EvaluaciÓn de anodos de aluminio mediante los procedimientos DNV RP B401 y NACE TM190-98

Testing of indium activated, aluminium alloy, galvanic anodes currently used in cathodic protection of steel structures immersed in sea water has been carried out using the procedures of two recommended practices, DNV RP B401 and NACE TM 190-98. These accelerated electrochemical tests are useful to obtain information about its electrochemical behaviour and corrosion characteristics, and are principally intended to serve as QA/QC indicator purposes regarding the electrochemical faradic efficiency during manufacturing process, helping as a criterion for the acceptance or rejection of a lot of anodes. Electrochemical Impedance Spectroscopy (EIS) as a non-destructive and in-situ electrochemical technique has allowed to demonstrate the evidence of passivation as well as localised corrosion (pitting) during evaluation on the samples tested.