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J Mater Sci Technol  1999, Vol. 15 Issue (06): 559-562    DOI:
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Corrosion Inhibition of Carbon Steel in Hot Hydrochloric Acid Solutions
T.Y.Soror, H.A.El Dahan, N.G.El Sayed Ammer
Chemistry Department, Faculty of Science, Cairo University, Cairo, Egypt...
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Abstract  The dissolution of carbon steel in 5% HCl in the temperature range of 30-90℃ was inhibited by two organic compounds having the general formula: ClR NH2(CH2)n NH2 RCl where R is a benzyl group. The behavior of these inhibitors in acidic medium was investigated using weight loss method, open circuit potential and linear polarization technique. These inhibitors provided satisfactory corrosion inhibition for carbon steel in hydrochloric acid solutions even at higher temperature and acid concentration (10%). The electrochemical results showed that the polarization resistance (Rp) values increased with increasing inhibitor concentration, also the corrosion current decreased and a higher inhibition efficiency was obtained. The protective properties of these two organic inhibitors were attributed to the chemisorption mechanism.
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Received:  15 March 1999     
Corresponding Authors:  T.Y.Soror     E-mail:

Cite this article: 

T.Y.Soror, H.A.El Dahan, N.G.El Sayed Ammer. Corrosion Inhibition of Carbon Steel in Hot Hydrochloric Acid Solutions. J Mater Sci Technol, 1999, 15(06): 559-562.

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