Influence of alloyed magnesium on the microstructure and long-term corrosion behavior of hot-dip Al–Zn–Si coating in NaCl solution

Liu, Wei; Li, Moucheng; Luo, Qun; Fan, Hongzhen; Zhang, Jieyu; Hu-sheng, LU; Chou, Kuo‐Chih; Wang, Xun-Li; Li, Qian

doi:10.1016/j.corsci.2015.12.014

Cited by 84 publications

(18 citation statements)

References 52 publications

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“…The Fe4Al13 phase is a barshaped phase and found in 55AZS and 23AZS alloys, the τ6 phase is needle-like shaped and appears in the 23AZS-1.5Mg alloy, and τ5 and Mg2Si phases re polygon-shaped and present in the 23AZS-3Mg alloy. In the results of Liu et al [36], the Mg2Si phase is found in the dendrites of the 55Al-Zn-2Mg (wt %) coating and the shape of this phase is similar to our result. It can be concluded that the number of bottom dross particles in 55AZS alloy is obviously more than that in the 23AZS alloy from Figure 12.…”

Section: Microstructure and Phase Composition Of Drosssupporting

confidence: 92%

The Evaluation on Corrosion Resistance and Dross Formation of Zn–23 wt % Al–0.3 wt % Si–x wt % Mg Alloy

Peng

Lü

et al. 2019

Coatings

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: A comparative study of the corrosive resistance and dross formation of 55Al–Zn–1.6Si (wt%) (55AZS) and 23Al–Zn–0.3Si–xMg (wt%) (23AZS–xMg, x = 0, 1.5, 3) alloys are performed using immersion corrosion and dross formation test, respectively. The result of immersion corrosion testing shows that corrosive rate of the 23AZS alloy is lower than that of 55AZS alloy in the latter stage of immersion and 23AZS–1.5Mg alloy shows the optimal corrosive resistance compared to other alloys relatively. The result of dross formation test shows that the number of bottom dross particle formed in 23AZS–xMg (x = 0, 1.5, 3) alloy is less than that in 55AZS alloy. Moreover, the thermodynamic calculation is performed to reveal the solubility of Fe in the alloys, the result shows the solubility of Fe reduces as a decrease of Al content in the alloy, and the number of dross particle (Fe4Al13 and 6 (Al9Fe2Si2) phase) generated in 23AZS alloy is more than that in 55AZS alloy. In general, 23AZS–1.5Mg alloy has an advantage of less dross and a certain corrosion resistance and it is expected to be applied for the hot stamping process of coating.

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Section: Microstructure and Phase Composition Of Drosssupporting

confidence: 92%

The Evaluation on Corrosion Resistance and Dross Formation of Zn–23 wt % Al–0.3 wt % Si–x wt % Mg Alloy

Peng

Lü

et al. 2019

Coatings

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“…− 1.050 ± 0.010 V) toward less negative values during the exposure, with the most pronounced potential change exhibited by the air-knifed hot-dip Zn-coated steel electrode, recorded at a somewhat acidic pH value of 4. Nevertheless, for the all samples, the corrosion potential remained within the range that provided cathodic protection to iron substrate through dissolution of Zn(Magnelis®) coating [10][11][12][13].…”

Section: Resultsmentioning

confidence: 99%

“…Hence, the Tafel-recorded j cor values are qualitatively in-line with those derided based on the linear polarization measurements in Table 5. On the other hand, values of anodic Tafel coefficient (Table 7) are generally lower than the cathodic ones, thus indicating that the corrosion process is controlled by the cathodic oxygen depolarization reaction [10,17,18].…”

Section: Electrochemical Corrosion Characteristics Of Zn(magnelis®)-cmentioning

confidence: 95%

On the Corrosion Performance of Module-Mounting Assemblies for Ground-Mounted Photovoltaic Power Station

Pierożyński

Bialy²

2017

Electrocatalysis

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The present paper reports the corrosion performance results of construction materials employed for the manufacture of mounting assemblies for ground-mounted photovoltaic (PV) power stations. For this purpose, the corrosion behavior of industrial hot-dip Zn-coated steel sheets was compared with that of Magnelis® type steel coating. Experiments involved samples in continuous exposure in 3 wt% NaCl solution along with regular assessment of their corrosion parameters by means of major (impedance spectroscopy, linear and Tafel polarization plots) electrochemical techniques. Analyses of surface/cross-sectional morphology and elemental compositions of metal-coated samples were carried out by means of SEM and EDX spectroscopy techniques.

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“…For TCP treated samples, the value of B TCP is different from that of the pre-treated sample (B 0 ), and its value will not change much for TCCs under other film-forming periods. In this paper, defined B 0 and B TCP as a constant based on the calculated results, i.e., 19 and 22 mV respectively, and the approximate values of current density of Zn55Al samples in 0.5 M NaCl solution were calculated by Equation ( 4) [47]. The polarization resistance (R p ), corrosion potential (E corr ), corrosion current density (i corr ) from Figure 8 are summarized in Table 1.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

Influence of Treatment Time on Performance of Cr(III)-Based Conversion Coatings on Hot Dip Zn–55Al–1.6Si Coated Steel Sheet

Pan

Tang

2019

Coatings

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In this work, the effect of treatment time on the performance of Cr(III) conversion coatings (TCC) on hot dip Zn–55Al–1.6Si (Zn55Al) coated steel sheet were investigated. The surface 3D morphology and roughness of TCCs were examined by a 3D topography instrument and the structure, chemical composition, and elemental depth distribution were studied by means of scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and auger electron spectroscopy (AES). The results indicated that during the formation of TCC, the macro-roughness of Zn55Al surface was reduced, but the micro-roughness increased, which are considered to be key factors in enhancing the adhesion strength of epoxy primers. The AES depth profiles showed a two-layer TCC for both dendritic and inter-dendritic regions and chemical composition analysis of XPS showed that the surface of TCC was mainly oxides, fluoride and a small number of hydroxides. Overall, Zn55Al specimen prepared in a diluted commercial Cr(III)-based solution for 180 s at 40 °C performed a better adhesion strength to epoxy primer and had the largest polarization resistance among all TCCs in this work. Additionally, longer Cr(III) passivation process (TCP) treatment time will increase the sensitivity of the TCC to micro-cracks.

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Influence of alloyed magnesium on the microstructure and long-term corrosion behavior of hot-dip Al–Zn–Si coating in NaCl solution

Cited by 84 publications

References 52 publications

The Evaluation on Corrosion Resistance and Dross Formation of Zn–23 wt % Al–0.3 wt % Si–x wt % Mg Alloy

The Evaluation on Corrosion Resistance and Dross Formation of Zn–23 wt % Al–0.3 wt % Si–x wt % Mg Alloy

On the Corrosion Performance of Module-Mounting Assemblies for Ground-Mounted Photovoltaic Power Station

Influence of Treatment Time on Performance of Cr(III)-Based Conversion Coatings on Hot Dip Zn–55Al–1.6Si Coated Steel Sheet

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