NDLI: Inhibition of Copper Corrosion by Tolyltriazole in Cooling Systems Using Treated Municipal Wastewater as Makeup Water

Content Provider	Springer Nature Link
Author	Choudhury, Mahbuboor R. Vidic, Radisav D. Dzombak, David A.
Copyright Year	2014
Abstract	Tolyltriazole (TTA) has been identified as an effective copper corrosion inhibitor in cooling systems using treated municipal effluent as makeup water. Significant removal of TTA from solution has been reported in previous studies in the presence of free chlorine and copper metal. Hence, for effective dosing of TTA in the cooling systems, it is important to understand the depletion scenario of TTA in solution in the presence of free chlorine and copper metal. In this study, TTA depletion in solution was assessed using batch reactor experiments in the presence of varying concentrations of free chlorine and copper metal in synthetic cooling water simulating treated municipal wastewater. Increasing free chlorine concentration resulted in more depletion of TTA from solution in the presence of copper metal, which may be due to more adsorption of TTA on to the cuprous oxide surface formed with enhanced corrosion of copper metal and to the formation of insoluble copper–TTA complex with the released copper ions in solution. The enhancement of copper metal corrosion in the presence of TTA and increasing concentration of free chlorine were assessed using electrochemical potentiodynamic polarization experiments. Also, TTA adsorption on cuprous oxide surface was assessed in batch reactor experiments. Packing density of TTA on cuprous oxide surface was found to be pH dependent. More TTA was adsorbed onto cuprous oxide surface at higher pH values. Calculations of TTA free energy of adsorption showed that TTA was chemisorbed onto cuprous oxide.
Starting Page	7741
Ending Page	7749
Page Count	9
File Format	PDF
ISSN	13198025
Journal	Arabian Journal for Science and Engineering
Volume Number	39
Issue Number	11
e-ISSN	21914281
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-10-07
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Copper Corrosion Tolyltriazole Polarization Chlorine Adsorption Engineering Science
Content Type	Text
Resource Type	Article

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