Coconut fiber extraction using soda pulping method as green corrosion inhibitor for ASTM A36 Steel

Abstract

Currently, the corrosion inhibitor is a method that is widely used to control the corrosion rate of inner pipe in the chemical industry. This study aims to utilize coconut fiber as a green inhibitor, determine the effect of adding inhibitor concentration, immersing time, and determine the inhibition efficiency of coconut husk extract. The extraction method used is the soda pulping method with a solid to liquid ratio of 1:8 (w/v). The method used for testing the corrosion rate is the weight-loss method, UV-Vis Spectrophotometry and FT-IR are also used to analyze the lignin produced. The lowest corrosion rate was obtained in 1 M HCl corrosive medium with the addition of 3 g/L inhibitors at 48 hours immersion, which was 49.691 mpy. The highest inhibition efficiency was in 1 M HCl corrosive media solution with the addition of 3 g/L inhibitors at 48 hours immersion, which was 78.11%.