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Investigation of Aloe lateritia Gel as Corrosion Inhibitor for Mild Steel in 2 M HNO3 and 1 M H2SO4 Media


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

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.

Keywords

Corrosion Inhibitor, Mild Steel, Potentiodynamic Polarization, Sulfuric Acid, Nitric Acid.
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  • Investigation of Aloe lateritia Gel as Corrosion Inhibitor for Mild Steel in 2 M HNO3 and 1 M H2SO4 Media

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Authors

Lucas Paul
Department of Materials and Energy Science & Engineering, Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania, United Republic of
Revocatus L. Machunda
Department of Water and Environmental Science and Engineering, Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania, United Republic of

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.

Keywords


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