(北京有色金屬研究總院，北京 100088)
摘 要: 通過在3種典型大氣環(huán)境中進(jìn)行為期20年的現(xiàn)場暴露試驗(yàn)，研究海軍黃銅HSn62−1的腐蝕質(zhì)量損失和力學(xué)性能損失，采用掃描電子顯微鏡和XRD觀察和分析腐蝕外貌、橫截面和腐蝕產(chǎn)物。結(jié)果表明：HSn62−1的長期大氣腐蝕質(zhì)量損失隨暴露時(shí)間的關(guān)系遵循C=KTn，腐蝕質(zhì)量損失在工業(yè)酸雨大氣環(huán)境中最大，在海洋大氣環(huán)境中最小；腐蝕速率在工業(yè)酸雨和海洋大氣環(huán)境中隨時(shí)間逐漸降低，而在半鄉(xiāng)村大氣中逐漸升高；暴露20年后，HSn62−1的力學(xué)性能損失在工業(yè)酸雨大氣環(huán)境中最大，在半鄉(xiāng)村環(huán)境中最小；HSn62−1在3種典型大氣環(huán)境中均發(fā)生脫鋅腐蝕，腐蝕產(chǎn)物主要為Cu2O和ZnO。
關(guān)鍵字: HSn62−1；大氣腐蝕；脫鋅；腐蝕質(zhì)量損失；力學(xué)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
