Abstract
The synergistic effect of N-hexadecylpyridinium bromide (PyC16Br) and different sodium halides on the corrosion of mild steel in 0.5 M H2SO4 solution has been investigated using electrochemical methods, X-ray diffraction (XRD) and scanning electron microscope (SEM). Experimental results showed that the protection efficiency (P-icor) of PYC16Br improved at either considerable high concentration near its critical micelle concentration (CMC) or in the presence of the different halides with different extents. The synergism parameter (S-theta) is found to be greater than unity indicating high P-icor. Corrosion products phases and surface morphology were studied using XRD and SEM, respectively. (C) 2013. Elsevier Ltd. All rights reserved.