已锈蚀青铜在大气环境中的腐蚀发展及其保护研究

用动电位扫描法和循环伏安实验对青铜文物在模拟大气环境介质0.028 mol/L NaCl+0.01 mol/L Na2SO4+0.016 mol/L NaHCO3中的电化学行为进行了研究，探讨了CuCl、Cu2O、碱式氯化铜、混合锈对裸青铜的保护作用.结果表明：在腐蚀电位较负时，Cu2O、CuCl对基体有一定的保护性，而且保护性能优于碱式氯化铜和混合锈；在腐蚀电位较正时，Cu2O或CuCl对青铜的保护性变差，而此时碱式氯化铜和混合锈对裸青铜的保护性优于Cu2O、CuCl.0.1％MBO(2-巯基苯并恶唑)酒精溶液对裸青铜或被Cu2O、CuCl覆盖的青铜阳极过程有一定的抑制作用，对被碱式氯化铜或混合锈覆盖的青铜阳极过程有优异的抑制作用.  

CORROSION BEHAVIOR OF PATINATED BRONZE AND ITS PROTECTION IN ATMOSPHERE

Potentiodynamic scanning methods and cycle voltammetry (CV) technique were employed to study the electrochemical behavior of archaeological bronze in a medium (0.028 mol/L NaCl+0.01 mol/L Na_2SO_4+0.016 mol/L NaHCO_3) simulating atmosphere corrosion.The study focused on the protection performance provided by CuCl,Cu_2O,Cu_2(OH)_3Cl and mixed patina to bare bronze,and the results are that when the corrosion potentials are relatively negative,CuCl and Cu_2O respectively exibibit to be protective to bare bronze to certain extent,and they perform more effective than that of Cu_2(OH)_3Cl or mixed patina's.On the other hand when the corrosion potentials are relatively positive the protectiveness of CuCl or Cu_2O to bare bronze turn to poor and Cu_2(OH)_3Cl or mixed patina exhibit better protective to bare bronze than that of CuCl or Cu_2O.The 0.1%MBO (2-Mercaptobenzoxazole) alcohol solution can suppress anodic reactons of bare bronze or bronze covered with CuCl or Cu_2O to some extent and can obviovsly suppress that of bronze covered with Cu_2(OH)_3Cl or mixed patina.