Molebdate as Corrosion Inhibitor for Aluminium 356 in Acidic and Saline Media

Authors

  • A A Jahagirdhar Department of Chemistry, Dr. Ambedkar Institute of Technology, Bengaluru, Karnataka 560056
  • R D Pruthviraj Department of Chemistry, RajaRajeswari College of Engineering, Bengaluru, Karnataka 560074, India

DOI:

https://doi.org/10.48165/

Keywords:

Aluminium 356, Corrosion, Molebdate, HCl, NaCl, Potentiodynamic

Abstract

Corrosion processes are responsible for huge losses in industry. Though organic, inorganic and mixed  material inhibitors were used for a long time to combat corrosion, the environmental toxicity of organic  corrosion inhibitors has prompted the search for inorganic corrosion inhibitors. The effect of Molebdate  as novel corrosion inhibitors on the corrosion of aluminium 356in acidic and saline media was  investigated by electrochemical and weight loss techniques. The effect of inhibitor concentration was also  investigated. High resolution scanning electron microscopy equipped with energy dispersive  spectroscopy (HR-SEM/EDS) was used to characterize the surface morphology of the metal before and  after corrosion. Experimental results revealed that Moleblate in the studied solution decreased the  corrosion rate at the different concentrations studied. The experimental results obtained from  potentiodynamic polarization method showed that the presence of the Moleblate in 3.5% NaCl and 0.5 M  H2SO4 solutions decreases the corrosion current densities (icorr) and corrosion rates (CR), and increases  the polarization resistance (Rp). It was observed that the inhibitor efficiency depends on the corrosive  media, concentration of the inhibitor and the substrate material. The adsorption characteristics of the  Moleblate were also described. Good correlation exists between the results obtained from both methods. 

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Published

2022-12-15

Issue

Vol. 41 No. 2 (2022): Bulletin of Pure and Applied Sciences-Chemistry (Jul-Dec) 2022

Section

Articles

How to Cite

Molebdate as Corrosion Inhibitor for Aluminium 356 in Acidic and Saline Media . (2022). Bulletin of Pure and Applied Sciences-Chemistry , 41(2), 89–98. https://doi.org/10.48165/