| SUN Kuo-teng,CAI Wei-chen,ZHOU Jing-zhong,ZHONG Wan-cai,WEI Yang-zhi,ZHAO Zhong-xian,ZHAO Yuan-tao,LI Wen-ge.Properties of Moisture Curing Graphene Modified Marine Anticorrosive Coatings[J],49(9):339-347 |
| Properties of Moisture Curing Graphene Modified Marine Anticorrosive Coatings |
| Received:February 25, 2020 Revised:September 20, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2020.09.039 |
| KeyWord:metal components aluminum flake graphene marine anticorrosion environmentally friendly cathodic protection damp heat industries and marine atmospheric |
| Author | Institution |
| SUN Kuo-teng |
1.Liuzhou Bureau of EHV Transmission Company of China Southern Power Grid Co. Ltd, Liuzhou , China |
| CAI Wei-chen |
1.Liuzhou Bureau of EHV Transmission Company of China Southern Power Grid Co. Ltd, Liuzhou , China |
| ZHOU Jing-zhong |
1.Liuzhou Bureau of EHV Transmission Company of China Southern Power Grid Co. Ltd, Liuzhou , China |
| ZHONG Wan-cai |
1.Liuzhou Bureau of EHV Transmission Company of China Southern Power Grid Co. Ltd, Liuzhou , China |
| WEI Yang-zhi |
1.Liuzhou Bureau of EHV Transmission Company of China Southern Power Grid Co. Ltd, Liuzhou , China |
| ZHAO Zhong-xian |
2.School of Merchant Marine Engineering, Shanghai Maritime University, Shanghai , China |
| ZHAO Yuan-tao |
2.School of Merchant Marine Engineering, Shanghai Maritime University, Shanghai , China |
| LI Wen-ge |
2.School of Merchant Marine Engineering, Shanghai Maritime University, Shanghai , China |
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| Abstract: |
| The work aims to prepare a moisture curing graphene modified marine anticorrosive coating to prolong the service life of metal components such as transmission tower and test, characterize and analyze the corrosion resistance and action mechanism of film. Moisture-curable polyurethane resin was used as film-forming material aluminum flake as conductive filler instead of traditional zine powder and graphene as a modifier to form a composite conductive filler system and prepare the moisture curing graphene modified marine anticorrosive coating with positioning agent and other additives. The conventional physicochemical properties, corrosion resistance and micro-morphology of coating were characterized and analyzed by settlement test, water contact angle, electrochemical test, scanning electron microscope (SEM) and neutral salt spray test, and its anti-corrosion mechanism of graphene-aluminum flake composite protection system was discussed. Positioning agents were conductive to improving the dispersion and stability of coatings. After graphene modification, the conventional physicochemical properties such as bonding strength, saltwater resistance, and weather resistance of the marine anticorrosive coating were significantly improved, and the solid content exceeded 70%, achieving high solid environmental protection requirements, the water contact angle increased to 115°, the hydrophobicity of the coating was effectively improved, and there were obvious signs of corrosion at the scratches of the coating when the neutral salt spray test was performed for 1000 h, but the surface did not have defects such as blistering, peeling, and unilateral corrosion less than 2 mm on one side. When the graphene content was 0.8%, the coating performance was the best, and the salt spray resistance time was more than 5000 h and the wet bonding strength of the coating still reached 8.3 MPa, the electrochemical corrosion rate was only 0.011 673 mm/a, and the corrosion resistance was excellent. Graphene-aluminum flake composite protection system with excellent mechanical properties, mechanical closure and cathodic protection is a kind of bottom-in-one paint and suitable for anti-corrosion work of damp heat industries and marine atmospheric environment. |
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