Wetting force and contact angle measurements to evaluate the influence of zinc bath metallurgy on the galvanizability of high-manganese-alloyed steel

Blumenau, Marc; Norden, Martin; Friedel, F.; Peters, K.

doi:10.1016/j.surfcoat.2010.07.123

Cited by 24 publications

(4 citation statements)

References 18 publications

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“…The Zn Fe ratio can not be taken directly from the depth profile data because it is known that Zn is most probably preferentially sputtered so that the real Fe concentration is in fact lower than the measured one, as demonstrated before for Mg in Zn [15]. With this knowledge and from comparisons with literature these crystals are now attributed to the FeZn 13 ζ phase [9,13,14]. Additional sputter depth profiles were also performed on other areas (results not shown here) and especially on sputtered Zn droplets no Fe could be found.…”

Section: Aes Depth Profiling On a Zn Crystalmentioning

confidence: 98%

Nanoscale surface analysis on second generation advanced high strength steel after hot dip galvanizing

et al. 2013

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Second generation advanced high strength steel is one promising material of choice for modern automotive structural parts because of its outstanding maximal elongation and tensile strength. Nonetheless there is still a lack of corrosion protection for this material due to the fact that cost efficient hot dip galvanizing cannot be applied. The reason for the insufficient coatability with zinc is found in the segregation of manganese to the surface during annealing and the formation of manganese oxides prior coating. This work analyses the structure and chemical composition of the surface oxides on so called nano-TWIP (twinning induced plasticity) steel on the nanoscopic scale after hot dip galvanizing in a simulator with employed analytical methods comprising scanning Auger electron spectroscopy (SAES), energy dispersive X-ray spectroscopy (EDX), and focused ion beam (FIB) for cross section preparation. By the combination of these methods, it was possible to obtain detailed chemical images serving a better understanding which processes exactly occur on the surface of this novel kind of steel and how to promote in the future for this material system galvanic protection.

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Section: Aes Depth Profiling On a Zn Crystalmentioning

confidence: 98%

Nanoscale surface analysis on second generation advanced high strength steel after hot dip galvanizing

et al. 2013

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“…In the dip galvanizing technique, the parts taken from steel coils in appropriate sizes are shaped first, and then their surfaces are galvanized by immersing them in molten zinc pot (460°C). Coating thicknesses are not a precisely controlled parameter in dip galvanizing technique [4][5][6]. The composition of the material to be coated automatically reaches a certain limit value depending on its geometry and dipping time.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Corrosion Behavior of Hot-Dip Galvanized and Continuous Galvanized Steel

Sığırcık¹,

Yıldırım²,

Tüken

2022

Acta Metall Slovaca

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Five years of outdoor atmospheric corrosion tests of hot dip galvanized steel samples were performed, for products of continuous galvanizing and after fabrication batch galvanizing processes. For the purpose of comparison between corrosion performances of these two different galvanizing process products, an industrial coastal area (Gemlik-Bursa/TURKEY) was chosen for outdoor testing, which fits into C4 type corrosive atmosphere definition, according to ISO 9223. Samples were studied in laboratory with accelerated salt spray exposure test and electrochemical methods. Corrosion products formed on exposed samples and cross section of coatings are analyzed by SEM. Lead is observed to change the corrosion characteristics of the coatings with change in constituents of environments. In saline electrolytes, alloying of lead is found to accelerate corrosion rate. This metal deposits as cluster on top layer of the galvanized coatings and acts as strong cathodes with respect to the zinc and accelerates the corrosion rate. It was determined that differences in dip and continuous galvanization processes cause dramatic differences in the elemental composition, morphology and regional hardness values of coatings. In the comparison of corrosion resistance, lower performance of the dip galvanized coating, although it is much thicker, has been shown due to the differences mentioned above.

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“…This is the selective oxidation of alloying elements [3,4]. Taking DP590 as an example, as a kind of high strength steel, the content of alloying elements such as silicon and manganese is high, these elements are occurrence of selective oxidation in the process of galvanizing, which seriously affect the galvanized steel plate performance, will produce a series of production and processing such as leakage is difficult to eliminate the surface defects, serious even affect the galvanized sheet formability [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Bare Spot Defect on a Hot Dip Galvanized DP Sheet Strip

Zhao

Yao

et al. 2018

MSF

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Bare spots defect of galvanealed (GA) in High Strength Dual Phase (DP) steel strip with 1.5 % Mn contain was studied in detail. The surface morphologies of spot defects before and after partial and complete removal of the Zn layer, as well as the interface between the outermost coating layer and the sheet substrate were analyzed by optical microscope (OM), scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray Photoelectron spectroscopy (XPS), glow discharge optical emission spectrometry (GDOES) and laser scanning confocal microscope(LSCM). It was found that the bare spots defect was composed of a large number of pits with different sizes and depths. There were a lot of Fe - Zn alloy particles distributed in the pits, and many MnO formed on the surface, no effective Fe2Al5 inhibition layer formed. The results showed that the main reasons for the bare spots defect of the GA in High Strength DP steel strip are as follows: a silicon oxide film forms on the substrate during annealing prior to hot dipping because of Mn gathered on the surface of steel strip, thus strip surface wettability with liquid zinc is deteriorated and preventing the formation of the Fe2Al5 inhibition layer during hot dipping. In this paper, the dew point control process is introduced creatively, by increasing the dew point and the hydrogen content in the furnace area, and the bare spot defects on the surface of the high strength duplex steel galvanized sheet are solved.

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Wetting force and contact angle measurements to evaluate the influence of zinc bath metallurgy on the galvanizability of high-manganese-alloyed steel

Cited by 24 publications

References 18 publications

Nanoscale surface analysis on second generation advanced high strength steel after hot dip galvanizing

Nanoscale surface analysis on second generation advanced high strength steel after hot dip galvanizing

Atmospheric Corrosion Behavior of Hot-Dip Galvanized and Continuous Galvanized Steel

Bare Spot Defect on a Hot Dip Galvanized DP Sheet Strip

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