Corrosion Resistance of Aluminum Coatings Deposited by Warm Spraying on AZ91E Magnesium Alloy

Ura‐Bińczyk, Ewa; Morończyk, Bartosz; Katayama, Seiji; Araki, Hiroshi; Jaroszewicz, Jakub; Molak, Rafał M.

doi:10.5006/3025

Cited by 3 publications

(3 citation statements)

References 48 publications

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“…Meanwhile, µCT studies performed in the material volume render these kinds of preparation effects negligible. As such, µCT analysis was used to measure the total porosity and pore distribution throughout the entire sample, not only the surface, as demonstrated in our previous studies regarding Al [ 36 ] and Ti [ 37 ] coatings. However, the µCT is limited by resolution and studied area size, both of which are lower than image analysis.…”

Section: Resultsmentioning

confidence: 99%

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A Comparative Study of Aluminium and Titanium Warm Sprayed Coatings on AZ91E Magnesium Alloy

et al. 2022

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Aluminium (Al) and titanium (Ti) coatings were applied on AZ91E magnesium alloy using a low-pressure warm spray (WS) method. The deposition was completed using three different nitrogen flow rates (NFR) for both coatings. NFR effects on coating microstructure and other physical properties were systematically studied. Microstructural characterization was performed using scanning electron microscopy (SEM), and the porosity was estimated using two methods—image analysis and X-ray microtomography. The coating adhesion strength, wear resistance, and hardness were examined. The protective properties of the coatings were verified via a salt spray test. Decreasing NFR during coating deposition produced more dense and compact coatings. However, these conditions increased the oxidation of the powder. Al coatings showed lower hardness and wear resistance than Ti coatings, although they are more suitable for corrosion protection due to their low porosity and high compactness.

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Section: Resultsmentioning

confidence: 99%

“…Due to the limited availability of the WS systems, few investigations study corrosion protection of coatings produced by this method. Among them are those published by the authors and relating to Al [ 36 ] and Ti [ 37 ] coatings produced by WS. A relationship between porosity, oxygen content, and NFR was revealed for Ti coatings.…”

Section: Resultsmentioning

confidence: 99%

A Comparative Study of Aluminium and Titanium Warm Sprayed Coatings on AZ91E Magnesium Alloy

et al. 2022

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“…They examined coated and uncoated samples for variable loads in load control mode and stated that the fatigue strength of the coated sample increased by 25% in 10 million cycles. Ura‐Bińczyk et al [ 10 ] in their study, AZ91E coated the magnesium alloy with a hot spraying method and measured the corrosion resistance in 3.5 wt.% NaCl solution. They also performed hot spraying at different nitrogen flow rates and examined their effects.…”

Section: Introductionmentioning

confidence: 99%

Improvement of corrosion and stress corrosion properties of magnesium alloys by coating aluminum with the electric arc spray method

Çatar

Altun

2022

Materials & Corrosion

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In this study, corrosion and stress corrosion behaviors of AZ31, AZ61, and AZ91 magnesium alloys coated with aluminum by the electric arc spray method were investigated in 3.5 wt.% NaCl solution. Structural properties of coated materials were investigated by scanning electron microscopy (SEM), energy dispersive X‐ray analysis, and X‐ray diffraction. Electrochemical properties were determined using the potentiodynamic polarization method in 3.5 wt.% NaCl solution. Potentiodynamic polarization curves showed that corrosion current density values did not change with coating in aluminum‐coated samples by the electric arc spray method. In contrast, corrosion potential value increased toward positive values. Slow strain rate test (SSRT) was used to determine the stress corrosion behavior and stress corrosion indexes (ISCC), ultimate tensile strength (UTS), and elongation of AZ31, AZ61, and AZ91 magnesium (Mg) alloys were determined. As a result of the SSRT, the aluminum coating process decreased significantly the stress corrosion indexes of AZ31, AZ61, and AZ91 Mg alloys. The fracture of surface images was also examined in the SEM, and both intergranular and transgranular stress corrosion cracking were observed in all three alloys.

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Corrosion behaviour OF HVOF deposited Zn–Ni–Cu and Zn–Ni–Cu–TiB₂ coatings on mild steel

Ali

Ahmad

2022

Corrosion Reviews

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In this study, Zn–Ni–Cu and Zn–Ni–Cu–TiB2 coatings were deposited using high-velocity oxy-fuel (HVOF) thermal spray technique on a mild steel substrate. Corrosion tests like neutral salt spray (NSS) following (ASTM B-117) standard and immersion cycle test following ASTM G-31, ASTM G1-03, standards were carried out for Zn–Ni–Cu and Zn–Ni–Cu–TiB2 coated mild steel along with uncoated mild steel acting as a control. Both Zn–Ni–Cu and Zn–Ni–Cu–TiB2 coated mild steel were corrosion resistant as compared to uncoated mild steel. Raman analysis following the immersion cycle test inferred that uncoated mild steel had all forms of rust. While Zn–Ni–Cu and Zn–Ni–Cu–TiB2 coated mild steel developed very little rust. The characterization helped to understand the changes in the surface before and after tests. It was observed that both Zn–Ni–Cu and Zn–Ni–Cu–TiB2 coated mild steel had little corrosion degradation of surface as compared to uncoated mild steel. Suggesting that both coatings performed significantly better compared to uncoated mild steel in corrosive environments. Polarization and EIS tests of both coated and uncoated mild steel in a 3.5% NaCl medium helped to understand the behaviour of coatings over a range of frequencies. Both coated samples had high polarization potential E corr values and lower polarization current I corr values as compared to uncoated mild steel. Inferring better performance of coatings in corrosive environments as compared to uncoated mild steel.

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Corrosion Resistance of Aluminum Coatings Deposited by Warm Spraying on AZ91E Magnesium Alloy

Cited by 3 publications

References 48 publications

A Comparative Study of Aluminium and Titanium Warm Sprayed Coatings on AZ91E Magnesium Alloy

A Comparative Study of Aluminium and Titanium Warm Sprayed Coatings on AZ91E Magnesium Alloy

Improvement of corrosion and stress corrosion properties of magnesium alloys by coating aluminum with the electric arc spray method

Corrosion behaviour OF HVOF deposited Zn–Ni–Cu and Zn–Ni–Cu–TiB₂ coatings on mild steel

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Corrosion Resistance of Aluminum Coatings Deposited by Warm Spraying on AZ91E Magnesium Alloy

Cited by 3 publications

References 48 publications

A Comparative Study of Aluminium and Titanium Warm Sprayed Coatings on AZ91E Magnesium Alloy

A Comparative Study of Aluminium and Titanium Warm Sprayed Coatings on AZ91E Magnesium Alloy

Improvement of corrosion and stress corrosion properties of magnesium alloys by coating aluminum with the electric arc spray method

Corrosion behaviour OF HVOF deposited Zn–Ni–Cu and Zn–Ni–Cu–TiB2 coatings on mild steel

Contact Info

Product

Resources

About

Corrosion behaviour OF HVOF deposited Zn–Ni–Cu and Zn–Ni–Cu–TiB₂ coatings on mild steel