The cathodic roles of O2 are well established for iron during a potentiodynamic scan, but does it drive a specific anodic reaction? Why? Or why not?
I discuss similar questions in my thesis (dare.uva.nl/record/457051)
I've seen charge build up in the surfaces being affected by ion availability. deoxygenated zones produce a strong anodic charge on the surface of the metal...producing a strong cathodic area at oxygen interfacing areas. Its more of a symbiosis to produce accelerated localized corrosion. otherwise you'll have general surface corrosion.
To Antonio
I guess that with "deoxygenated zones produce a strong anodic charge on the surface of the metal" you mean a strong anodic current (could be carried by Fe2+ or Fe3+), as in pit corrosion. But what do you mean with 'producing a strong cathodic area at oxygen interfacing areas"? Did the cathodic current involve Fe3+ or oxygen reduction?
(the alloys that I investigated did not contain iron, BTW)
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