After the hurricane Gilberto flattened (devastated) Cancun in September 1988, the submarine cables which supplied electricity to Isla Mujeres island remained very damaged, and it was decided to install the new ones. In 1989, four new submarine cables were installed from Punta Sam, Cancun to Isla Mujeres. Such cables, of normal tension 34.5 KV, were
manufactured with a galvanized steel sensor coated with asphalt, and began operation during 1990. The object of this communication is to present the experimental procedure that gave place to the armor corrosion monitoring procedure carried out in this particular case and to compare the results with three obtained on the field. Results of the cathodic protection system applied are also presented.
Keywords: galvanized steel, armor corrosion, cathodic protection, sea water.