Clarence Garlan Law

A Model for the Anodic-Dissolution of Iron in Sulfuric-Acid:

Potential and currertt distributions are calculated for a partially passivated rotating disk electrode. A discontinuous local polarization relation is used to reflect the change from the active to the passive state. Results of the model yield a z~shaped polarization curve similar to curves measured experimentally by Epelboin et al. The limiting cases of mass transfer control and ohmic control are treated. Comparison of previous experimental results with the model is in harmony with the conclusion that the electrode is mass transfer controlled in the transition region.

Corrosion of a Rotating Iron Disk in Laminar, Transition, and Fully Developed Turbulent Flow

Modele de corrosion electrochimique qui tient compte des differents regimes hydrodynamiques en travers de la surface, des variations du potentiel ohmique et de la simultaneite de la reduction de loxygene et de loxydation du fer. La transition active-passive du fer est supposee se produire a une valeur specifique du potentiel de lelectrode. Les resultats illustrent limportance de la dimension du disque, de la concentration de loxygene et de la conductivite de la solution sur la distribution des vitesses de corrosion