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通过航空LD2材料的加速腐蚀试验,获取该材料试件不同腐蚀周期的腐蚀形貌图像,对腐蚀形貌图像进行基于数字处理技术的一系列处理,最终通过二值特征提取方法得到二值化腐蚀图像,并依据二值化结果计算LD2材料不同腐蚀周期的孔蚀率。计算结果表明,此种方法得到的孔蚀率变化规律与该材料的电化学腐蚀机理较为吻合,并且该方法克服了传统方法计算孔蚀率精确性差的问题,为航空铝合金的孔蚀率计算及相关分析提供了新思路。
Through the accelerated corrosion test of aeronautic LD2 material, the corrosion morphology images of different corrosion cycles of the material specimens were obtained, and a series of processing based on digital processing technology was performed on the corrosion morphology images. Finally, the binary feature extraction method was used to obtain the binary erosion Image, and calculate the pitting corrosion rate of different corrosion period of LD2 material according to the binarization result. The calculation results show that the change rule of the pitting corrosion rate obtained by this method is in good agreement with the electrochemical corrosion mechanism of the material, and the method overcomes the problem of poor accuracy of calculating the pitting corrosion rate by the traditional method, and calculates the pitting corrosion rate of the aviation aluminum alloy And related analysis provides a new idea.