Gravimetric, Electrochemical and Theoretical Study on Corrosion of AA6061/3wt% SiC/3wt% B4C Hybrid Composite in Acid Medium Using EDTA

Juan David Escobar Robledo; Prakasha Shetty; P. Preethi Kumari; M.C. Gowri Shankar; Sneha Kagatikar

doi:10.24874/ti.1052.02.21.05

Tribology in Industry (Mar 2022)

Gravimetric, Electrochemical and Theoretical Study on Corrosion of AA6061/3wt% SiC/3wt% B4C Hybrid Composite in Acid Medium Using EDTA

Juan David Escobar Robledo,
Prakasha Shetty,
P. Preethi Kumari,
M.C. Gowri Shankar,
Sneha Kagatikar

Affiliations

Juan David Escobar Robledo: ORCiD; Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal-576104, Karnataka, India
Prakasha Shetty: ORCiD; Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal-576104, Karnataka, India
P. Preethi Kumari: ORCiD; Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal-576104, Karnataka, India
M.C. Gowri Shankar: ORCiD; Department of Mechanical and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal-576104, Karnataka, India
Sneha Kagatikar: ORCiD; Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal-576104, Karnataka, India

DOI: https://doi.org/10.24874/ti.1052.02.21.05
Journal volume & issue: Vol. 44, no. 1
pp. 73 – 86

Abstract

Read online

The corrosion behaviour of Al6061/3wt%SiC/3wt%B4C hybrid composite was investigated in the presence of 0.5M HCl medium using gravimetric, electrochemical, and theoretical methods. In the present work, ethylenediaminetetraacetic acid disodium (EDTA) was used as an eco-friendly inhibitor. EDTA showed mixed inhibitor behavior, and its inhibition performance decreased with rising temperature from 303 to 323 K. EDTA evinced maximum inhibition efficiency of 82 % at 1.074 mM. The kinetic and thermodynamic results controlling corrosion were evaluated. The inhibition process occurred through the adsorption of EDTA on the hybrid composite sample, which obeyed Langmuir's adsorption isotherm. The experimental results were validated by theoretical study. The corroded and inhibited specimen's surface analysis performed using scanning electron microscopy (SEM) and atomic force microscopy (AFM) confirmed the adsorption of EDTA on the hybrid composite surface.

Published in Tribology in Industry

ISSN: 0354-8996 (Print); 2217-7965 (Online)
Publisher: University of Kragujevac
Country of publisher: Serbia
LCC subjects: Technology: Mechanical engineering and machinery
Website: http://www.tribology.fink.rs/

About the journal

Abstract

Keywords