Effect of Surface Properties on Corrosion Resistance of ZK60 Mg Alloy Microarc Oxidation Coating

Lee, Jeou-Long; Jian, Shun-Yi; Kuo, K.; You, Jhu-Lin; Lai, Yen-Tze

doi:10.1109/tps.2018.2868838

Cited by 10 publications

(9 citation statements)

References 19 publications

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“…Figure 13 presents the tensile curves measured after immersion in SBF, and the results of the strength, elongation, and toughness are shown in Figure 14 and Figure 15 . After 14 days of immersion, the samples had reached the degradation product deposition stage, becoming more brittle, thereby increasing in strength while decreasing in ductility and toughness [ 28 , 29 , 30 , 31 ]. After 28 days of immersion, the coating had completely degraded, and the corrosion behaviors caused cracks that penetrated the core of the samples, thus, decreasing the tensile properties.…”

Section: Resultsmentioning

confidence: 99%

A Study on the Structure and Biomedical Application Characteristics of Phosphate Coatings on ZKX500 Magnesium Alloys

Huang

Hung

et al. 2022

Bioengineering

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Magnesium-matrix implants can be detected by X-ray, making post-operative monitoring easier. Since the density and mechanical properties of Mg alloys are similar to those of human bones, the stress-shielding effect can be avoided, accelerating the recovery and regeneration of bone tissues. Additionally, Mg biodegradability shields patients from the infection risk and medical financial burden of needing another surgery. However, the major challenge for magnesium-matrix implants is the rapid degradation rate, which necessitates surface treatment. In this study, the ZKX500 Mg alloy was used, and a non-toxic and eco-friendly anodic oxidation method was adopted to improve corrosion resistance. The results indicate that the anodic coating mainly consisted of magnesium phosphate. After anodic oxidation, the specimen surface developed a coating and an ion-exchanged layer that could slow down the degradation and help maintain the mechanical properties. The results of the tensile and impact tests reveal that after being immersed in SBF for 28 days, the anodic oxidation-treated specimens maintained good strength, ductility, and toughness. Anodic coating provides an excellent surface for cell attachment and growth. In the animal experiment, the anodic oxidation-treated magnesium bone screw used had no adverse effect and could support the injured part for at least 3 months.

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Section: Resultsmentioning

confidence: 99%

A Study on the Structure and Biomedical Application Characteristics of Phosphate Coatings on ZKX500 Magnesium Alloys

Huang

Hung

et al. 2022

Bioengineering

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“…Characterization of the MAO-coated ZK60 Mg alloy and the bare ZK60 Mg alloy[45]. forging ahead phase, this study shows an increase in science and engineering activities.…”

mentioning

confidence: 77%

“…Characterization of the MAO-coated ZK60 Mg alloy and the bare ZK60 Mg alloy is shown in Table 4. The properties of the electrical source and properties of the coating are related [45].…”

Section: Variation Of Metal Characteristics Under Differentmentioning

confidence: 99%

Evaluation of Prestrain Annealing Impact on Nanomaterial Sensitization

Suresh¹,

DeepaT.

Natrayan

et al. 2021

Journal of Nanomaterials

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Light metal alloys are extensively used in automotive, aerospace, aircraft, and military sectors since their lightweight leads to reduced energy consumption, increased fuel efficiency, and better environmental protection. In the present situation, nanomaterials are the potential candidate for weight saving in the structural application and can meet stringent government norms. Nanomaterial was heat-treated in the furnace to about a certain temperature and time and then normalized for strengthening. The heat-treated nanomaterial undergoes different forging processes, namely, hot forging and cold forging, using a certain capacity’s hydraulic press. Hence, in this work, an extensive study on the influence of the prestrain annealing, the corrosion rate on differently treated samples, and the effect of sensitization heat treatment on the nanomaterial was done.

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“…As can be seen in Table 3 , there are many possibilities in terms of modifying the energy parameters, but the final effect on the anti-corrosion properties of the coatings is always a result of all system factors, such as voltage, current density, frequency, and duty cycle, and it is hard to determine the effect of an individual variable. For instance, the influence of the application of uni- or bipolar pulses modes on corrosion resistance is ambiguous, as shown in the contradictory results presented in [ 144 , 145 , 146 , 148 ]. Current frequencies tested in the range of 10–2000 Hz exhibit a tendency of corrosion resistance increase with higher frequency values [ 139 , 140 , 142 , 149 ]; however, in one case, the opposite trend was observed [ 143 ].…”

Section: Effect Of Energy Input and Electrolyte Composition On Coatin...mentioning

confidence: 99%

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: Part II—PEO and Anodizing

et al. 2022

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Although hexavalent chromium-based protection systems are effective and their long-term performance is well understood, they can no longer be used due to their proven Cr(VI) toxicity and carcinogenic effect. The search for alternative protection technologies for Mg alloys has been going on for at least a couple of decades. However, surface treatment systems with equivalent efficacies to that of Cr(VI)-based ones have only begun to emerge much more recently. It is still proving challenging to find sufficiently protective replacements for Cr(VI) that do not give rise to safety concerns related to corrosion, especially in terms of fulfilling the requirements of the transportation industry. Additionally, in overcoming these obstacles, the advantages of newly introduced technologies have to include not only health safety but also need to be balanced against their added cost, as well as being environmentally friendly and simple to implement and maintain. Anodizing, especially when carried out above the breakdown potential (technology known as Plasma Electrolytic Oxidation (PEO)) is an electrochemical oxidation process which has been recognized as one of the most effective methods to significantly improve the corrosion resistance of Mg and its alloys by forming a protective ceramic-like layer on their surface that isolates the base material from aggressive environmental agents. Part II of this review summarizes developments in and future outlooks for Mg anodizing, including traditional chromium-based processes and newly developed chromium-free alternatives, such as PEO technology and the use of organic electrolytes. This work provides an overview of processing parameters such as electrolyte composition and additives, voltage/current regimes, and post-treatment sealing strategies that influence the corrosion performance of the coatings. This large variability of the fabrication conditions makes it possible to obtain Cr-free products that meet the industrial requirements for performance, as expected from traditional Cr-based technologies.

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Effect of Surface Properties on Corrosion Resistance of ZK60 Mg Alloy Microarc Oxidation Coating

Cited by 10 publications

References 19 publications

A Study on the Structure and Biomedical Application Characteristics of Phosphate Coatings on ZKX500 Magnesium Alloys

A Study on the Structure and Biomedical Application Characteristics of Phosphate Coatings on ZKX500 Magnesium Alloys

Evaluation of Prestrain Annealing Impact on Nanomaterial Sensitization

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: Part II—PEO and Anodizing

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