| ZHAO Xia,ZHU Yong-hao,JIN Zu-quan,ZHAO Qing-kun,MA Fu-bin,DUAN Ji-zhou,HOU Bao-rong.Performance of Anticorrosive Coatings Modified with Long Afterglow Luminescent Materials/Superhydrophobic Particles[J],52(11):49-62 |
| Performance of Anticorrosive Coatings Modified with Long Afterglow Luminescent Materials/Superhydrophobic Particles |
| Received:August 23, 2023 Revised:October 27, 2023 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2023.11.004 |
| KeyWord:metal corrosion resistance luminescence superhydrophobic coating electrochemical impedance spectroscopy |
| Author | Institution |
| ZHAO Xia |
Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Science, Shandong Qingdao , China;Qingdao University of Technology, Shandong Qingdao , China |
| ZHU Yong-hao |
Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Science, Shandong Qingdao , China;University of Chinese Academy of Sciences, Beijing , China |
| JIN Zu-quan |
Qingdao University of Technology, Shandong Qingdao , China |
| ZHAO Qing-kun |
Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Science, Shandong Qingdao , China;Qingdao University of Technology, Shandong Qingdao , China |
| MA Fu-bin |
Open Studio for Marine Corrosion and Protection, Laoshan Laboratory, Shandong Qingdao , China |
| DUAN Ji-zhou |
Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Science, Shandong Qingdao , China |
| HOU Bao-rong |
Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Science, Shandong Qingdao , China |
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| Abstract: |
| Luminescent particles possess the attributes of non-electrical luminescence, environmental friendliness, and remarkable endurance, thereby bestowing immense significance in the domains of imaging, sensing, display, and warning. Adding luminescent particles to organic resins can endow marine environmental indicator materials with the ability to be visible at night. Moreover, the luminescent particles can be filled into the pores of the coating to isolate corrosion factors, thus improving the corrosion resistance of the coating. However, the application of luminescent particles in marine coatings is limited due to their insufficient abrasion resistance and compatibility, which leads to damage and failure of the coating surface. An effective way to solve this problem is to endow luminescent particles with superhydrophobic properties. The rapid rolling of water droplets on surface endow the materials with self-cleaning, waterproofing, chemical protection and other desirable properties. Therefore, hydrophobic treatment of luminescent particles and compositing with organic resin to form a warning superhydrophobic coating to protect the surface of carbon steel is beneficial for expanding the application field of luminescent materials and improving their adaptability and durability in harsh environments. In this paper, the luminescent particles were modified by stearic acid, and then, FT-IR, XPS, XRD and TGA were employed to analyze the chemical composition of the modified luminescent particles. The successfully modified luminescent particles were uniformly dispersed in the epoxy resin solution with hydrophobic kaolin and hydrophobic silica particles. The mixed solution was then brushed onto the carbon steel surface, and the target coating was obtained after curing. The effects of different particle ratios on the luminescence and hydrophobic properties, as well as on the wettability, abrasion resistanc and corrosion resistance of the modified composite coatings were investigated. The wettability and micromorphology of the coating surface were tested and observed by contact angle measurement, SEM and LSCM, respectively. The wear resistance and corrosion resistance of the coatings were tested by sandpaper abrasion, salt spray and EIS, respectively. The change of luminescence intensity of the coatings before and after salt spray was tested with a screen luminometer. When the mass ratio of hydrophobic kaolin particles to modified luminescent particles in the coating was 1∶4, the best effect was achieved. At this ratio, the coating still maintained superhydrophobic after 20 wear cycles, with only a mass loss of 10.79%. The impedance of the coating remained above 1010 Ω.cm2 after 60 days of salt spray test, and the impedance of the coating decreased to 2.4×109 Ω.cm2 after 15 wet and dry cycles. The results of EIS indicated that the coating had good salt spray resistance and dry-wet cycle resistance. After 60 days of salt spray test, the coating containing the highest proportion of modified luminescent particles could maintain high luminescence intensity with minimal reduction in luminescence intensity. In summary, the modification of luminescent particles with stearic acid improves their luminescent durability in aqueous environments. The coating prepared after compositing with organic resin has good hydrophobicity and excellent wear resistance, and thus has good anti-corrosion performance. The preparation and research of this coating are expected to provide reference and assistance for the long-term and effective application of metal based indicator markers in special marine environments. |
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