The Mechanism of the Inhibition of the Corrosion of Iron by Solutions of Sodium Orthophosphate
- 1 January 1951
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 98 (7) , 263-272
- https://doi.org/10.1149/1.2778205
Abstract
Decimolar solutions of sodium orthophosphate passivate iron at pH. values above 7.25 in the presence of air. When the solutions are deaerated the phosphate reacts with the iron forming ; potential‐time and polarization curves indicate that this reaction is mainly under cathodic control. It is suggested that oxygen dissolved in solution is mainly responsible for passivity by virtue of its heterogeneous reaction with surface iron atoms to form in a similar manner to which oxide films are formed in air.Keywords
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