CORROSIVE EFFECT BY ALLYLTHIOUREA OF BULK NANOCRYSTALLINE INGOT IRON IN AMBIENT DILUTED ACIDIC SULPHATE SOLUTION

In the corrosive solution 0.1 mol/L H_2SO_4+0.25 mol/L Na_2SO_4,the effect of allyl-thiourea(ATU) on the corrosion behaviors of bulk nanocrystalline ingot iron(BNII) was studied.Inhibited by ATU at ambient temperature,for CPU,when immersion time as short as 5 min,an inductive loop appeared at different concentrations at the Nyquist complex planes;for BNII,only a simple capacitance loop appeared in the Nyquist plot at the same period.With the elongation of the immersion time,for BNII,two time constants appeared in the Nyquist plot;For CPII,the impedance spectrum shows a slightly depressed semicircular shape.