THE ACTION OF ADSORPTIVE INHIBITORS IN SOME CORROSIVE SYSTEMS
Technical rept. no. 4
MCMASTER UNIV HAMILTON (ONTARIO)
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A review is made of the proposed mechanics of adsorptive inhibitors on crystalline surfaces, as substantiated by experimental activity in recent years. In particular, detailed consideration is given to the profound effects that can be wrought by small quantities ppm of suitable ions in aqueous solution on the dissolution of alkali halide crystals. Radio-tracer experiments were performed in order to deduce adsorption isotherms for iron adsorbed on lithium fluoride surfaces from dilute solutions of ferric chloride. The results support the concept of inhibitor control by action at the kink sites in an otherwise close-packed crystal surface, and the etch morphologies obtained may be successfully related to such a concept. It is proposed that the theories may be extrapolated to cases of metallic corrosion controlled by inhibitors which act by means other than the creation of a continuous passive film.
- Inorganic Chemistry