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    12th International Conference on Zinc & Zinc Alloy Coated Steel Sheet - GALVATECH 2021

    21–23 Jun 2021 Virtual Conference
    Virtuel Conference
    Europe/Vienna timezone
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    Session

    Coating Microstructure Analysis and Steel/Coating Surface Reactivity

    C
    21 Jun 2021, 10:50
    Virtuel Conference

    Virtuel Conference

    Conveners

    Coating Microstructure Analysis and Steel/Coating Surface Reactivity

    • Anirban Chakraborty (ArcelorMittal)

    Presentation materials

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    1. 215. SCANNING KELVIN PROBE TECHNIQUES FOR THE INVESTIGATION OF CORROSION, HYDROGEN UPTAKE AND PERMEATION PROPERTIES OF ZINC ALLOY COATINGS ON STEEL
      Michael Rohwerder (Max-Planck-Institut für Eisenforschung GmbH)
      21/06/2021, 10:50
      Structure and Surface Analysis as well as Defect Characterization
      Oral Presentation

      In the recent years the Kelvin probe technique found a steadily and quickly increasing usage in corrosion research. The main application initially was for through-paint monitoring of corrosion driven delamination. Soon after that, with the development and availability of Scanning Kelvin Probe Microscopy (SKPFM), an Atomic Force Microscopy based Kelvin probe technique, followed the application...

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    2. 112. ON GRAIN BOUNDARY TOPOGRAPHY AND SURFACE REACTIVITY DURING HOT-DIP GALVANISING
      Nils Köpper (Salzgitter Mannesmann Forschung GmbH)
      21/06/2021, 11:10
      Challenges in Galvanizing Advanced High Strength Steels (GI, GA,…)
      Oral Presentation

      Under certain conditions of oxygen shortage and high temperatures as could occur after coiling a hot-rolled strip, alloying elements with high oxygen affinity can diffuse and oxidise preferably along the grain boundaries. This selective internal oxidation can be increased by additional heat induced from phase transformations in the coiled state and depends on steel composition. This diffusion...

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    3. 81. DENDRITIC MORPHOLOGIES OF HOT-DIP GALVANIZED Zn-0.2 WT.% Al COATINGS: EXISTENCE OF THIRD PREFERRED GROWTH DIRECTIONS
      Joo-Youl Huh (Korea University)
      21/06/2021, 11:30
      Structure and Surface Analysis as well as Defect Characterization
      Oral Presentation
      Hot-dip galvanized Zn-rich coatings on steel sheets often exhibit dendritic morphologies formed by the primary Zn phase during solidification. The corrosion resistance and surface quality of the galvanized coatings depend not only on the coating chemistry and grain size, but also on the dendritic morphologies of individual coating grains. Therefore, it is of fundamental importance to...
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    4. 128. MICROSTRUCTURE AND TEXTURE ANALYSIS OF A NEAR-EUTECTIC Zn-Al COATING DEPOSITED ON STEEL BY HOT-DIP GALVANIZING
      Houssem Eddine Chaieb (Mines ParisTech)
      21/06/2021, 11:50
      Structure and Surface Analysis as well as Defect Characterization
      Oral Presentation

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      Houssem Eddine CHAIEB a,*, Vincent MAUREL a, Samuel FOREST a, Kais AMMAR a, Alain KÖSTER a, Franck NOZAHIC b, Joost DE STRYCKER b, Jean-Michel MATAIGNE c

      a Le Centre des Matériaux, MINES ParisTech, 63-65 Rue Henri Auguste Desbruères, 91100 Corbeil-Essonnes, France

      b ArcelorMittal Global R&D; Gent, J.F. Kennedylaan 3, B-9060 Zelzate, Belgium

      c...

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    5. 135. SEGREGATION MECHANISM OF Al-BASED OXIDES ON Zn-0.2MASS%Al HOT-DIP GALVANIZED STEEL SHEETS
      Katsuya Hoshino (JFE Steel Corporation)
      21/06/2021, 12:10
      Structure and Surface Analysis as well as Defect Characterization
      Oral Presentation
      Hot-dip galvanized steel sheets (HDG) are one of the popular automotive materials because it is easier to satisfy both high corrosion resistance and low manufacturing cost due to the ease of controlling the thickness of the Zn coating layer than other Zn based coating. Generally, less than 1 mass% of Al is added to molten Zn bath in the HDG manufacturing process in order to decrease dross and...
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