316 Prakt. Met. Sonderband 41 (2009) 
scale or growth of subscale (internal oxidation). Moreover, an algorithm that transforms the 
instantaneous electrical resistance changes to the parameter that describes the kinetics of the 
internal oxidation was defined. A comparison of internal oxidation kinetics obtained by the novel 
method shows good correlation with kinetics obtained by conventional methods (metallographic 
analysis and Wagner’s derivation). 
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