Synthesis of hybrid silica sol–gel coatings containing Zn particles on carbon steel and Al/Zn coated carbon steel |
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| Affiliation: | 1. INTEMA – Universidad Nacional de Mar del Plata – CONICET, Juan B. Justo 4302, Mar del Plata B7608FDQ, Argentina;2. Instituto de Cerámica y Vidrio (C.S.I.C.), Campus de Cantoblanco, 28049 Madrid, Spain;1. Earth Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 74R-316C, Berkeley, CA 94720-8126, USA;2. Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan;3. Japan Atomic Energy Agency, 7-1 Omachi, Taira, Iwaki-shi, Fukushima 970-8026, Japan;4. Japan Atomic Energy Agency, 2-2-2 Uchisawai-cho, Chiyoda, Tokyo, 100-0011, Japan;1. Nanostructures Research Laboratory, Japan Fine Ceramics Center, Nagoya 456-8587, Japan;2. Faculty of Engineering, Shinshu University, Nagano 380-8553, Japan;3. Battery Materials Division, Toyota Motor Corporation, Susono 410-1193, Japan;4. Institute of Engineering Innovation, The University of Tokyo, Tokyo 113-8586, Japan;1. Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA;2. Institute of Materials Science, Technische Universität Darmstadt, Darmstadt 64287, Germany;1. Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea;2. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea;3. Agency for Defense Development, Daejeon 34186, South Korea |
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| Abstract: | Owing to increasing interest of coatings applied on low alloy steel and galvanised metal plates and their applications, this work presents the study of the process requirements to be fulfilled in order to coat these metals with an hybrid silica coatings containing Zn particles. The main idea was to combine the “barrier” effect of the hybrid silica coatings with the “active protection” effect of the zinc particles inside the coatings. Sol–gel parameters, Zn particles content and suspension stability have been studied. EMPHOS ES 21, an electrostatic dispersant, has been used to obtain stabilised suspensions. Thick, adherent and crack-free coatings containing 10% Zn particles were prepared by dip-coating on carbon steel and Al/Zn coated carbon steel substrates. The applied coating seems to improve corrosion protection of the two metal substrates, and this effect is more noticeable in the case of the Al/Zn system because of the combination of the complementary corrosion protection properties of both coatings. |
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