(北京有色金属研究总院，北京 100088)
摘 要: 通过在3种典型大气环境中进行为期20年的现场暴露试验，研究海军黄铜HSn62−1的腐蚀质量损失和力学性能损失，采用扫描电子显微镜和XRD观察和分析腐蚀外貌、横截面和腐蚀产物。结果表明：HSn62−1的长期大气腐蚀质量损失随暴露时间的关系遵循C=KTn，腐蚀质量损失在工业酸雨大气环境中最大，在海洋大气环境中最小；腐蚀速率在工业酸雨和海洋大气环境中随时间逐渐降低，而在半乡村大气中逐渐升高；暴露20年后，HSn62−1的力学性能损失在工业酸雨大气环境中最大，在半乡村环境中最小；HSn62−1在3种典型大气环境中均发生脱锌腐蚀，腐蚀产物主要为Cu2O和ZnO。
关键字: HSn62−1；大气腐蚀；脱锌；腐蚀质量损失；力学性能
（General Research Institute for Nonferrous Metals, Beijing 100088, China）
Abstract:Atmospheric corrosion behavior of naval brass HSn62−1 was investigated in three typical atmospheres in China over 20 years. Mass loss and mechanical property loss were measured, and the appearance, cross-section and corrosion products were observed and analyzed by scanning electronic microscope and XRD. The results show that the mass loss data with exposure time obeys well with power function C=KT n, the mass loss is the highest in industrial atmosphere and the lowest in tropical marine atmosphere. The corrosion rate decreases with time in industrial atmosphere and tropical marine atmosphere, and increases with time in semi-rural atmosphere. After being exposed for 20 years, the mechanical property loss of HSn62−1 is the highest in industrial atmosphere and the lowest in semi-rural atmosphere. The dezincification of HSn62−1 occurs in all the three typical atmospheres, and the main corrosion products are Cu2O and ZnO.
Key words: HSn62-1; atmospheric corrosion; dezincification; corrosion mass loss; mechanical property
