused by seawater. At a concentration of 0.02% of the extract in simulated seawater, Phyllanthus Urinaria can improve the corrosion resistance of steel reinforcement when the corrosion rate is reduced to 0.078 mm/year compared to 0.113 mm/year without extracts. The results are the basis for orienting the application of Phyllanthus Urinaria extract to limit damage to reinforced concrete construction in the marine environment.