Synergistic effect on corrosion inhibition of copper by sodium dodecylbenzenesulphonate (SDBS) and 2-mercaptobenzoxazole

The inhibition effects of sodium dodecylbenzenesulphonate (SDBS) and 2-mercaptobenzoxazole (2-MBO) on corrosion of copper in sulphuric acid solution have been studied using electrochemical impedance spectroscopy (EIS) and Tafel polarization measurements. For 2-MBO, a monotonous increase in inhibitio...

Full description

Saved in:
Bibliographic Details
Published in:Materials chemistry and physics 2008-06, Vol.109 (2), p.281-286
Main Authors: Tavakoli, H., Shahrabi, T., Hosseini, M.G.
Format: Article
Language:English
Subjects:
2-Mercaptobenzoxazole (2-MBO)
Copper
Inhibitors
Sodium dodecylbenzenesulphonate
Synergistic effect
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The inhibition effects of sodium dodecylbenzenesulphonate (SDBS) and 2-mercaptobenzoxazole (2-MBO) on corrosion of copper in sulphuric acid solution have been studied using electrochemical impedance spectroscopy (EIS) and Tafel polarization measurements. For 2-MBO, a monotonous increase in inhibition efficiency was observed as a function of concentration. For SDBS, however, an optimum in the inhibition efficiency was observed for a certain concentration, which is ascribed to the formation of hemi-micellar aggregates that provoke inhibitor desorption from the metal/solution interface at higher concentrations. Upon mixing 2-MBO and SDBS inhibitors, concentrations range showing synergistic inhibition behaviour were identified, and it is concluded that electrostatic interactions between the adsorbed ions. Different adsorption isotherms were tested for describing the adsorption behaviour of both 2-MBO and SDBS.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2007.11.018