Experimental and theoretical investigation on corrosion inhibition of AA5052 aluminium alloy by l-cysteine in alkaline solution

Wang, Dapeng, Gao, Lixin, Zhang, Daquan, Yang, Dong, Wang, Hongxia and Lin, Tong 2016, Experimental and theoretical investigation on corrosion inhibition of AA5052 aluminium alloy by l-cysteine in alkaline solution, Materials chemistry and physics, vol. 169, pp. 142-151, doi: 10.1016/j.matchemphys.2015.11.041.

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Title Experimental and theoretical investigation on corrosion inhibition of AA5052 aluminium alloy by l-cysteine in alkaline solution
Author(s) Wang, Dapeng
Gao, Lixin
Zhang, Daquan
Yang, Dong
Wang, Hongxia
Lin, TongORCID iD for Lin, Tong orcid.org/0000-0002-1003-0671
Journal name Materials chemistry and physics
Volume number 169
Start page 142
End page 151
Total pages 10
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-02-01
ISSN 0254-0584
Keyword(s) Science & Technology
Technology
Materials Science, Multidisciplinary
Materials Science
Alloy
Corrosion test
Adsorption
Corrosion
SODIUM-HYDROXIDE SOLUTION
AL-AIR BATTERY
ELECTROCHEMICAL-BEHAVIOR
DIFFERENT GRADES
ANODIC BEHAVIOR
PURE ALUMINUM
ELECTROLYTES
PERFORMANCE
MEDIA
Summary The corrosion inhibition of l-cysteine on AA5052 aluminium alloy in 4 mol/L NaOH solution was investigated by hydrogen gas evolution experiment, polarisation curve, galvanostatic discharge, electrochemical impedance spectroscopy measurements and quantum chemical calculations. The adsorption of l-cysteine on aluminium alloy surface obeyed the amended Langmuir's adsorption isotherm. The polarisation curves indicated that l-cysteine acted as a cathodic inhibitor to inhibit cathodic reaction. The inhibition mechanism was dominated by the geometric covering effect. The galvanostatic discharge shows that the additives restrain the hydrogen evolution and increase the anodic utilization rate. Quantum chemical calculations indicated that l-cysteine molecules mainly interacted with on the carboxyl groups on the aluminium alloy surface. A strong hybridization occurred between the s-orbital and p-orbital of reactive sites in the l-cysteine molecule and the sp-orbital of Aluminium.
Language eng
DOI 10.1016/j.matchemphys.2015.11.041
Field of Research 091207 Metals and Alloy Materials
0912 Materials Engineering
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Elsevier B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30083515

Document type: Journal Article
Collection: Institute for Frontier Materials
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