Study of Mild Steel Corrosion in Sulphuric acid medium by Moringa oleifera leaf extract by Electrochemical and Surface Analysis Studies

Abstract

The inhibitive effect of Moringa oleifera leaf extract on mild steel corrosion in 1N H 2 SO 4 solution was studied using electro chemical techniques and gravimetric method. The weight loss results showed that the plant extract was an excellent corrosion inhibitor. The inhibition efficiency increased with increase in concentration of the plant extract. The highest inhibition efficiency of 96% was observed with 8ml of plant extract in acidic medium. Immersion period was carried out to optimize the period of immersion. The surface studies such as FT-IR, scanning electron microscopy (SEM), EDAX were carried out to confirm the protective layer formed on the metal surface. The inhibition effect is due to the adsorption of active molecules leading to the formation of a protective layer on the surface of mild steel.

EVALUATION OF TETRA-n-BUTYLAMMONIUM BROMIDE AS CORROSION INHIBITOR FOR MILD STEEL IN 1N HCl MEDIUM: EXPERIMENTAL AND THEORETICAL INVESTIGATIONS

“…Weight loss experiments have been carried out by immersing triplicate specimens in 1NHCl containing numerous TBAB concentrations at diverse temperatures ranging from 298 K to 328 K for about 1 h. After 1h, immersed metal samples were washed, dried, and re-weighed. The corrosion rate (CR) and inhibition efficiency (IE %) were calculated by the following expressions: 19 (%) = × 100…”