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Wet or electrochemical corrosion requires

  • A.two metals of identical electrode potential in contact
  • B.an electrolyte in contact with the metal
  • C.a temperature above 200 degrees Celsius
  • D.the complete absence of oxygen

Answer: B

Anodic and cathodic areas on the surface are connected through the metal and through the solution, so a short-circuited galvanic cell is set up. Rain, condensation, soil moisture or a film of electrolyte a few molecules thick is enough to start it.

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