Inhibition Effect of Thallium Cations on Aluminum Corrosion in Hydrochloride Solutions
V. V. Bartenev* and O. I. Barteneva**
* Rostov State University, ul. Zorge 7, Rostov-on-Don, 344090 Russia
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** Research Institute of Physical and Organic Chemistry,
pr. Stachki 194/2, Rostov-on-Don, 344090 Russia
Received February 25, 2004
Abstract — The effect of contact thallium deposition on the corrosion rate of aluminum in hydrochloride solutions is studied. When a fraction of “metal” depolarization of aluminum corrosion is insignificant, the corrosion rate depends on the aluminum surface coverage with thallium deposit and the time. Partial inhibition coefficients, which are associated with the variations in the free-corrosion potential (K
E) and in the fraction of aluminum surface area occupied by thallium deposit (Ks), are calculated. The variations of partial inhibition coefficients Ks and KE with the variations of thallium iodide concentration and the corrosion test time are analyzed.
E) and in the fraction of aluminum surface area occupied by thallium deposit (Ks), are calculated. The variations of partial inhibition coefficients Ks and KE with the variations of thallium iodide concentration and the corrosion test time are analyzed.