Characterization of the FeAl intermetallic layer formed at Fe Zn interface of a hot-dip galvanized coating containing 5 wt.% Al

2020 ◽  
Vol 396 ◽  
pp. 125969
Author(s):  
K.-K. Wang ◽  
C.-W. Hsu ◽  
L. Chang ◽  
W.J. Cheng
Keyword(s):  
Intermetallic Layer ◽  
Galvanized Coating

scholarly journals Application of Bonded Joints for Quantitative Analysis of Adhesion

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
Jarmila Trpčevská ◽  
Mária Kollárová ◽  
Eva Zdravecká ◽  
Jana Tkáčová
Keyword(s):  
Steel Substrate ◽  
Zinc Coating ◽  
Experimental Tests ◽  
Coated Steel ◽  
Bonded Joints ◽  
Steel Sheets ◽  
Galvanized Coating ◽  
Zinc Coatings ◽  
Peel Tests

The performance of hot-dip coated steel sheets is associated with properties of the zinc coatings on steel substrate. For the characterization of the adhesion behaviour of zinc coating on steel various tests were employed. The study was focused on quantification assessment of galvanized coating adhesion to substrates. Methods for evaluation of the bonding strength of zinc coating by the shear strength and the T-peel tests applying four special types of adhesives were used. The experimental tests of bonded joints show that the adhesion of the zinc coating to the substrate was higher than that of the applied adhesive with the highest strength.

The effect of the intermetallic layer on the adherence of a hot-dip galvanized coating

1985 ◽  
Vol 19 (2) ◽  
pp. 211-214 ◽  
Author(s):  
S.J. Mäkimattila ◽  
E.O. Ristolainen ◽  
M. Sulonen ◽  
V.K. Lindroos
Keyword(s):  
Intermetallic Layer ◽  
Galvanized Coating

Characterization of hot-dip galvanized coating on dual phase steels

2011 ◽  
Vol 205 (11) ◽  
pp. 3535-3539 ◽  
Author(s):  
Huachu Liu ◽  
Fang Li ◽  
Wen Shi ◽  
Rendong Liu ◽  
Lin Li
Keyword(s):  
Dual Phase ◽  
Dual Phase Steels ◽  
Galvanized Coating

Microstructural characterization of a Cr2Nb-Nb(Cr) microlaminate composite

1994 ◽  
Vol 52 ◽  
pp. 706-707
Author(s):  
M. Larsen ◽  
R. G. Rowe ◽  
D. W. Skelly
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Metal Layer ◽  
Intermetallic Layer ◽  
Weight Ratio ◽  
Microstructural Characterization ◽  
Aircraft Engine ◽  
Intrinsic Defect ◽  
Lamellar Thickness

The thrust to weight ratio of an aircraft engine is limited by the density and elevated temperature performance of high temperature structural materials. Many material systems are currently under investigation as potential next generation engine materials. Microlaminate composites consisting of alternating layers of a ductile refractory metal for toughening and a high temperature intermetallic compound for elevated temperature strength have applicability in aircraft engine turbines. The lamellar thickness of such a composite must be small because the intrinsic defect size, a crack across the intermetallic layer, will be controlled by the intermetallic layer thickness. The microstructural characterization of a Cr2Nb-Nb(Cr) microlaminate composite produced by Magnetron® sputtering was carried out by cross-sectional TEM. Both the as-deposited composite and one heat treated at 1200°C for two hours were examined.Figure 1 shows a micrograph of the as-deposited composite. The metal and intermetallic layers are 2um thick. The metal layer has a composition in atomic percent of 95% Nb and 5% Cr.

scholarly journals Influence of Fe-Zn intermetallic layer on corrosion behaviour of galvanized concrete reinforcement

2016 ◽  
Vol 60 (3) ◽  
pp. 91-100
Author(s):  
P. Pokorný
Keyword(s):  
State Of The Art ◽  
Corrosion Behaviour ◽  
Intermetallic Layer ◽  
Point Of View ◽  
External Factors ◽  
Galvanized Steel ◽  
External Layer ◽  
Current Point ◽  
Galvanized Coating ◽  
Intermetallic Layers

Abstract The article summarizes state of the art of the influence of external layer of Fe-Zn intermetallics on corrosion behaviour of galvanized steel in a fresh, hardened and chloride contaminated concrete. Current point of view on formation, composition and crystallography of particular intermetallic Fe-Zn phases, that are present in hot dip galvanized coating. External factors as alloying elements are involved as well. A corrosion resistance of these intermetallic layers (especially ζ-FeZn13) during exposure in concrete is evaluated finally.

Characterization of Intermetallic Layer with Nanoresolution Using X-Ray Standing Wave Technique

2009 ◽  
Vol 289-292 ◽  
pp. 369-375
Author(s):  
Csaba Cserháti ◽  
Z. Erdélyi ◽  
Z. Balogh ◽  
Lajos Daróczi ◽  
A. Csik ◽  
...  
Keyword(s):  
Standing Wave ◽  
Intermetallic Layer ◽  
Intermetallic Phase ◽  
Depth Profiling ◽  
Phase Growth ◽  
X Ray ◽  
Wave Technique ◽  
X Ray Absorption ◽  
Kinetics Of

X-ray standing wave technique has been used to measure the kinetics of CoSi intermetallic phase growth in a-Si/Co/a-Si sandwich structure. The a-Si/Co/a-Si arrangement were placed into a waveguide structure formed by two Ta films. X-ray fluorescence and extended X-ray absorption fine structure analysis has been used in a combination with X-ray standing wave technique for depth profiling with sub-nanometer resolution of specimens annealed at 493K for different annealing time. The position and the thickness of the growing CoSi intermetallic phase have been monitored.

scholarly journals Hot-Dip Aluminizing of Low Carbon Steel Using Al-7Si-2Cu Alloy Baths

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Prashanth Huilgol ◽  
Suma Bhat ◽  
K. Udaya Bhat
Keyword(s):  
Carbon Steel ◽  
Intermetallic Layer ◽  
Low Carbon Steel ◽  
Base Material ◽  
Intermetallic Phases ◽  
Average Thickness ◽  
Low Carbon ◽  
Parabolic Relationship ◽  
Dipping Time

Hot-dip aluminizing of low carbon steel was done in molten Al-7Si-2Cu bath at 690°C for dipping time ranging from 300 to 2400 seconds. Characterization of the intermetallics layer was done by using scanning electron microscope with energy dispersive spectroscopy. Four intermetallic phases, τ5-Al7Fe2Si, θ-FeAl3, η-Fe2Al5, and τ1-Al2Fe3Si3, were identified in the reaction layer. τ5- Al7Fe2Si phase was observed adjacent to aluminum-silicon topcoat, θ-FeAl3 between τ5 and η-Fe2Al5, η-Fe2Al5 adjacent to base material, and τ1-Al2Fe3Si3 precipitates within Fe2Al5 layer. The average thickness of Fe2Al5 layer increased linearly with square root of dipping time, while for the rest of the layers such relationship was not observed. The tongue-like morphology of Fe2Al5 layer was more pronounced at higher dipping time. Overall intermetallic layer thickness was following parabolic relationship with dipping time.

scholarly journals Characterization of Coatings on Grey Cast Iron Fabricated by Hot-dipping in Pure Al, AlSi11 and AlTi5 Alloys

2014 ◽  
Vol 14 (1) ◽  
pp. 85-90 ◽  
Author(s):  
R. Mola ◽  
T. Bucki ◽  
K. Wcisło
Keyword(s):  
Cast Iron ◽  
Outer Layer ◽  
Intermetallic Layer ◽  
Optical Microscope ◽  
Pure Aluminium ◽  
Bath Composition ◽  
Graphite Cast Iron ◽  
Flake Graphite Cast Iron ◽  
Grey Cast

Abstract Flake graphite cast iron was hot-dip coated with pure aluminium or aluminium alloys (AlSi11 and AlTi5). The study aimed at determining the influence of bath composition on the thickness, microstructure and phase composition of the coatings. The analysis was conducted by means of an optical microscope and a scanning electron microscope with an EDS spectrometer. It was found that the overall thickness of a coating was greatly dependent on the chemical composition of a bath. The coatings consisted of an outer layer and an inner intermetallic layer, the latter with two zones and dispersed graphite. In all the cases considered, the zone in the inner intermetallic layer adjacent to the cast iron substrate contained the Al5Fe2 phase with small amount of silicon; the interface between this phase and the cast iron substrate differed substantially, depending on the bath composition. In the coatings produced by hot-dipping in pure aluminium the zone adjacent to the outer layer had a composition similar to that produced from an AlTi5 bath, the Al3Fe phase was identified in this zone. The Al3Fe also contained silicon but its amount was lower than that in the Al5Fe2. In the coatings produced by hot-dipping in AlSi11, the zone adjacent to the outer layer contained the Al3FeSi phase. The analysis results showed that when AlSi11 alloy was applied, the growth mode of the inner layer changed from inwards to outwards. The interface between the Al5Fe2 phase and the cast iron substrate was flat and the zone of this phase was very thin. Locally, there were deep penetrations of the Al5FeSi phase into the outer layer, and the interface between this phase and the outer layer was irregular. Immersion in an AlTi5 bath caused that the inner intermetallic layer was thicker than when pure aluminium or AlSi11 alloy baths were used; also, some porosity was observed in this layer; and finally, the interface between the inner layer and the cast iron substrate was the most irregular

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