The electrochemical polarization behavior of the copper-containing Al 2024-T3 alloy in deaerated 0.01 M NaCl saturated with a number of solid inhibitors demonstrates that one of the compounds examined, barium metaborate, exhibits an inhibiting power in excess of that of zinc chromate. Electrochemical polarization of a synthetic theta-phase CuAl2 intermetallic in aerated 0.01 M NaCl with and without the presence of the barium metaborate and zinc chromate inhibitors has also been examined.