In this study, the electrochemical behavior of carbon steel surface treated in H2ZrF6/silane solution was investigated. The impact of immersion time on the morphology and the composition of ZrO2/silane film was evaluated and the effect of ZrO2/silane pretreatment on corrosion protection of powder coating was studied. | Corrosion protection of carbon steel using zirconium oxide/silane pretreatment and powder coating Vietnam Journal of Science and Technology 57 (1) (2019) 38-47 doi: CORROSION PROTECTION OF CARBON STEEL USING ZIRCONIUM OXIDE/SILANE PRETREATMENT AND POWDER COATING Nguyen Van Chi1, 2, *, Pham Trung San2, 3, *, To Thi Xuan Hang2, 4, Le Thi Nhung3, Truong Anh Khoa3, Nguyen Hoang3, Nguyen Thu Hien3 1 Coastal Branch, Vietnam - Russia Tropical Center, 30 Nguyen Thien Thuat, Nha Trang, Khanh Hoa 2 Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi 3 Nha Trang Institute of Technology Research and Application, Vietnam Academy of Science and Technology, 2 Hung Vuong, Nha Trang, Khanh Hoa 4 Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi * Email: nguyenvanchirvtc@, phamtrungsan@ Received: 13 April 2018; Accepted for publication: 1 December 2018 Abstract. A new generation of metal pretreatments based on nanosized zirconium oxide or ogranosilane film has been investigated recently as an alternative method to phosphatation. In this paper, ZrO2/silane composite film on carbon steel was prepared and characterized by field emission scanning electron microscopy, energy dispersive X-ray spectrum and electrochemical measurements. The effect of ZrO2/silane surface treatment on the corrosion protection properties of powder coating was studied by spraying salt and adhesion measurement. The results showed that ZrO2 was rapidly precipitated on the steel surface in the first minute of immersion. ZrO2/silane film was formed after 4 minutes of immersion and gave the best protective property. Powder coating on carbon steel with ZrO2/silane pretreatment had equivalent protection performance like the powder coating with phosphate pretreatment. .
