Inhibition of mild steel corrosion in 1M hydrochloric acid by 4-(N,N-dimethylaminobenzilidine)-3-mercapto-6-methyl-1,2,4-triazin(4H)-5-one (DAMMT)

The corrosion behaviour of mild steel in 1M HCl was studied using 4-(N,N-dimethylaminobenzilidine)-3-mercapto-6-methyl-1,2,4-triazin ( 4H)-5-one (DAMMT) as inhibitor using the conventional weight loss method, potentiodynamic polarisation studies(Tafel), linear polarisation studies (LPR), electrochem...

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Bibliographic Details
Published in:Materials chemistry and physics 2010-08, Vol.122 (2-3), p.374-379
Main Authors: John, Sam, Joseph, Bincy, Aravindakshan, K.K., Joseph, Abraham
Format: Article
Language:English
Subjects:
Carbon steels
Corrosion
Corrosion inhibitors
Corrosion rate
Electrochemical impedance spectroscopy
Inhibition
Mathematical analysis
Quantum chemistry
Surface chemistry
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Summary:The corrosion behaviour of mild steel in 1M HCl was studied using 4-(N,N-dimethylaminobenzilidine)-3-mercapto-6-methyl-1,2,4-triazin ( 4H)-5-one (DAMMT) as inhibitor using the conventional weight loss method, potentiodynamic polarisation studies(Tafel), linear polarisation studies (LPR), electrochemical impedance spectroscopy studies (EIS) adsorption studies and quantum chemical calculations. The effect of inhibitor concentrations, inhibition time, corrosion rate and surface coverage are investigated. The corrosion rate and other parameters evaluated for different inhibitor concentrations and the probable mechanism is proposed. The results showed that DAMMT posses excellent inhibition effect towards MS and the compound act as a mixed type inhibitor. The inhibitor molecules were first adsorbed on the MS surface and blocking the reaction sites available for acid attack.
ISSN:0254-0584
DOI:10.1016/j.matchemphys.2010.03.008