Abstract
The inhibition effect of 2-aminopyrimidine(2-AP) on the corrosion of cold rolled steel(CRS) in 1.0~5.0 mol/L HCl media at 20~50 ℃ has been studied by mass loss,potentiodynamic polarization curves and electrochemical impedance spectroscopy(EIS) methods.The results showed that the neutral 2-AP is a good inhibitor for CRS,and the adsorption of 2-AP on the CRS surface follows the amended Langmuir adsorption isotherm equation.Inhibition efficiency increases with the inhibitor concentration,while decreases with temperature and the concentration of HCl.Polarization curves showed that 2-AP is a mixed-type inhibitor.EIS spectra exhibited one capacitive loop,and the charge transfer resistance increased with the inhibitor 2-AP concentration.
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