Mild steel(20 carbon steel) was surface-treated with cerium salt to generate Ce salt conversion coating.The corrosion resistance of as-obtained Ce salt conversion coating in seawater was evaluated by rotary coupon test and electrochemical test.The morphology and elemental composition of the Ce salt conversion coating were examined with a video microscope and an energy dispersive spectrometer,and the film-formation mechanism of Ce salt conversion coating was discussed.Results indicate that blue and uniform c...