Author(s)

Lucas Paul^1*, Revocatus L. Machunda²

¹Department of Materials and Energy Science & Engineering, Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania.
²Department of Water and Environmental Science and Engineering, Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania.

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.

Corrosion Inhibitor, Mild Steel, Potentiodynamic Polarization, Sulfuric Acid, Nitric Acid

Paul, L. and Machunda, R. (2016) Investigation of Aloe lateritia Gel as Corrosion Inhibitor for Mild Steel in 2 M HNO₃ and 1 M H₂SO₄ Media. Journal of Minerals and Materials Characterization and Engineering, 4, 33-39. doi: 10.4236/jmmce.2016.41004.