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- Author or Editor: I. Plonski x
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Abstract
Inhibited buffer-complexing ferrous citrate+citric acid solutions, 2.5<pH<3.5, at 363±5K, is used to dissolve a compact magnetite layer grown on low alloyed steel in a nuclear plant generator. The average rate of oxide dissolution is 40 
m/h. Similarly, a compact duplex layer of magnetite covered by hematite formed on a carbon steel pipe of a classical heat exchanger dissolves in less than 10 h. The mean rate of metal uniform corrosion ranges between 1 and 9 mg/cm2 h depending on pH, inhibitors and citrate ion concentration.
Abstract
The removal of contaminated high temperature grown magnetite on carbon steel in buffered HCl-disodium citrate solutions has been studied. Decontamination factors higher than 200 concomitantly with a dissolution of metal substrate lower than 1 
m after 1 hour treatment have been obtained.
