Microstructure and initial corrosion behavior of double-layer Zn-Al-Mg coatings produced by PVD

Ye, Chengtong; Xu, Gaoxiang; Wang, Fangfang; Wang, Xinchao; Hu, Zhang

doi:10.1016/j.surfcoat.2019.03.029

Cited by 14 publications

(6 citation statements)

References 41 publications

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“…In addition, the Nyquist diagram obtained for pure Zn immersed in SIF presents a linear region at low frequency, which is related to diffusion impedance. Thus, the equivalent circuit (Figure h) with Warburg impedance is applied to fit SIF. , Obviously, there is a medium-frequency capacitive circle and low-frequency inductive circle in SGF. Figure f shows the equivalent circuit for the sample immersion in SGF. , R L and L refer to the inductive resistance and inductance describing the inductance loop at low frequencies.…”

Section: Resultsmentioning

confidence: 99%

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Influence of Enzymes on the In Vitro Degradation Behavior of Pure Zn in Simulated Gastric and Intestinal Fluids

et al. 2022

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Zinc (Zn) alloys are being developed as the degradable biomaterial. However, the corrosion mechanism of Zn in the gastrointestinal environment is seldom investigated and needs to be addressed. In this study, the impacts of enzymes on the degradation of pure Zn via electrochemical measurements and immersion were investigated. Pepsin and pancreatin affected the degradation of pure Zn. In contrast with the solutions without enzymes, the degradation rates declined with the addition of enzymes in solutions. However, localized corrosion was observed because the adsorption of pepsin was not a perfect barrier to prevent corrosion. The adsorbed pancreatin protected the samples from corrosion mainly at the initial stage of immersion. With immersion in the simulated intestinal fluid, adsorption and desorption of pancreatin occurred simultaneously on the sample surface. These findings allow the development of Zn alloy-implanted devices for the digestive tract as well as the understanding of the Zn corrosion mechanism in the gastrointestinal environment.

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Section: Resultsmentioning

confidence: 99%

“…Thus, the equivalent circuit ( Figure 8 h) with Warburg impedance is applied to fit SIF. 27 , 64 Obviously, there is a medium-frequency capacitive circle and low-frequency inductive circle in SGF. Figure 8 f shows the equivalent circuit for the sample immersion in SGF.…”

Section: Resultsmentioning

confidence: 99%

Influence of Enzymes on the In Vitro Degradation Behavior of Pure Zn in Simulated Gastric and Intestinal Fluids

et al. 2022

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“…It appeared in the linear zone at the low frequencies and was associated with diffusion impedance. They were adapted using the equivalent circuit with Warburg impedance [40,58,64]. Table 3 displays the corresponding parameters.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

Corrosion Mechanisms of a Biodegradable Zn-0.4Li Alloy in Simulated Gastrointestinal Environment

et al. 2023

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Zn-Li alloys have been demonstrated to be potential biodegradable materials because of their favorable biocompatibility and exceptional strength. The corrosion behaviors of Zn–0.4Li in simulated gastric fluid (SGF) and simulated intestinal fluid (SIF) were investigated. Compared with samples in SIF, those in SGF were severely corroded locally. Pepsin and pancreatin participated in the formation of degradation products. After immersion in SGF and SIF, the corrosion process presented two interfaces. Lithium (Li) preferentially reacted in the near-surface region to form a Li-rich region. Simultaneously, there were two Li-poor regions around the Li-rich region. Then Zn-rich products gradually became dominant with time. Li+ releasement dominated over Zn2+ releasement throughout the immersion process in SGF and SIF. These results can guide the development of biodegradable gastrointestinal anastomotic nails in the future.

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“…Additionally, it is preferred over stainless steel in structures requiring mass installation due to its superior cost effectiveness [3]. Among them, zinc (Zn)-aluminum (Al)-magnesium (Mg) alloy coated steel plates are known to have excellent corrosion resistance, even in marine environments, and are reported to have various advantages [4][5][6][7][8]. Based on these advantages, numerous studies are currently underway.…”

Section: Introductionmentioning

confidence: 99%

Self-Healing Phenomenon at the Cut Edge of Zn-Al-Mg Alloy Coated Steel in Chloride Environments

Kim,

Jin,

Yang

et al. 2024

Coatings

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This study explores the self-healing phenomenon at the cut edges of Zn-Al-Mg alloy coated steel in chloride environments, a critical consideration for materials exposed to marine conditions. Zn-Al-Mg coatings offer superior resistance to cut-edge corrosion. This research aims to unravel the self-healing properties observed in these coatings. Through cyclic corrosion tests (CCTs), we compared the corrosion resistance of Zn-Al-Mg coated steel with traditional zinc alloy coatings. Our findings show a notable reduction in corrosion with ZMA4 coatings after 120 CCT cycles. This is due to the formation of corrosion products, namely layered double hydroxides (LDHs) and Mg(OH)2. X-ray diffraction and X-ray photoelectron spectroscopy analyses were employed to confirm the presence of these products and elucidate their roles in the self-healing process. This study highlights the potential of Zn-Al-Mg coatings for enhancing the durability of steel structures in corrosive environments, suggesting a paradigm shift in corrosion protection strategies for marine applications. The development of coatings that exhibit self-healing capabilities in chloride-rich environments could significantly mitigate the challenges posed by cut-edge corrosion, promising extended service life and reduced maintenance costs.

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Microstructure and initial corrosion behavior of double-layer Zn-Al-Mg coatings produced by PVD

Cited by 14 publications

References 41 publications

Influence of Enzymes on the In Vitro Degradation Behavior of Pure Zn in Simulated Gastric and Intestinal Fluids

Influence of Enzymes on the In Vitro Degradation Behavior of Pure Zn in Simulated Gastric and Intestinal Fluids

Corrosion Mechanisms of a Biodegradable Zn-0.4Li Alloy in Simulated Gastrointestinal Environment

Self-Healing Phenomenon at the Cut Edge of Zn-Al-Mg Alloy Coated Steel in Chloride Environments

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