Inhibitive Effect ofArgemone mexicanaPlant Extract on Acid Corrosion of Mild Steel

Abstract

The effect of plant extract of Papaveraceae family Argemone mexicana is studied for use as a low cost and efficient corrosion inhibitor for mild steel in acidic environment. This plant extract is selected for the study of corrosion inhibition in view of its rich source of organic inhibiting molecules as proteins, amino acids, tannins, phenolic compounds, saponins, and flavonoids and nonalkaloids organic compounds such as fused benzene rings, hetero N atom rings, −OCH3, and −OH groups. A simple extraction method is adopted to obtain water-based plant extract. Argemone mexicana extract is for the first time used as an efficient inhibitor for mild steel in 1 M HCl. Weight loss and electrochemical methods are used to study the corrosion. Nearly 80% corrosion inhibition is observed at around 200 mg L–1 inhibitor concentration and maximum (92.5%) for 500 mg L–1 extract concentration in 1 M HCl. Inhibition mechanism is studied using UV–vis, electrochemical, and surface imaging techniques.

Plant Extracts as Green Corrosion Inhibitors in Various Corrosive Media- A Review

“…Inhibition mechanism had been studied using UV_vis, electrochemical and surface imaging techniques. [20] …”

Dry and wet lab analysis on benzofused heterocyclic compounds as effective corrosion inhibitors for mild steel in acidic medium

“…5 implies a phase angle shift in the inhibited system when compared to the inhibitor free system, and a continuous increase is seen with the inhibitor concentration in the region of between log (Freq) 2-4 Hz which represents the capacitive behavior of the adsorptive film in sulphuric acid medium. This results from the reduction in the metal dissolution and in the capacitive behavior on the electrode surface [49,50].…”

Green Methods for Corrosion Control

“…Large numbers of organic extracts of plant materials have been used to prevent a variety of metals such as mild steel [17][18][19][20][21][22][23][24][25][26][27][28], various types of steel [29,30], cast iron [31] aluminum and its alloys [32][33][34], zinc and its alloys [35][36][37][38], copper [39][40][41], nickel [42,43] and tin [44,45].…”