Galvanostatic optimization of polyaniline coating on mild steel in tartrate medium for corrosion protection

Indian Journal of Chemical Technology

article

Dipak Kumar Gupta¹  Shova Neupane³  Sanjay Singh¹  Amar Prasad Yadav¹ 

[1]Central Department of Chemistry, Tribhuvan University

[2]Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University

[3]Centre national de la recherche scientifique

关键词: Aniline;    Electropolymerization;    Mild Steel;    Polyaniline;    Sodium potassium tartrate;    Article;   

学科分类：化学（综合）

来源: National Institute of Science Communication and Information Resources

【 摘 要 】

Optimization of polyaniline (PANI) coating on mild steel (MS) surface has been studied in 0.3 M aniline + 0.2 M sodium potassium tartrate (Na-K Tartrate) by galvanostatic polarization. The current densities of 0.5, 0.75. 1 and 2 mA cm-2 are used for the electrodeposition of PANI on MS. The obtained PANI coatings have been characterized for its morphology using an optical microscope and corrosion performance by using potentiodynamic polarization in 0.4 M Na2SO3 solution simulating an industrial environment. The results reveal a sequential process of dissolution of MS, passivation of MS by forming tartrate salt followed by oxidation of aniline monomer and subsequential nucleation and growth of PANI coating. It is found that the PANI coating obtained at 0.5 mA cm-2 results in better coating producing corrosion inhibition efficiency (IE) of approximately 90% compared to IE of about 75% for coating obtained at 2 mA cm-2.

【 授权许可】

CC BY-NC-ND