Journal
CORROSION SCIENCE
Volume 83, Issue -, Pages 124-136Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2014.02.004
Keywords
Alloy; Polarization; EIS; Acid inhibition
Funding
- Natural Science Foundation of Hunan Province, China [11JJ4040, 13JJ3107]
- Scientific Research Fund of Hunan University of Technology [2011HZX05]
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The inhibition behavior of imidazole (IM) and 2-phenyl-2-imidazoline (2-PI) for AA5052 was investigated by weight loss, electrochemical, contact angle measurements and scanning electron microscopy. The results show that IM and 2-PI can inhibit the corrosion of AA5052 and the inhibition efficiency of 2-PI is higher. The adsorption properties of them are estimated using Delta G(ads)(0), Delta H-ads(0) and E-a. The results reveal that the adsorption processes are exothermic reactions mainly by a monolayer chemisorption mechanism, and follow Langmuir adsorption isotherm. The differences of the monolayer adsorption structure between IM and 2-PI on AA5052 surface are analyzed, and the inhibition mechanisms are proposed. (c) 2014 Elsevier Ltd. All rights reserved.
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