The corrosion inhibition produced on commercial-purity brass (70% Cu, 30% Zn) is investigated. The efficiency of the inhibitors is considered for immersion of brass specimens in a wide variety of solutions and comparisons are drawn with similar studies on copper. Triazole reduces the rate of corrosion of brass immersed in certainmildly corrosive media but accelerates attack in acidic solutions. Naphthotriazole is a superior inhibitor to triazole and is often better than benzotriazole in acidic solutions. The use of higher concentrations of the latter can compensate for deficiencies compared to naphthotriazole which itself has the disadvantage of greater expense. Anomalies exist in generalizations on the effectiveness of the three inhibitors: whereas naphthotriazole provides good inhibition to brass in sodium hydroxide solution, both benzotriazole and triazole increase the rate of corrosion. The converse situation operates in ammonium sulfate solution (See also AATA 12-1297.) -- AATA