engleski

Influence of medium and temperature on corrosion properties and microstructure of copper and brass

This paper presents the results of corrosion investigation of copper and brass in H2O and 3.5 % NaCl solution (pH = 4.74 and T = 60 oC). Electrochemical investigations were performed by open circuit potential measurements and potentiodynamic polarization measurements. After polarization measurements, electrode surfaces were investigated by optical microscope and with SEM/EDS analysis. Investigation results showed that the corrosion rate at 60 °C for both copper and brass were higher in 3.5 % NaCl solutions in comparison to the water. Brass showed a higher corrosion rate in 3.5 % NaCl solution, i.e. the copper as more noble metal showed higher resistance to corrosion.

copper, brass, electrochemical examinations, elevated temperature, corrosion rate

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