Study on Corrosion Resistance of Carbon Steel in HF/HCl Acid Mixture in Presence of Lycoris radiata and Lycoris chinensis Leaf Extract as Environmentally Friendly Corrosion Inhibitor

Abstract

The nitrogen and oxygen elements in natural plant protein can supply electrons. The concrete hole solution in the protein hydrolysis produced by the amino and carboxyl groups is good for electron groups, which slows down the corrosion. In this work, Lycoris radiata and Lycoris chinensis leaves were extracted, and environmentally-friendly corrosion inhibitors were prepared. The performance of corrosion inhibitors were evaluated with weight loss method and electrochemical method. This work aimed to investigate the anti-corrosion properties of single plant extracts, and prepare a composite corrosion inhibitor. The experimental results reveal that the strongest synergistic effect can be presented when Lycoris radiata and Lycoris chinensis are paired in a 2:3 ratio.