Aleyna DAL, BSc. Student

Metallurgical and Materials Engineering

Yıldız Technical University

aleynadal99@gmail.com

www.linkedin.com/in/aleynadal/

 

Glass-Ceramic Coating for Steel Rebar for Construction Industry

Co-Supervisor: Nurullah Çöpoğlu

Glass-ceramic materials are inorganic polycrystalline material that shows the ceramic properties as well as glass. They can be produced by several heat treatments that result in controlled nucleation and crystallization of the glass. The basis of controlled internal crystallization lies in effective nucleation, which allows the development of fine, randomly oriented grains generally without voids, microcracks, or other porosity [1][2]. These are most commonly made by forming special base glasses, mostly by melting, and then using controlled heat treatment to nucleate and precipitate crystals in the glassy matrix [3]. The most common nucleating agents are TiO2 (titanium dioxide) and ZrO2 (zirconium dioxide) and these oxides demonstrate minimal thermal expansion partial solubility in viscous melts [4][5]. The glass-ceramic coating is used for reinforcement steel in concrete structures owing to providing advantages such as high mechanical properties, flexibility, and applicability for various applications. However, the main advantage of this study of glass-ceramic coating for steel rebar creates the physical barrier between the steel bar and the corrosive environment [6][7]. The aim of the study is that enhancing the corrosion resistance of the steel rebar by coating with glass-ceramic. This study consist of production methods of process steps of glass-ceramic coating respectively are frit preparation, substrate preparation of steel rebar, application (spray, dipping, and electrophoresis methods), drying between 80 °C-120 °C and, after all firing between 840 °C-850 °C.

[1] “Functional Glasses and Glass-Ceramics: Processing, Properties, and Applications by Basudeb Karmakar,” MRS Bulletin, vol. 43, no. 10, pp. 801–802, Oct. 2018, doi: 10.1557/mrs.2018.251.

[2] G. P. Kothiyal, A. Ananthanarayanan, and G. K. Dey, Glass and glass-ceramics. Elsevier Inc., 2012.

[3] W. Höland, V. Rheinberger, M. Schweiger, K. F. Kelton, and B. R. Haywood, “Control of nucleation in glass ceramics,” Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol. 361, no. 1804, pp. 575–589, 2003, doi: 10.1098/rsta.2002.1152.

[4] S. Rossi, N. Parziani, and C. Zanella, “Abrasion resistance of vitreous enamel coatings in function of frit composition and particles presence,” Wear, vol. 332–333, pp. 702–709, May 2015, doi: 10.1016/j.wear.2015.01.058.

[5] N. Salman Hassan, “Studying The Effect of Zircon Dioxide on The Corrosion Resistance of Porcelain Enamel,” 2011.

[6] D. Yang, F. Zheng, H. Wang, Z. Jiang, and H. Xiao, “Glass ceramic coated rebar for high corrosion resistance and enhanced rebar-concrete bond,” Magazine of Concrete Research, vol. 66, no. 4, pp. 209–216, Feb. 2014, doi: 10.1680/macr.13.00263.

[7] Y. Song et al., “Corrosion of reinforcing steel in concrete and its production,” in Science of the Total Environment, 2019, vol. 649, no. February 2010, pp. 739–748, doi: 10.1016/j.scitotenv.2018.08.362.