In search of functionality for efficient inhibition of mild steel corrosion both in HCl and H2SO4

Ali, S. A., Hamdan, A. J., Al-Taq, A. A., Zaidi, S. M. J. and Saeed, M. T. (2011) In search of functionality for efficient inhibition of mild steel corrosion both in HCl and H2SO4. Corrosion Engineering Science and Technology, 46 7: 796-806. doi:10.1179/1743278211Y.0000000011


Author Ali, S. A.
Hamdan, A. J.
Al-Taq, A. A.
Zaidi, S. M. J.
Saeed, M. T.
Title In search of functionality for efficient inhibition of mild steel corrosion both in HCl and H2SO4
Formatted title
In search of functionality for efficient inhibition of mild steel corrosion both in HCl and H2SO4
Journal name Corrosion Engineering Science and Technology   Check publisher's open access policy
ISSN 1478-422X
1743-2782
Publication date 2011-11
Year available 2011
Sub-type Article (original research)
DOI 10.1179/1743278211Y.0000000011
Open Access Status
Volume 46
Issue 7
Start page 796
End page 806
Total pages 11
Place of publication Leeds, United Kingdom
Publisher Maney Publishing
Language eng
Formatted abstract
While the organic ammonium compounds are known to be effective against mild steel corrosion in HCl, these cationic salts are not as effective in sulphuric acid media. A new series of tertiary diallylamines containing C12, C14, C16 and C18 alkyl hydrophobes, N-hexadecylpyrrolidine and their corresponding ammonium salts were found to be among a rare class of inhibitors in arresting mild steel corrosion in HCl as well as in H2SO4 media effectively. While all the inhibitor molecules exhibited excellent inhibition efficiencies (%IEs) (∼99%) in 1M HCl, ammonium salts containing alkyne moiety at 400 ppm provided 93–97%IE even in 7·7M HCl. The inhibitors (400 ppm) containing diallyl moiety demonstrated the %IEs in the range 80–97% in 0·5M H2SO4. The interactions of the π electrons in the diallyl moiety with the low lying vacant d-orbitals of iron help the inhibitor molecules to undergo adsorption and interfere with the anodic dissolution process.
Keyword Mild steel
Polarisation
Potentiostatic
Weight loss
Acid corrosion
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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