A Silver coated conductor in an unpresurised area is subject to moisture and has a damaged coating would be likely to cause
- Wet Arc Tracking.
- Silver Migration.
- Red Plague.
Explanation from PART66Online
Red plague is the cuprous-oxide corrosion that attacks silver-plated copper conductor where the silver plating is broken and copper is exposed to moisture, particularly in unpressurised areas. The reddish-brown oxide spreads along the strands and destroys conductivity. Wet arc tracking concerns insulation breakdown and silver migration is a different plating phenomenon, so the damaged-plating-plus-moisture scenario points to red plague.
M
Mukesh Kumar asked · 1 Aug 2012
plz explain the Question and answer
Community Comments (1)
M
MridulDev
11 Sep 2013
The question is asking what'll happen if protective coating of silver coated conductor is damaged and is subjected to moisture in un-pressurized condition, answer will be "red plague" because since we know red plague is an accelerated corrosion of copper when plated with silver. Red plague is caused by normally occurring electrochemical potential between the copper and silver, leading to galvanic corrosion occurring in pits or breaks in the silver plating. It develops in the presence of moisture and oxygen when the porosity of the silver layer allows them to come in contact with the copper-silver interface.
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