tailieunhanh - Summary of thesis in Materials science: Research on fabrication and characteristic properties of zirconium oxide film combination with silane on steel substrate as pretreatment for organic coating
Preparing of zirconia/silane combined films on steel subtrate for organic coatings to replace phosphate and chromate pretreatment; proposing the mechanism of film formation process and assessing characteristics of morphology, composition, electrochemical properties and bonding of the zirconia/silane film. | MINISTRY OF VIETNAM ACADEMY OF EDUCATION AND TRAINING SCIENCE AND TECHNOLOGY GRADATE UNIVERSIY OF SCIENCE AND TECHNOLOGY ----------------------------- NGUYEN VAN CHI RESEARCH ON FABRICATION AND CHARACTERISTIC PROPERTIES OF ZIRCONIUM OXIDE FILM COMBINATION WITH SILANE ON STEEL SUBSTRATE AS PRETREATMENT FOR ORGANIC COATING Major Metal Code SUMMARY OF DOCTORAL THESIS IN MATERIALS SCIENCE Ha Noi 2020 This thesis was done at Graduate University of Science and Technology - Vietnam Academy of Science and Technology Supervisors 1 Dr. PHAM Trung San Supervisors 2 . Dr. TO Thi Xuan Hang Reviewer 1 . Reviewer 2 . Reviewer 3 . The dissertation will be defended at Graduate University of Science and Technology 18 Hoang Quoc Viet street Hanoi. Time . . 2020 This thesis could be found at National Library of Vietnam Library of Graduate University of Science and Technology Library of Institute of Materials and Science Library of Vietnam Academy of Science and Technology INTRODUCTION The urgency of the thesis Surface pretreatment of the steel substrate before painting had significant effect on coating adhesion and corrosion protection performance. Pretreatment not only increases the adhesion between the paint and the substrate but also improves the long-term corrosion protection. Phosphate or chromate pretreatment has been widely used for this purpose. However these methods are often increasingly restricted by international conventions because of several drawbacks from environmental energy and process points of view. The trend of finding alternative methods has been interested in research and application recently. These conversion coatings are usually transition metal oxides such as zirconium titanium vanadium molybdenum. Among them A promising emerging pretreatment technique is one of potential replacements for phosphating and one of them is the application of zirconium oxide or organo-silane. The outstanding advantage of zirconia is that the film is made of .
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