Relative Comparison of Adsorption and Corrosion Inhibition Studies of Expired Vitamin B12 and C Over Mild Steel in 0.5 M H2SO4

Abstract

In comparison to organic corrosion inhibitors, green corrosion inhibitors are in great need for mitigating corrosion of metals and alloys ascribed to their benign toxicity in addition to absence of heavy metals and toxic substances. Contemporary research conducted in this field is more focused on implementing an efficient approach towards corrosion mitigation. The present work highlights the evaluation of anti-corrosive potential of expired Vitamin B and Vitamin C over mild steel in 0.5M H2SO4. Gravimetric and electrochemical studies have been utilized as affirmatory tool for corrosion retarding ability of the synthesized derivative. Concentration increase brought a profound rise in corrosion inhibition efficiency whereas variation in temperature from 308 K-328 K retarded the protection ability of respective inhibitors whereas electrochemical studies presented depressed semi-circles in Nyquist plots and potentiodynamic values demarcated both inhibitors as mixed type. Furthermore, a comparison among the two tested vitamins has been drawn. Contact angle measurements have been involved here to confirm the inhibitors adsorption over mild steel surface. The present experimental work will provide future insights for researchers working in field of corrosion.