Coupled-currents approach to thermal oxidation

If we inquire as to the differences between thermal and anodic oxidation, we can list some which are a matter of degree and others which are 

We can think of the coupled-currents approach to metal oxidation in terms of the following logical sequence. 

As one example of a coupled-currents theory, the growth of very thick oxide films under local space-charge neutrality conditions will be considered in detail in the following section. 

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