Abstract

Roland Tolulope Loto and Bryan Uche Ayozie

DOI : http://dx.doi.org/10.13005/ojc/340406

Investigation of the corrosion inhibition properties of benzonitrile compound on the surface degradation of quenched 420 martensitic steel in 6 M H₂SO₄ was evaluated through the application of potentiodynamic polarization method, micro analytical study and ATR-FTIR spectroscopic analysis. Experimental data showed optimal inhibition performance of the compound with peak inhibition efficiency of 99.4% with mixed type inhibition but dominant anodic inhibition properties. The inhibiting compound significantly influenced the thermodynamic behaviour of the steel resulting in chemisorption adsorption mechanism onto steel surface in consonance with Langmuir and Freundlich adsorption models with correlation coefficients of 1 and 0.7570. The transmittance of identified functional groups of benzonitrile from ATR-FTIR spectroscopy decreased at extended wavelengths due to surface coverage and adsorption of the compound onto the steel.

ATR-FTIR; Benzonitrile Wavelengths; Chemisorption Adsorption

[ View HTML Full Text]