All Issue

2021 Vol.31, Issue 12 Preview Page
Effect of Flux Chloride Composition on Microstructure and Coating Properties of Zn-Mg-Al Ternary Alloy Coated Steel Product

플럭스 염화물 조성이 Zn-Mg-Al 3원계 합금도금층의 미세조직 및 도금성에 미치는 영향

Ki-Yeon Kim
,
Seong-Min So
,
Min-Suk Oh†
김 기연
,
소 성민
,
오 민석†
Division of Advanced Materials Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
전북대학교 신소재공학부 금속시스템공학과
†Corresponding author E-Mail : misoh@jbnu.ac.kr (M.-S. Oh, Jeonbuk Nat’l Univ.)
December 2021. pp. 704-709
PDF XML Citation
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
References
1.
H. C. Shih, J. W. Hsu, C. N. Sun and S. C. Chung, Surf. Coat. Technol., 150, 70 (2002). 10.1016/S0257-8972(01)01508-0
2.
N. Pistofidis, G. Vourlias, S. Konidaris, E. Pavlidou, A. Stergiou and G. Stergioudis, Mater. Lett., 60, 786 (2006). 10.1016/j.matlet.2005.10.013
3.
J. W. Lee, S. Y. Oh, B. Park, M. S. Oh and S. J. Kim, Korean J. Met. Mater., 58, 610 (2020). 10.3365/KJMM.2020.58.9.610
4.
A. R. Marder, Prog. Mater. Sci., 45, 191 (2000). 10.1016/S0079-6425(98)00006-1
5.
A. Amadeh, B. Pahlevani and S. Heshmati-Manesh, Corros. Sci., 44, 2321 (2002). 10.1016/S0010-938X(02)00043-4
6.
J. Xu, B. Li and X. Mi, Hans J. Chem. Eng. Technol., 6, 71 (2016). 10.12677/HJCET.2016.63009
7.
F. Sjoukes, Anti-Corros. Methods Mater., 37, 12 (1990). 10.1108/eb007267
8.
N. Pistofidis, G. Vourlias, S. Konidaris, E. Pavlidou, G. Stergioudis and D. Tsipas, Cryst. Res. Technol., 41, 759 (2006). 10.1002/crat.200510664
9.
T. H. Cook, Met. Finish., 101, 22 (2003). 10.1016/S0026-0576(03)90187-5
10.
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). 10.1016/j.corsci.2019.108170
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). 10.1007/s12540-015-5411-9
12.
S. Schuerz, M. Fleischanderl, G. H. Luckeneder, K. Preis, T. Haunschmied, G. Mori and A. C. Kneissl, Corros. Sci., 51, 2355 (2009). 10.1016/j.corsci.2009.06.019
13.
A. Du, Y. Huo and J. Hu, Adv. Mater. Res., 433, 111 (2012). 10.4028/www.scientific.net/AMR.433-440.111
14.
M. Manna, Surf. Coat. Technol., 205, 3716 (2011). 10.1016/j.surfcoat.2011.01.026
15.
T. Liu, R. Ma, Y. Fan, A. Du, X. Zhao, M. Wen and X. Cao, Surf. Coat. Technol., 337, 270 (2018). 10.1016/j.surfcoat.2018.01.032
16.
L. A. Rocha and M. A. Barbosa, Corrosion, 47, 536 (1991). 10.5006/1.3585290
17.
M. Saternus and H. Kania, Materials., 14, 1259 (2021). 10.3390/ma1405125933800931PMC7961903
18.
ASTM international. Standard Practice for Operating Salt Spray (Fog) Apparatus. Products & Services. Retrieved December 17, 2021 from https://www.astm.org/b0117-19.html .
19.
C. E. Jordan and A. R. Marder, J. Mater. Sci., 32, 5593 (1997). 10.1023/A:1018680625668
20.
D. Kopycinski and E. Guzik, Solid State Phenom., 197, 77 (2013). 10.4028/www.scientific.net/SSP.197.77
21.
R. F. Lynch, J. Met., 8, 39 (1987).
22.
L. Chen, R. Fourmentin and J. R. Mcdermid, Metall. Mater. Trans. A., 39, 2128 (2008). 10.1007/s11661-008-9552-z
23.
T. Harada, Bull. Chem. Soc. Jpn., 10, 379 (1935). 10.1246/bcsj.10.379
24.
P. Maass, P. Peissker, Handbook of Hot-dip Galvanization, p.29-90, Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim (2011). 10.1002/9783527636884.ch3
25.
H. Asgari, M. R. Toroghinejad and M. A. Golozar, Curr. Appl. Phys., 9, 59 (2009). 10.1016/j.cap.2007.10.090
26.
R. Krieg, A. Vimalanandan and M. Rohwerder, J. Electrochem. Soc., 161, C156 (2014). 10.1149/2.103403jes
27.
E. Diler, B. Rouvellou, S. Rioual, B. Lescop, G. Nguyen Vien, D. Thierry, Corros. Sci., 87, 111 (2014). 10.1016/j.corsci.2014.06.017
28.
M. Dutta, A. K. Halder and S. B. Singh, Surf. Coat. Technol., 205, 2578 (2010). 10.1016/j.surfcoat.2010.10.006
29.
N. C. Hosking, M. A. Strom, P. H. Shipway and C. D. Rudd, Corros. Sci., 49, 3669 (2007). 10.1016/j.corsci.2007.03.032
Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 31
  • No :12
  • Pages :704-709
  • Received Date : 2021-11-03
  • Revised Date : 2021-12-09
  • Accepted Date : 2021-12-10
  • DOI :https://doi.org/10.3740/MRSK.2021.31.12.704
Journal Informaiton Korean Journal of Materials Research Korean Journal of Materials Research
Online Submission
  • scopus
  • NRF
  • KOFST
  • crossref crossmark
  • crossref cited-by
  • crosscheck
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close