Comparative Corrosion Behavior of Pure Copper and Brass in 3.5% NaCl Solution
Abstract
Copper and brass are used in many economic sectors as electrical, construction, transport and others. From common household electrical wiring to boat propellers and from photovoltaic cells to saxophones, copper and its alloys are employed in a variety of end-uses. Copper tubing is now the standard material for potable water and heating systems in most developed countries. This is in part due to its bacteriostatic properties, or in other words due to the ability of copper to inhibit the growth of bacterial and viral organisms in water. Therefore, the corrosion resistance of copper and brass are important in defining the field of use as construction parts. This paper aims at investigating the comparative corrosion behavior of pure copper and brass in 3.5 % NaCl solution. The corrosion behavior of both type samples in 3.5% NaCl solution was investigated by the use of electrochemical methods as open circuit potential and linear polarization resistance measurements. The results show an improved corrosion resistance of pure copper sample in 3.5 wt. % NaCl solution as compared with brass sample.
References
[2]. Burstein G. T., Bia H., Kawaley G., The Persistence of Inhibition of Copper Corrosion in Tap Water, Electrochimica Acta, 191, p. 247-255, 2016.
[3]. Yohai L., Vázquez M., Valcarce M. B., Brass corrosion in tap water distribution systems inhibited by phosphate ions, Corrosion Science, 53, p. 1130-1136, 2011.
[4]. Santana Jiménez Y., Tejera Gil M., Torrado Guerra M., Baltes L. S., Mirza Rosca J. C., Interpretation of open circuit potential of two titanium alloys for a long-time immersion in physiological fluid, Bulletin of the Transilvania University of Brasov, vol. 2, (51), p. 197-204, 2009.
[5]. Choudhary S., Garg A., Mondal K., Relation between open circuit potential and polarization resistance with rust and corrosion monitoring of mild steel, Journal of Materials Engineering and Performance vol. 25(7), p. 2969-2976, 2016.
[6]. Blanco M., Barragan J. T. C., Barelli N., Noce R. D., Fugivara C. S., Fernández J., Benedetti A. V., On the electrochemical behavior of Cu–16%Zn–6.5%Al alloy containing the β-phase (martensite) in borate buffer, Electrochimica Acta, 107, p. 238-247, 2013.
[7]. Tadeja Kosec, Ingrid Milošev, Boris Pihlar, Benzotriazole as an inhibitor of brass corrosion in chloride solution, Applied Surface Science, 253, p. 8863-8873, 2007.
[8]. Valcarce M. B., de Sánchez S. R., Vázquez M., Localized attack of copper and brass in tap water: the effect of Pseudomonas, Corrosion Science, 47, p. 795-809, 2005.
