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Influence of the Surface Microgeometry upon the Corrosion Effect. I. Electrochemical corrosion
Author(s) -
Parlapanski M.
Publication year - 1972
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19720230709
Subject(s) - corrosion , cathodic protection , materials science , polarizability , electrochemistry , metal , anode , surface roughness , metallurgy , surface finish , ohmic contact , composite material , chemistry , electrode , organic chemistry , layer (electronics) , molecule
The surface roughness of a metal may be used as a criterion for the determination of the number and the size of microgeometric corrosion elements. It is then possible to asses the corrosion effect (in terms of corrosion current) of such a microgalvanic cell, disregarding the ohmic resistance which amounts just to some per cent of the total resistance (i.e. anodic and cathodic polarizability); for the sake of simplification, the microelements may be assumed to have an idealized shape consisting of parallel cylindrical protuberances and depressions. The calculated results are in reasonable agreement with the experimental data.