TAILIEUCHUNG - High protection performance of coating systems based on zinc rich primer and fluoropolymer coating

The obtained results show that coating systems with zinc rich primer and top coatings based on fluoropolymer and polyurethane topcoats show very high weather resistance and corrosion protection performance, but the systems with fluoropolymer are better than the system with polyurethane topcoat. | Vietnam Journal of Science and Technology 56 (3B) (2018) 152-158 HIGH PROTECTION PERFORMANCE OF COATING SYSTEMS BASED ON ZINC RICH PRIMER AND FLUOROPOLYMER COATING Vu Ke Oanh1, To Thi Xuan Hang1, *, Nguyen Thuy Duong1, Nguyen Anh Son1, Trinh Anh Truc1, Pham Gia Vu1, Thai Thu Thuy1, Hiroyuki Tanabe2, Keiji Sadaishi2, Kiyoto Masuda2 1 Institute for Tropical Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam 2 Dai Nippon Toryo Co., Ltd. Fundamental Research Laboratory, 1382-12, Shimoishigami, Ohtawara, Tochigi-Pref. 324-0036 Japan * Email: ttxhang@ Received: 15 July 2018; Accepted for publication: 8 September 2018 ABSTRACT Coating systems based on zinc rich primer and fluoropolymer top coat were exposed for 8 years at different atmospheric stations in Vietnam: Ha Noi, Ha Long and Nha Trang. For comparison the coating system with zinc rich primer and polyurethane topcoat was also tested. The degradations of coating systems were evaluated by gloss measurement and electrochemical impedance spectroscopy. The obtained results show that coating systems with zinc rich primer and top coatings based on fluoropolymer and polyurethane topcoats show very high weather resistance and corrosion protection performance, but the systems with fluoropolymer are better than the system with polyurethane topcoat. Keywords: fluoropolymer, tropical atmospheric exposure, weather resistance, corrosion protection. 1. INTRODUCTION The main factors of environment which cause the degradation of coatings are sunlight (in particular UV radiation), temperature, oxygen, water and pollutants [1, 2]. Recently fluoropolymer top coatings are developed to extend the service life of coating systems because they are highly resistant to ultraviolet rays. Besides that fluoropolymers have many other desirable properties like excellent chemical resistance, good thermal stability, oil, and water resistance [3-10]. Due to high weather resistance the

• Hoá học
• Vietnam Journal of Science and Technology
• High protection performance of coating systems
• Zinc rich primer and fluoropolymer coating
• The system with polyurethane topcoat
• The systems with fluoropolymer
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