In the process of rust removal, the harmful rust and other impurities on bronze need to be removed, but the original appearance of the bronze ware should be preserved. So the degree of rust removal needs to be well controlled. In this study a weight-loss method was applied to assess the intensity of rust removal, as well as different methods and rust removal solutions for cleaning copper coins. The results show that the copper coins lose weight clearly both by physical and chemical rust removal methods. For chemical rust removal, 5% glacial acetic acid has a good effect. The sheet copper pieces are protected by solutions of the corrosion inhibitor, benzotriazole (BTA), of different concentrations in different kinds of solvents. According to Tafel curve analysis, the corrosion inhibitor colution 1.5% BTA +2% H2O2, has a good corrosion inhibiting effect on the sheet copper pieces. The result was confirmed in the salt fog corrosion apparatus.