Abstract
The cyclic sweep polarization behaviour of iron in sodium hydroxide solutions in the temp. range 200–250°C is investigated using a new pressure-balanced electrochemical cell which is fully described. It is shown that the corrosion of iron in this environment takes place at a potential which is controlled by the hydrogen electrode reaction. Active dissolution of the metal is not observed, confirming the existence of a solid-state barrier layer between the metal and the solution in the porous oxide.
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