构建了适用于现场暴露试样的腐蚀形貌图像采集系统,并应用该系统在北京大气腐蚀试验站对铝合金腐蚀初期的形貌图像进行跟踪采集.所得图像经过降噪处理后,应用小波变换进行分解并提取子图像的能量值.根据图像能量值的变化,对试样的腐蚀程度进行了定性和定量判断,实验结果与腐蚀失重数据分析所得结论基本一致. A corrosive topography image acquisition system suitable for field exposure samples was constructed and the system was used to track and collect the topography images of the initial stage of aluminum alloy corrosion in Beijing Atmospheric Corrosion Test Station.After the image was denoised, The energy value of sub-image was decomposed and extracted.According to the change of energy value of the image, the degree of corrosion of the sample was qualitatively and quantitatively determined, and the experimental results were basically the same as those obtained from the analysis of corrosion weight loss data.