Unraveling the complex infiltration and repairing behaviors in defect coatings  

作　　者：Shuaiwei Peng Tianguan Wang Guang Huang Zhuofu Tang Ziya Shao Zhiyuan Feng Bing Lei Guozhe Meng Honglei Guo 

机构地区：[1]School of Chemical Engineering and Technology,Sun Yat-sen University,Zhuhai 519082,China [2]Faculty of Science and Technology,University of Macao,E11,Avenida da Universidade,Taipa,Macao 999078,China

出　　处：《Journal of Materials Science & Technology》2024年第20期258-269,共12页材料科学技术（英文版）

基　　金：This research was financially supported by the National Key Re-search and Development Program of China(No.2019YFE0111000);the National Natural Science Foundation of China(Nos.51903257,U20A20233 and U22A20135);the Natural Science Founda-tion of Guangdong Province of China(Nos.2023A1515012275,2022A1515010805);The authors thank Zhuhai Leitong Laser Tech-nology Co.Ltd.for preparing the defect coating by laser cutter.

摘　　要：Organic coatings are commonly used to protect the metals or alloys from corrosion.However,defects such as scratches or natural aging of the coating can induce unexpected diffusion paths for the corrosive media,so the wettability of repairing liquids and the selection of suitable repairing liquids are crucial.In this study,we systematically investigated the capillary impregnation phenomenon by using liquids with various surface tensions and glass capillaries with different surface energies.We utilized this regularity to instruct the defects repairing process.By using an ultra-depth field microscope,scanning electron mi-croscope,and electrochemical analysis,two kinds of repairing liquids,high surface tension liquid(HSTL)and low surface tension liquid(LSTL),were investigated for repairing man-made defects of coatings.Our results showed that the substrate and the surface energy of the liquids significantly influence the infil-tration of the repair liquid.By effectively leveraging the relationship between the repair liquid and the substrate,the repair agent can not only establish a uniform and dense repairing layer but also notably enhance the corrosion resistance of the defective coating.This study provides valuable insights into the repairing of coating defects,as well as liquids transportation,microfluidic chip design,and surface modi-fication of microporous materials.

关 键 词：Surface energy INFILTRATION Glass capillary Repair agents 

分 类 号：TG14[一般工业技术—材料科学与工程]