作者：刘丽娜1, 刘涛2
作者单位：1. 南京航空航天大学金城学院, 江苏 南京 211156;
2. 北京迈达斯技术有限公司, 北京 100044
关键词：图像处理;腐蚀试验;电弧喷铝;二值化;腐蚀评定
摘要：
为研究钢箱梁电弧喷铝防腐涂层防腐机理,预测其防腐寿命,加工制作钢板试样,表面电弧喷铝涂层,进行室内加速腐蚀试验。通过平板扫描仪采集对象图像,观测腐蚀发展过程。采用基于二值化图像的图像处理技术提取腐蚀形貌图像特征参数,并结合规范评定涂层腐蚀损伤级别。研究结果表明:基于二值化图像的图像处理技术可以有效区分涂层腐蚀与未腐蚀区域,实现涂层腐蚀面积定量化分析,为防腐涂层腐蚀等级评定提供新的思路,并估算200m喷铝涂层实际海洋大气环境下的寿命为63.6年。
Image analysis of arc sprayed aluminum anticorrosive coating on steel box girder based on nondestructive test
LIU Li'na1, LIU Tao2
1. Jincheng College, Nanjing University of Aeronautics and Astronautics, Nanjing 211156, China;
2. MIDAS Information Technology Co., Ltd., Beijing 100044, China
Abstract: To study the anticorrosion mechanism of arc-sprayed aluminum anticorrosive coating on steel box girder and to predict the anticorrosive life of the coating, steel plates were manufactured and painted with aluminum on the surfaces to carry out indoor accelerated corrosion test. Corrosion image of the organic protection coating was collected by a flat scanner to observe its corrosion process. The blistering area was extracted through image processing technology to evaluate the corrosion grade. The results demonstrate that the image processing technology based on binary image can distinguish the corrosion areas from the non-corrosion areas so as to realize quantitative analysis for coating corrosion area. With the help of this technology, a new way has been presented for assessing the corrosion grade of anticorrosive coatings and the service life of 200μm aluminum coating has been estimated to be 63.6 years in the actual marine atmospheric environment.
Keywords: image processing;corrosion test;arc sprayed aluminium;binarization;corrosion evalution
2015, 41(11): 124-128 收稿日期: 2015-03-02;收到修改稿日期: 2015-04-21
基金项目:
作者简介: 刘丽娜(1981-),女,江苏南京市人,讲师,硕士,主要从事民航机电工程。
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