Background: In this paper, a comparative study of the correctness of the results of
registration of corrosion kinetics with the methods of current-voltage curves (V / a) and Coulometric
Registration of Corrosion Products (CDCP method) was carried out.
Methods: It is shown that the action of the electric field under polarization changes the character of the
corrosion process and, in particular, stimulates the formation of the oxide layer, leading to a distortion
of the results of the loss of the mass of the metal.
Results and Conclusion: The convergence of the results of coulometric and "tafel" measurements of
mass loss is established only on "pure" metal. After the formation of the oxide layer, the "tafel" results
show a protective effect, which does not exist in a real corrosion process.