✍ Scribed by Ing. Jaromú Toušek
No coin nor oath required. For personal study only.
In the temperature range from 6 to 40°C the temperature dependence of pitting corrosion may be expressed by the Arthenius‐equation. The lowering of the breakdown potential in this range shows a linear dependence on the reziprokal value of the absolute temperatur. From the temperature dependence of the breakdown potential and of current density it is possible to calculate the activation energy of dissolution within the pits (4,5 –4.8 kcal). In the temperature range from 40 to 70°C the temperature dependence of the breakdown potential is relatively small. This fact apparently indicates a change in pitting kinetics above 40°C. It is concluded from other results obtained that in this temperature range the formation of oxide layers in the pits is accelarating so that passivation is accelerated and the breakdown potential increases.
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