Electrochemical reaction is caused by the contact of
- bonding.
- moisture on the surface of the metal.
- dissimilar metals.
Explanation from PART66Online
An electrochemical corrosion reaction needs an electrolyte to carry current between anodic and cathodic sites; on an airframe this is supplied by moisture on the metal surface. Dissimilar metals or a bond merely set up or control the potential difference, but without the surface moisture acting as electrolyte the reaction cannot proceed.
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Leehenson asked · 18 Sep 2016
Wouldn't C be correct as 'electrochemical' corrosion requires a anode and a cathode, where as a 'chemical' corrosion being oxidation would be moisture on the surface of the metal? Please help? Thanks.
Community Comments (5)
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PART66Online
25 Sep 2016
Hi Leehenson. Two dissimilar metals in contact will initiate galvanic corrosion, not electro-chemical. But metal + some electrolyte = electro-chemical corrosion.
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Leehenson
25 Sep 2016
Thanks for reply, but I'm still not sure about this question as galvanic corrosion is electrochemical?
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Rtrump
25 Sep 2016
lee your wrong so pipe down
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PART66Online
26 Sep 2016
Actually question is not about corrosion, just about reaction. Here is article in britannica which may help: britannica.com/science/electrochemica...
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rwm1273
11 Oct 2016
Rtrump, if you have no valid explanation to the question, perhaps you should pipe down. Leehenson was asking a valid question which was explained by dimky.
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