Sodium Citrate as an Environmentally Friendly Corrosion Inhibitor of Steel in a Neutral Environment

Figure 7

The optical image of 09G2S steel surface after 24 hours of exposure to 0.1% NaCl solution: (a) uninhibited, (b) inhibited by sodium citrate at a concentration of 2 g/l, and (c) inhibited by sodium citrate at a concentration of 2.5 g/l.

(a)

(b)

(c)