TITLE:
Investigation of Aloe lateritia Gel as Corrosion Inhibitor for Mild Steel in 2 M HNO3 and 1 M H2SO4 Media
AUTHORS:
Lucas Paul, Revocatus L. Machunda
KEYWORDS:
Corrosion Inhibitor, Mild Steel, Potentiodynamic Polarization, Sulfuric Acid, Nitric Acid
JOURNAL NAME:
Journal of Minerals and Materials Characterization and Engineering,
Vol.4 No.1,
January
18,
2016
ABSTRACT: Corrsion inhibition of Aloe lateritia gel for Mild steel in 2 M HNO3 and 1 M H2SO4 solutions was investigated
by potentiodynamic polarization, Scanning electron microscopy (SEM) and Foutier
transform infrared (FT-IR). Inhibition efficiency increased with the increase of the concentration
of the gel. The optimal concentration of the gel gives maximum inhibition efficiency of 77.4% and
70.3% in 1 M H2SO4 and 2 M HNO3 respectively. Polarization plots shows that, the gel works as a
mixed type inhibitor altering both cathodic and anodic reaction. SEM proves the uniform and pitting
corrosion at the surface of Mild steel in 1 M H2SO4 and 2 M HNO3 respectively. Using FT-IR potential
function groups from pure gel and some stretch shift was observed from corrosion product
and some stretch shift from corrosion products was observed.