Investigation of Corrosion Protection of Austenitic Stainless Steel in 5.5 M Polluted Phosphoric Acid Using 5-Azidomethyl-7-morpholinomethyl-8-hydroxyquinoline as an Ecofriendly Inhibitor

Figure 8

Bode plots (a) and Nyquist diagrams (b) for AISI 321 after 1 h of immersion at OCP potential in 5.5 M polluted phosphoric acid in the absence and in the presence of various concentrations of AMH at 20°C.

(a)

(b)