820548.fig.009a
(a)
820548.fig.009b
(b)
820548.fig.009c
(c)
Figure 9: Scanning electron micrographs of carbon steel samples: (a) polished fresh specimens (b) immersed in 1 M HCl solution for 24 h and (c) immersed in 1 M HCl solution containing 1 mM A9Y5GPA for 24 h.