Reactive wetting of high Mn steels during continuous hot-dip galvanizing

Alibeigi, S.; Kavitha, R.; Meguerian, R.J.; McDermid, Joseph R.

doi:10.1016/j.actamat.2011.02.027

Cited by 70 publications

(20 citation statements)

References 19 publications

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“…Nevertheless, a dense and compact corrosion interface comprising orientated Fe 2 B and a columnar z-FeZn 13 compound can form, and this in turn increases the corrosion product adherence, thus greatly suppressing the interface spallation. The work of adhesion between intermetallics (such as at the FeZn 13 /Fe 2 Al 5 interface) is naturally lower than that of the interface/steel interface, and element segregation may somewhat improve the adhesion owing to the wetting interface [2,3,18,20,44]. However, the present interface under such large PRB values can well adhere to the substrate, which is attributed to the orientation-pinning effect on the interface.…”

Section: Effect Of Fe 2 B Orientation On Corrosion Interface Microstrmentioning

confidence: 74%

Effect of orientation and lamellar spacing of Fe2B on interfaces and corrosion behavior of Fe-B alloy in hot-dip galvanization

Xing

et al. 2016

Acta Materialia

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a b s t r a c t The effects of orientation and lamellar spacing on the interface microstructure and corrosion behavior of a directionally solidified (DS) Fe-B alloy in a hot-dip galvanization bath were investigated. The results indicated that the microstructure of the DS Fe-B alloy consisted of oriented a-Fe and Fe 2 B grains. The oriented Fe 2 B with [002] preferred growth orientation displayed low-angle grain boundaries on the Fe 2 B (001) basal plane. The DS Fe-B alloy with Fe 2 B vertical to the corrosion interface possessed the best corrosion resistance to liquid zinc owing to the formation of an interface-pinning multilayer induced by the Fe 2 B orientation. The epitaxially grown columnar z-FeZn 13 products were controlled by the geometric constraint of Fe 2 B grain orientation and size, and a mechanism model that explains the interfacial orientation-pinning behavior is discussed in detail. Transmission electron microscopy (TEM) results revealed that the possible orientation relationships of the oriented Fe 2 B and columnar z-FeZn 13 products are (001) Fe2B //(À402) z-FeZn13 and [002] Fe2B //[110] z-FeZn13 . The corrosion damage of the DS Fe-B alloy with Fe 2 B [002] orientation vertical to the corrosion interface in liquid zinc was governed by the competitive mechanisms of Fe 2 B/FeB transformation and microcrack-spallation resistance, which is proposed as being the result of a multiphase synergistic effect in the micro-structures.

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Section: Effect Of Fe 2 B Orientation On Corrosion Interface Microstrmentioning

confidence: 74%

Effect of orientation and lamellar spacing of Fe2B on interfaces and corrosion behavior of Fe-B alloy in hot-dip galvanization

Xing

et al. 2016

Acta Materialia

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“…Although the presence of oxides on the steel surface could be detrimental to reactive wetting [1,28,29], the TEM micrographs (Figures 3,4, and 6) indicate that a fully developed inhibition layer can still grow on the oxide film. Prabhudev et al [11] reported that nano-islands of oxides present on the surface of the steel do not hinder the formation of the inhibition layer due to the ability of Fe-Al interface layer to grow over the oxides.…”

Section: Discussionmentioning

confidence: 99%

“…Because the affinity between iron (Fe) and Al is much higher than that between Zn and Fe, a thin layer of Fe-Al intermetallic (Fe 2 Al 5 or Fe 2 Al 5-x Zn x ) [1] is developed on the steel substrate surface. The thickness of this interface region falls in the range of ~100 nm [2].…”

Section: Introductionmentioning

confidence: 99%

Transmission electron microscopy characterization of the interfacial structure of a galvanized dual-phase steel

Aslam

Martens

et al. 2016

Materials Characterization

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Site-specific studies were carried out to characterize the interface of a galvanized dual-phase (DP) steel. Focused ion beam (FIB) was used to prepare specimens the interface region (~100 nm thick) between the coating and the substrate. Transmission electron microscopy (TEM), scanning TEM (STEM) and high resolution TEM (HRTEM) were performed to resolve the phases and the structures at the interface between the zinc (Zn) coating and the steel substrate. The STEM and TEM results showed that a continuous manganese oxide (MnO) film with a thickness of ~20 nm was present on the surface of the substrate while no silicon (Si) oxides were resolved. Internal oxide particles were observed as well in the sub-surface region. Despite the presence of the continuous oxide film, a well-developed inhibition layer was observed right on top of the oxide film. The inhibition layer has a thickness of ~100 nm. Possible mechanisms for the growth of the inhibition layer were discussed.

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“…At present, a series of studies on the hot-dip galvanizing and oxidation behavior of medium manganese steel have been investigated, but there are some contradictory experimental results. Alibeigi et al [5] studied the selective oxidation behavior of medium manganese steels with Mn contents of 0.14-5.1 wt.% under different dew points. It was shown that the MnO layer was thickened with the increase of Mn content and the high dew point condition (+5 • C) contributed to improving the wettability by deepening the internal oxidation with the decrease of external oxides.…”

Section: Introductionmentioning

confidence: 99%

Effect of Dew Point and Alloy Composition on Reactive Wetting of Hot Dip Galvanized Medium Manganese Lightweight Steel

Yang

Chen

et al. 2020

Coatings

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For its application development, the medium manganese lightweight steel with 3 wt.% and 10 wt.% Mn contents was galvanized in continuous hot dip galvanizing (HDG) simulator and the process parameters on the production line were adopted. Combined with the experimental analysis and thermodynamic calculation, the effect of dew point and alloy composition on the reactive wetting of the steel was investigated. It was shown that MnO existed as a stable oxide for the medium Mn steel with 5 wt.% Al as long as Mn content exceeded 5.1 wt.%. The galvanizability of the steel with 10 wt.% Mn was deteriorated resulting from the formation of a thick and continuous external MnO layer, which had adverse effects on the wettability. MnO particles in the form of unstable phase can be found at the surface of 3Mn steel galvanized at dew point +10 °C. It distributed sparsely and the reactive wettability can be obtained by “bridging connection”, which mitigated the damage of external oxidation. Moreover, the lower dew point, the less tendency to form external oxide. Although the decrease of dew point to −30 °C had a certain benefit for coating quality, the galvanizing quality of 10Mn steel could not be improved due to the formation of a thick MnO layer. Therefore, the Mn content played a stronger role than dew point on the reactive wetting of hot dip galvanized medium manganese lightweight steel.

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Reactive wetting of high Mn steels during continuous hot-dip galvanizing

Cited by 70 publications

References 19 publications

Effect of orientation and lamellar spacing of Fe2B on interfaces and corrosion behavior of Fe-B alloy in hot-dip galvanization

Effect of orientation and lamellar spacing of Fe2B on interfaces and corrosion behavior of Fe-B alloy in hot-dip galvanization

Transmission electron microscopy characterization of the interfacial structure of a galvanized dual-phase steel

Effect of Dew Point and Alloy Composition on Reactive Wetting of Hot Dip Galvanized Medium Manganese Lightweight Steel

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