Comparison of corrosion behaviour of heat treated, ZrO2 and ZrN PVD coated AZ91D Mg alloy

Kumaradhas, P.; Sivapragash, M.

doi:10.1016/j.matpr.2022.02.181

Cited by 8 publications

(5 citation statements)

References 11 publications

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“…n n 0 (10) The geometric interpretation of the Taylor formula involves approximating the original function using a polynomial function. Because the polynomial function can be differentiated at any point, it is easy to calculate and convenient for finding extreme values and determining the nature of functions.…”

Section: Regression Analysismentioning

confidence: 99%

“…Magnesium (Mg) alloys have attracted extensive attention due to their low density and good mechanical properties. − However, the poor corrosion resistance of magnesium alloys tremendously hinders their widespread application . To improve the corrosion resistance of magnesium alloys, surface treatment methods are usually used to build protective coatings on the surfaces of magnesium alloys, for instance, heat treatment, chemical conversion coatings, anodic oxide coatings, electroplating coating, electroless coating, vapor deposition, etc. Among these, chemical conversion coating has attracted worldwide attention due to its simple preparation process and its ability to handle workpieces with complex shapes. , The layered double hydroxide (LDH) film in chemical conversion films is favored by researchers due to its simple preparation process, environmental protection, and good corrosion resistance. , …”

Section: Introductionmentioning

confidence: 99%

“… 1 − 3 However, the poor corrosion resistance of magnesium alloys tremendously hinders their widespread application. 4 To improve the corrosion resistance of magnesium alloys, surface treatment methods are usually used to build protective coatings on the surfaces of magnesium alloys, for instance, heat treatment, 5 chemical conversion coatings, 6 anodic oxide coatings, 7 electroplating coating, 8 electroless coating, 9 vapor deposition, 10 etc. Among these, chemical conversion coating has attracted worldwide attention due to its simple preparation process and its ability to handle workpieces with complex shapes.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimization of Mg–Al Layered Double Hydroxide Film Preparation and Corrosion Resistance Study on AZ91D Mg Alloy by Multivariate Polynomial Regression Fitting

Wang,

Liu,

Wei

et al. 2024

ACS Omega

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Layered double hydroxide (LDH) films have received extensive attention for their unique physical barrier function and ion exchange properties, which make them promising candidates for corrosion protection of magnesium alloys. In this paper, we used the multiple polynomial regression fitting method to establish a regression equation for the electrochemical corrosion resistance with the reaction temperature (T), pH, and reaction time (t) of the Mg−Al LDH film on the AZ91D magnesium alloy. The goodness of fit, confidence, and residual analyses confirmed the high accuracy of the model equation. According to the calculation using the fmincon function, the best corrosion resistance of the prepared samples could be achieved when the parameters are T = 135 °C, pH = 12.0, and t = 15 h. Then, the experimental results showed that the corrosion current density (I corr ) of the obtained LDH film under the above conditions could be 1.07 × 10 −7 A/cm 2 , approximately 3 orders of magnitude lower than the magnesium alloy substrate, after immersion in a 3.5 wt % NaCl solution for 180 h, the surface structure of the LDH film did not change significantly, and the I corr was still 2 orders of magnitude higher than that of the magnesium alloy substrate. Hence, a synergistic effect equation for the reaction temperature, pH, and reaction time on the corrosion resistance of the LDH film on a magnesium alloy surface prepared by the hydrothermal method was obtained. Moreover, using this equation, we obtained an LDH film with good corrosion resistance and durability, providing theoretical guidance for optimizing the process of preparing the LDH film by the hydrothermal method in practical applications.

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Section: Regression Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimization of Mg–Al Layered Double Hydroxide Film Preparation and Corrosion Resistance Study on AZ91D Mg Alloy by Multivariate Polynomial Regression Fitting

Wang,

Liu,

Wei

et al. 2024

ACS Omega

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“…One such method is physical vapor deposition (PVD) that involves thermal or physical vaporization of metal atoms from a target surface and depositing over a substrate. PVD coatings have been for developing corrosion resistant coatings on Mg alloys [10,11]. Aluminum (Al) and silicon (Si) are common alloying elements for magnesium alloys but are shown to increase electrochemical activity of the alloy that decreases its corrosion resistance due to galvanic coupling between the alloying elements and Mg [12,13].…”

Section: Introductionmentioning

confidence: 99%

Influence of Annealing Temperature on the Chemical Composition of Composite Al-Si Coating Deposited via Magnetron Sputtering on ZK60A

Singh,

Glizde,

Savkovs

2024

Engineering Headway

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In this paper, the effect of heat treatment temperature on the resultant composition of composite Al-Si coatings on ZK60A alloy investigated. The coatings were developed using magnetron sputtering deposition. These coatings can serve as an effective anti-corrosion barrier for Mg alloys in aqueous mediums. The magnetron target composition was 80% Al and 20% Si, while in the deposited coating it was 78% Al and 18% Si, with the rest being atoms from the substrate. The as-deposited coatings had pores and the Al-Si composite was deposited in the form of globules. The sputtered coatings were subjected to heat treatment for 1.5 hours at 420 °C (HT1) and 350 °C (HT2). The ratio of elements in the heat-treated coatings changed significantly due to diffusion between substrate-coating interface and migration through the pores that exist in the coating. It was found that Mg migrates into the coating and Si into the substrate. Al/Mg ratio reduced by 81.2 and 60.6 %, respectively, in the coating after the HT1 and HT2.

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“…Its hardness and wear resistance are worse than other stainless steels. As a result, 316L stainless steel parts are prone to wear failure during service [4][5][6], causing significant economic losses to enterprises. For example, the minor damage of engine parts for aviation equipment is very serious, but the cost of replacing these critical parts is very high.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Properties of Inconel 718 Coatings with Different Laser Powers on the Surface of 316L Stainless Steel Substrate

Liu,

Zhu,

et al. 2023

Coatings

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Laser cladding is a new method to prepare coatings with good quality. Laser power is one of the main factors affecting the quality of laser cladding coatings. An appropriate laser power helps obtain a high-performance laser cladding coating. In order to obtain coatings with good quality, an experiment with different laser powers was designed in this research. Three Inconel 718 coatings with different laser powers were prepared on the surface of a 316L stainless steel substrate. And the effect of different laser powers (1400, 1600, and 1800 W) on the microstructure, phases, and element distribution of coatings (L1–L3) was investigated by SEM, EDS, XRD, and a wear and friction tester. Meanwhile, the microhardness and friction and wear properties of different coatings were analyzed. The results show that the coatings’ phases were the same and composed of γ~(Fe, Ni) solid solution, Ni3Nb, (Nb0.03Ti0.97)Ni3, MCX (M = Cr, Nb, Mo), and so on. The background zones in the L1–L3 coatings were mainly the Fe and Ni elements. The irregular blocks in the coating were rich in Cr, Mo, and Nb, which formed the MCX (M = Cr, Nb, Mo) phase. When laser powers were 1400, 1600, and 1800 W, the average microhardness of the three coatings was 685.6, 604.6, and 551.9 HV0.2, respectively. The L1 coating had the maximum microhardness, 707.5 HV0.2, because the MCX (M = Cr, Nb, Mo)-reinforced phase appeared on the upper part of the coating. The wear rates were 3.65 × 10−5, 2.97 × 10−5, and 6.98 × 10−5 mm3·n−1·m−1. The wear mechanism of the three coatings was abrasive wear and adhesive wear. When the laser power was 1600 W, the coating had the minimum wear rate, which exhibited the best wear resistance. When the laser power was 1600 W, the upper part of the coating to the bonding zone was mainly composed of equiaxed crystals, dendrites, cellular crystals, columnar crystals, and planar crystals. The fine crystals and compounds caused a decrease in wear volume, and they had the most optimal wear resistance.

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Comparison of corrosion behaviour of heat treated, ZrO2 and ZrN PVD coated AZ91D Mg alloy

Cited by 8 publications

References 11 publications

Optimization of Mg–Al Layered Double Hydroxide Film Preparation and Corrosion Resistance Study on AZ91D Mg Alloy by Multivariate Polynomial Regression Fitting

Optimization of Mg–Al Layered Double Hydroxide Film Preparation and Corrosion Resistance Study on AZ91D Mg Alloy by Multivariate Polynomial Regression Fitting

Influence of Annealing Temperature on the Chemical Composition of Composite Al-Si Coating Deposited via Magnetron Sputtering on ZK60A

Microstructure and Properties of Inconel 718 Coatings with Different Laser Powers on the Surface of 316L Stainless Steel Substrate

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