Aging of Conductors: Diagram of Corrosion



External indications of deterioration will not be visible until the conductor is severely corroded. Contamination is brought to the wire by precipitation. The aqueous chloride ions (Cl- ) react with the aluminium strands to form AlCl3 that corrodes the galvanizing from the steel. Aluminium in electrochemical contact with the exposed steel corrodes rapidly by galvanic coupling.