Fig. 9: Different Mo–Sn steels in simulated tropical marine atmospheric solution after 576 h of dry/wet cycle corrosion experiment.
From: Effect of Mo and Sn co-regulation on low alloy steel corrosion in tropical marine atmosphere

a Nyquist plots, and the 10 mHz point corresponding to the curve is marked. b Equivalent circuit (Rs is the solution resistance, Qf and Rf are the constant phase element and resistance of the corrosion product film, respectively. Qdl and Rct are the constant phase elements of the surface double layer and the charge transfer resistance of the steel, respectively). c Fitting results of Rs, Rf, Rct and Rtotal.