Or. Mattos, ANODIC-DISSOLUTION OF METALS - PROCESS-CO NTROL BY MASS-TRANSPORT, Journal de chimie physique et de physico-chimie biologique, 93(4), 1996, pp. 777-792
There are many parameters involved in the anodic dissolution of metals
. Stationary methods are not enough for describing the dissolution kin
etics in a way to better interpret the corrosion processes. The use of
electrochemical and electrohydrodynamic impedances gives complementar
y information. The analysis of the EHD impedance together with station
ary results. has implied the elaboration of mechanisms, taking into ac
count mass transport processes in the electrolyte or, at the interface
neighbourhood. Two examples will illustrate this discussion: (i) Iron
anodic dissolution in sulphuric acid. which involves a viscosity grad
ient from the interface to the solution; (ii) Cooper anodic dissolutio
n in chlorhydric acid, which involves a salt layer covering the interf
ace.