Jeyaraj, T. and Raja, C. and Paramasivam, M. and Jayapriya, B. (2005) Inhibition of Corrosion of Mild Steel in 10 % Sulfamic Acid by Azo Dyes. Transactions of the SAEST, 40 (1). pp. 19-23.

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The inhibitive influence of 3-Nitro-4′-N,N-dimethylaminoazobenzene and 4-Nitro-4′-N,N-dimethylaminoazobenzene was studied on the corrosion of mild steel in 10 % sulfamic acid. The values of percentage inhibition efficiency by the methods, showed close agreement. The difference in inhibitive action was explained on the basis of their molecular structure. The p-isomer was found to give the higher inhibition efficiency than m-isomer. The steady OCP value for mild steel, dipped in 10 % sulfamic acid, was not considerably shifted by the increasing addition of the inhibitor. However, the corrosion of mild steel dipped in 10 % sulfuric acid was predominantly under anodic control, in the presence and in the absence of the dye. Both the anodic and the catholic processes are polarized considerably with the increasing concentration of the inhibitor. Therefore the inhibition is of mixed type.

Item Type: Article
Uncontrolled Keywords: Azo dyes
Subjects: Corrosion Science and Engineering
Depositing User: TTBD CECRI
Date Deposited: 17 Jan 2012 10:53
Last Modified: 17 Jan 2012 10:53

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