铝合金表面腐蚀损伤面积等效方法分析

摘要

Objective To analyze equivalent method of surface corrosion damage area of aluminum alloy. Methods The KH-7700 3D optical microscopy was used for corrosion image processing. Elliptical rules of geometry were used to correct corrosion damage area. Combined with the Gumbel, normal, two-parameter Weibull and log normal model, the distribution analysis of corrected corrosion damage area was conducted. Results Compared with correlation coefficient, it was concluded that the corrosion damage area correction obeyed the normal distribution model superior to the Gumbel, two parameter Weibull and log normal model. Conclusion Rectangle inscribed ellipse more truly reflected the corrosion damage of the area, so it can provide technical support for quantitative analysis of corrosion damage in engineering practice.%目的 研究铝合金表面腐蚀损伤面积等效的方法 .方法 利用KH-7700三维光学显微镜进行腐蚀图像处理,通过椭圆等规则几何图形修正腐蚀损伤面积,并结合Gumbel、正态、双参数威布尔及对数正态四种分布模型行对腐蚀损伤修正面积进行分布检验分析.结果 对比相关系数,得出腐蚀损伤修正面积服从正态分布模型优于Gumbel、对数正态及双参数威布尔三种分布模型.结论 矩形内切椭圆能较真实地反映腐蚀损伤的面积,可为工程实践使用腐蚀损伤定量分析时,提供技术支持.