Abstract
The corrosion inhibition efficiency of the Schiff base N,N’-(5,5-dimethylcyclohexane-1,3-diylidene)dianiline (DmChDa) on mild steel in 1M HCl and 0.5M H2SO4 was evaluated using gravimetric, electrochemical impedance spectroscopy, potentiodynamic polarization and electrochemical noise measurement. Experimental results established that DmChDa possess relatively high corrosion inhibition capacity. Langmuir and El-Awady adsorption isotherms were obeyed by the Schiff base in 1M HCl and 0.5M H2SO4 respectively. SEM analysis showed that DmChDa was adsorbed on the steel surface during corrosion inhibition. The variation of metal dissolution with temperature was also examined using gravimetric study.
Highlights
Mild steel plays a significant role in our day-to-day life on account of their excellent mechanical property and low price.[1-5]
The rate of corrosion of Mild steel (MS) decreased in the presence of DmChDa
The Schiff base DmChDa is a best inhibitor of corrosion for mild steel in 1M HCl 2
Summary
Mild steel plays a significant role in our day-to-day life on account of their excellent mechanical property and low price.[1-5] They are used extensively as building materials, for storage tanks, reactors, boilers, oil and gas transport pipelines and heat exchange processes. Schiff bases which are formed by the condensation of amino acid and aldehydes/ketones has wide applications in various fields such as pharmaceuticals, catalysis, antimicrobial activity, coordination chemistry, agricultural and material science etc. They are being utilized as a potent corrosion inhibitor for a number of reasons such as the presence of azomethine (-CH=N-) group, oxygen, nitrogen and sulphur atoms, unsaturation sites and aromatic rings.[10-12]. The important aspect of the Schiff base molecule that decides
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