Mechanistic investigation on the influence of coating weights on the corrosion behaviour of hot-dip-galvanised Zn-Mg-Al coatings

被引：0
|
作者：
Malla, A. D. [1 ]
Sullivan, J. H. [1 ]
Penney, D. J. [1 ]
Goldsworthy, M. [1 ]
Britton, D. [1 ]
Williams, G. [1 ]
Goodwin, F. [2 ]
Cardoso, A. P. [3 ]
机构：
[1] Swansea Univ, Dept Mat, Corros & Coatings Grp, Bay Campus,Fabian Way, Swansea SA1 8EN, Wales
[2] Int Zinc Assoc, Durham, NC 27713 USA
[3] Int Zinc Assoc, B-1150 Brussels, Belgium
来源：
NPJ MATERIALS DEGRADATION | 2024年 / 8卷 / 01期
关键词：
COATED STEEL; LOCALIZED CORROSION; OXYGEN REDUCTION; ZINC; PRODUCTS; SURFACE; ELECTROLYTE; MAGNESIUM; MODEL;
D O I：
10.1038/s41529-024-00494-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Time-lapse Microscopy, scanning vibrating electrode technique and potentiodynamic methods were used to study the influence of increasing coating weight (80-310 gm-2) on microstructure, cut-edge and surface corrosion of Zn-Mg-Al coatings in 0.17 M NaCl. Cut-edge corrosion was similar for all coatings due to the oxygen reduction reaction becoming diffusion-limited. A 64% reduction in surface corrosion was observed for high coating weights through increases in eutectic volume fraction. Spatial and temporal corrosion mechanisms were controlled by microstructural morphological differences as coating weight varied. 80 g.m-2 coatings demonstrated lateral anodic spreading potentially reducing coating penetration rates despite their higher surface corrosion rate.
引用
收藏
页数：14
相关论文
共 50 条
  • [41] Estimation of corrosion resistance of Zn-0∼30% Al hot-dip coatings on steel
    Takano, Y
    Takada, K
    Hatano, T
    Nakada, T
    Izeki, T
    Xiao, Y
    Watanabe, R
    Yamashita, M
    MATERIALS SCIENCE RESEARCH INTERNATIONAL, 1998, 4 (01): : 64 - 70
  • [42] Improvement of cracking resistance of hot-dip Zn-Al-Mg coatings by heat treatment
    Xu, Minyun
    Zheng, Zhaoyang
    Han, Dong
    Ma, Ruina
    Du, An
    Fan, Yongzhe
    Zhao, Xue
    Cao, Xiaoming
    MATERIALS TODAY COMMUNICATIONS, 2023, 36
  • [43] Comparison of the nucleation and growth of a phosphate conversion coating on Zn-Al and Zn-Al-Mg coatings under the influence of a corrosion inhibitor film
    Said, Vanessa Husien
    Haakmann, Florian
    Brinkbaeumer, Jessica
    Ulbricht, Mathias
    SURFACE & COATINGS TECHNOLOGY, 2022, 451
  • [44] Effect of Mg on Fe-Al interface structure of hot-dip galvanized Zn-Al-Mg alloy coatings
    Xie, Yiye
    Du, An
    Zhao, Xue
    Ma, Ruina
    Fan, Yongzhe
    Cao, Xiaoming
    SURFACE & COATINGS TECHNOLOGY, 2018, 337 : 313 - 320
  • [45] Influence of calcium on the morphology and corrosion performance of hot-dip Al-Si coatings
    Grandhi, Srinivasulu
    Oh, Min-Suk
    MATERIALS LETTERS, 2023, 353
  • [46] Influence of the pH Value on the Corrosion of Zn-Al-Mg Hot-dip Galvanized Steel Sheets in Chloride Containing Environments
    Einfluss des pH Wertes auf die Korrosion von Zn-Al-Mg feuerverzinkten Stahlbändern in Chlorid enthaltenden Umgebungen
    Keppert, T.A. (tim.keppert@voestalpine.com), 1600, Springer (158): : 355 - 363
  • [47] Orientation Dependence of Cracking in Hot-Dip Zn-Al-Mg Alloy Coatings on a Sheet Steel
    Y. B. Park
    I. G. Kim
    S. G. Kim
    W. T. Kim
    T. C. Kim
    M. S. Oh
    J. S. Kim
    Metallurgical and Materials Transactions A, 2017, 48 : 1013 - 1020
  • [48] Orientation Dependence of Cracking in Hot-Dip Zn-Al-Mg Alloy Coatings on a Sheet Steel
    Park, Y. B.
    Kim, I. G.
    Kim, S. G.
    Kim, W. T.
    Kim, T. C.
    Oh, M. S.
    Kim, J. S.
    METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2017, 48A (03): : 1013 - 1020
  • [49] An Excellent Corrosion-Resistant Al-Si-Mg-Mn Hot-Dip Coating for Steel
    Pradhan, D.
    Mondal, A.
    Chakraborty, A.
    JOM, 2024, 76 (08) : 4207 - 4222
  • [50] The structure of coatings obtained in the Zn-31Al-3Mg bath by the batch hot dip method
    Kania, H.
    TECHNOLOGIES AND PROPERTIES OF MODERN UTILISED MATERIALS (TPMUM 2012), 2012, 35
12345