(a) For specimens at 6 days (steel left, cast iron right)
(b) For specimens at 30 days (steel left, cast iron right)
(c) For specimens at 90 days (steel left, cast iron right)
(d) For specimens at 180 days (steel left, cast iron right)
(e) For specimens at 270 days (steel left, cast iron right)
(f) Details of a very corroded specimen covered with rusts
Figure 7: Photos of corroded specimens at different exposure periods.