Browse > Article
http://dx.doi.org/10.3740/MRSK.2021.31.12.704

Effect of Flux Chloride Composition on Microstructure and Coating Properties of Zn-Mg-Al Ternary Alloy Coated Steel Product  

Kim, Ki-Yeon (Division of Advanced Materials Engineering, Jeonbuk National University)
So, Seong-Min (Division of Advanced Materials Engineering, Jeonbuk National University)
Oh, Min-Suk (Division of Advanced Materials Engineering, Jeonbuk National University)
Publication Information
Korean Journal of Materials Research / v.31, no.12, 2021 , pp. 704-709 More about this Journal
Abstract
In the flux used in the batch galvanizing process, the effect of the component ratio of NH4Cl to ZnCl2 on the microstructure, coating adhesion, and corrosion resistance of Zn-Mg-Al ternary alloy-coated steel is evaluated. Many defects such as cracks and bare spots are formed inside the Zn-Mg-Al coating layer during treatment with the flux composition generally used for Zn coating. Deterioration of the coating property is due to the formation of AlClx mixture generated by the reaction of Al element and chloride in the flux. The coatability of the Zn-Mg-Al alloy coating is improved by increasing the content of ZnCl2 in the flux to reduce the amount of chlorine reacting with Al while maintaining the flux effect and the coating adhesion is improved as the component ratio of NH4Cl to ZnCl2 decreases. Zn-Mg-Al alloy-coated steel products treated with the optimized flux composition of NH4Cl·3ZnCl2 show superior corrosion resistance compared to Zn-coated steel products, even with a coating weight of 60 %.
Keywords
surface treatment; wet coating; flux; micro structure;
Citations & Related Records
연도 인용수 순위
  • Reference
1 C. E. Jordan and A. R. Marder, J. Mater. Sci., 32, 5593 (1997).   DOI
2 L. Chen, R. Fourmentin and J. R. Mcdermid, Metall. Mater. Trans. A., 39, 2128 (2008).   DOI
3 R. Krieg, A. Vimalanandan and M. Rohwerder, J. Electrochem. Soc., 161, C156 (2014).   DOI
4 M. Dutta, A. K. Halder and S. B. Singh, Surf. Coat. Technol., 205, 2578 (2010).   DOI
5 N. C. Hosking, M. A. Strom, P. H. Shipway and C. D. Rudd, Corros. Sci., 49, 3669 (2007).   DOI
6 H. Asgari, M. R. Toroghinejad and M. A. Golozar, Curr. Appl. Phys., 9, 59 (2009).   DOI
7 T. H. Cook, Met. Finish., 101, 22 (2003).   DOI
8 J. W. Lee, S. Y. Oh, B. Park, M. S. Oh and S. J. Kim, Korean J. Met. Mater., 58, 610 (2020).   DOI
9 J. Xu, B. Li and X. Mi, Hans J. Chem. Eng. Technol., 6, 71 (2016).   DOI
10 N. Pistofidis, G. Vourlias, S. Konidaris, E. Pavlidou, G. Stergioudis and D. Tsipas, Cryst. Res. Technol., 41, 759 (2006).   DOI
11 M. S. Oh, S. H. Kim, J. S. Kim, J. W. Lee, J. H. Shon and Y. S. Jin, Met. Mater. Int., 22, 26 (2016).   DOI
12 S. Schuerz, M. Fleischanderl, G. H. Luckeneder, K. Preis, T. Haunschmied, G. Mori and A. C. Kneissl, Corros. Sci., 51, 2355 (2009).   DOI
13 M. Manna, Surf. Coat. Technol., 205, 3716 (2011).   DOI
14 T. Liu, R. Ma, Y. Fan, A. Du, X. Zhao, M. Wen and X. Cao, Surf. Coat. Technol., 337, 270 (2018).   DOI
15 ASTM international. Standard Practice for Operating Salt Spray (Fog) Apparatus. Products & Services. Retrieved December 17, 2021 from https://www.astm.org/b0117-19.html.
16 D. Kopycinski and E. Guzik, Solid State Phenom., 197, 77 (2013).   DOI
17 R. F. Lynch, J. Met., 8, 39 (1987).
18 T. Harada, Bull. Chem. Soc. Jpn., 10, 379 (1935).   DOI
19 E. Diler, B. Rouvellou, S. Rioual, B. Lescop, G. Nguyen Vien, D. Thierry, Corros. Sci., 87, 111 (2014).   DOI
20 P. Maass, P. Peissker, Handbook of Hot-dip Galvanization, p.29-90, Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim (2011).
21 F. Sjoukes, Anti-Corros. Methods Mater., 37, 12 (1990).   DOI
22 N. Pistofidis, G. Vourlias, S. Konidaris, E. Pavlidou, A. Stergiou and G. Stergioudis, Mater. Lett., 60, 786 (2006).   DOI
23 A. R. Marder, Prog. Mater. Sci., 45, 191 (2000).   DOI
24 A. Amadeh, B. Pahlevani and S. Heshmati-Manesh, Corros. Sci., 44, 2321 (2002).   DOI
25 J. W. Lee, B. R. Park, S. Y. Oh, D. W. Yun, J. K. Hwang, M. S. Oh and S. J. Kim, Corros. Sci., 160, 108170 (2019).   DOI
26 A. Du, Y. Huo and J. Hu, Adv. Mater. Res., 433, 111 (2012).   DOI
27 L. A. Rocha and M. A. Barbosa, Corrosion, 47, 536 (1991).   DOI
28 H. C. Shih, J. W. Hsu, C. N. Sun and S. C. Chung, Surf. Coat. Technol., 150, 70 (2002).   DOI
29 M. Saternus and H. Kania, Materials., 14, 1259 (2021).   DOI