Synergistic Inhibition of Thiourea and I-for Carbon Steel Corrosion in Sulfuric Acid Solution
Synergistic inhibition of thiourea and I-for carbon steel corrosion in sulfuric acid solution was investigated by weight loss,open cir cuit potential(OCP),electrochemical impedance spectroscopy (EIS) and polarization curves,respectively.Scanning electron microscope (SEM) was used to observe the corrosion morphology of carbon steel before and after the corrosion.Results indicated that the mixture of thiourea and I-showed good synergistic inhibition for carbon steel in sulfuric acid solution.When the concentration of thiourea was 0.01 mol/L in sulfuric acid solution,its inhibition efficiency increased from 88.7％ to 96.1％ after adding 0.01 mol/L Ⅰ-.
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