Corrosion Inhibition of Mild Steel in Sulphuric Acid Solution Using Red Peanut Skin Extract and Lasianthera Africana P. Beauv. (Nkanka Leaf) Mucilage

Abstract

The inhibition efficiency of red peanut skin extract and lasiantheraafricana P. beauv.mucilage on mild steel deterioration (corrosion) in 2M sulphuric acid was studied by the method of weight loss. The extracts were prepared by immersing the red peanut skin and nkanka leaves in hot water (1000g/l and 100g/0.5l of water respectively). The inhibition efficiencies were studied at various temperatures: 30⁰C, 40⁰C and 50⁰C. Results obtained indicated that mild steel corrosion in sulphuric acid was mitigated significantly by the extracts.  As the inhibitor concentration in the acid increased, the inhibition efficiency also increased while temperature increase resulted to a decline in the inhibition efficiency. The active component in red peanut skin extract is catechin while that of lasiantheraafricana p. beauv. (nkanka leaf) mucilage is pectin.