Investigation of The Inhibition Action of Talinum Triangulare on the Corrosion of Mild Carbon Steel in Seawater

Abstract

In many areas of technology and the economy, corrosion inhibitors are becoming more and more crucial for the anticorrosive protection of metals and their alloys. Despite the fact that several synthetic chemicals have good anticorrosive action, the majority of them are extremely harmful to both the environment and humans. The use of certain natural materials as corrosion inhibitors is motivated by the known harmful consequences of the majority of synthetic corrosion inhibitors. Thus, talinum triangulare extract was used as an inhibitor in an inquiry into the corrosion inhibition of mild steel in seawater. The mild steel bars were divided into coupons and suspended in a seawater solution in a container with different inhibitor concentrations (0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, and 7.0% v/v) added and allowed to stay in the sea water for 15, 30, 45, 60, and 7 days. After 15 days, the weight loss of each coupon was measured, and the inhibitor's rate of corrosion and level of protection was computed. As the inhibitor concentration increased, the rate of corrosion decreased until it reached a maximum of 4.0 v/v%. However, when the inhibitor's concentration rose, so did its effectiveness in providing protection (inhibition). The pairs of electrons found in the functional groups—the high concentration of saponin and tannin—were responsible for the inhibitor's adsorption onto the mild carbon steel. By directly suppressing the ongoing removal of atoms from the mild carbon steel foundation, this stabilizes the mild carbon steel and slows down the corrosion degradation process. This study has demonstrated that mild carbon steel can be protected against corrosion by using the plentiful talinum triangulare.