Investigation of FTIR and SEM Elemental Characteristics of Mild Steel in Ocimum Gratissimum and Azadirachta Indica Extracts as Corrosion Inhibitors in Seawater

This investigation is to discover the various elements contained in Mild Steel, MS coupons via the green plants inhibitors and corrosive medium concentrations from the Fourier Infrared Spectroscopy and Scanning Electron Microscopy analysis that contributed to the corrosion inhibition on Mild Steel. Corrosion inhibitory effect and behaviour of Ocimum Gratissimum (Scent Leaf, SL) and Azadirachta Indica (Neem Leaf, NL) green plants extracts on Mild Steel C-1026 pipeline in Seawater were evaluated using weight loss methods. The inhibitory property was enhanced with addition of some pineapple juice in the concentration. Corrosion Rate, Inhibition Efficiency, phytochemical analysis, Surface Roughness, Scanning Electron Microscopy, and Fourier Transform Infrared Spectroscopy were also carried out in the study. From the investigation, it was revealed that there was good inhibition efficiency on the Mild Steel pipeline owed to the adsorption the secondary metabolic constituent of the green plant extracts on the MS surface. Neem Leaf has maximum inhibition efficiency of 96.86%, while Scent Leaf had 96.51%. Further still, it was discovered that Corrosion rate was reduced when the green plant inhibitors were added. In addition, the organic compounds exerted much positive impact on the surface roughness on the Mild Steel surfaces. Consequently, it shows that the chemical bioactive constituents as well as the functional groups in the green plant extracts possess some inhibitive properties which were adsorbed on the oil and gas pipeline surfaces.