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基于激光电子散斑干涉技术(ESPI),对涂层失效过程的电子散斑干涉技术检测平台进行设计搭建,在不破坏涂层前提下,观察到浸泡失效过程中涂层的原位、实时和动态干涉条纹,并对其进行优化处理.将原位、实时观察到的条纹与零时刻条纹图像相减后进行计算机二值化处理,得到反映涂层失效信息的原位、实时及动态图像.针对环氧色漆/碳钢涂装体系,证实了电子散斑干涉技术分析的有效性,并根据其检测图像的变化,将环氧涂层的浸泡过程分为三阶段:初期没有斑点,涂层完好;中期出现模糊的斑点,涂层防护作用下降;后期出现清晰的黑色大斑点,涂层丧失防护能力.实现了涂层/金属界面失黏、膜下金属腐蚀微观发展过程原位、实时和动态的无损检测.
Based on the laser speckle speckle interferometry (ESPI), an electronic speckle speckle interferometry detection platform was designed and constructed. Without damaging the coatings, the in-situ, real-time Dynamic interference fringes, and optimize them.The in situ, real-time observed fringes and zero-time fringe images are subtracted and then processed by computer to obtain the in-situ, real-time and dynamic images that reflect the coating failure information. For the epoxy paint / carbon steel coating system, confirmed the electronic speckle interference analysis of the effectiveness of technology, and according to the changes in the test image, the epoxy coating immersion process is divided into three stages: the initial no spots, Tu The layer is intact; the mid-term appears fuzzy spots, the protective effect of the coating is reduced; a clear black spot appears later, and the coating loses the protective ability. The coating / metal interface is removed and the microscopic development process of the metal under the coating is in situ, And dynamic non-destructive testing.