Research Article

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 4

Evolution of hydrogen gas released (a) and the corresponding inhibition efficiencies (b) over time for AISI 321 in 5.5 M polluted phosphoric acid in the absence and in the presence of different concentrations of AMH at 20°C.
(a)
(b)