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

Figure 6

The surface of 09G2S steel samples after 24 hours of exposure to a 0.1% NaCl solution inhibited by sodium citrate with a concentration of (a) 0.5 g/l, (b) 1.0 g/l, (c) 1.5 g/l, (d) 2.0 g/l, and (e) 2.5 g/l.

(a)

(b)

(c)

(d)

(e)