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Comparative Testing of Corrosive Kinetics of Steel by Voltamperometry and Coulometry Methods

[ Vol. 8 , Issue. 2 ]

Author(s):

A.E. Kuzmak* and A.V. Kozheurov   Pages 113 - 117 ( 5 )

Abstract:


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.

Keywords:

Registration, kinetics, corrosion, methods, coulometry, voltammetry, comparison of results.

Affiliation:

AN Frumkin Institute of Physical Chemistry and Electrochemistry, Moscow, 119071, AN Frumkin Institute of Physical Chemistry and Electrochemistry, Moscow, 119071

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