根据某海域的环境数据编制了当量加速腐蚀试验谱,实验室条件下腐蚀约8 d与海洋环境下腐蚀1 a相当,对7804铝合金材料进行了不同当量腐蚀年限的盐雾腐蚀试验;采用三维显微镜对腐蚀损伤进行观察和测量,采用腐蚀深度、截面积和无量纲参数等参数作为腐蚀损伤的表征量,分析了不同腐蚀时间的腐蚀坑的微观形貌特征,研究了各表征量的分布特性及随腐蚀时间的变化规律。 Based on the environmental data of a certain sea area, a series of equivalent accelerated corrosion test spectra were prepared. The corrosion rate of the 7804 aluminum alloy was equivalent to that of the marine environment for a period of about 8 days under laboratory conditions. The corrosion damage was observed and measured with a microscope. The corrosion depth, cross-sectional area and dimensionless parameters were used as the characterization of corrosion damage. The microscopic morphology of the corrosion pits with different corrosion time was analyzed. The distribution characteristics And with the variation of corrosion time.