Primary Applications of Magnesium Alloys 

Magnesium alloys are increasingly used in architectural structural engineering due to their unique properties.

There are several examples of buildings using magnesium alloys around the world, such as the Shanghai Tower, the new research building at the University of Miami, and the stage at Koshigaya Minami Elementary School in Koshigaya, Japan. These structures demonstrate the effectiveness of magnesium alloys in enhancing the performance and appearance of buildings.

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One area where magnesium alloys are very effective is in building curtain wall materials. We provide custom-made architectural curtain wall structural elements that offer several advantages over traditional materials. Magnesium alloy curtain wall is light in weight, anti-oxidation, easy to process and shape, and has good heat insulation performance.

Magnesium alloys are also well suited for building structural components such as columns and beams. Compared with traditional steel structures, magnesium alloy structural parts are stronger and stronger, but also lighter in weight. This reduces the weight of the building, making it more earthquake-resistant.

Our company also customizes and supplies magnesium alloy roofing materials, such as roof tiles. These materials are corrosion resistant, lightweight, resistant to oxidation, and provide good thermal insulation. This makes them durable and comfortable to use in building roofs.

Magnesium alloys are also used in high-rise buckling supports, such as shock-absorbing supports, which can effectively reduce the deformation and displacement of structures during earthquakes. The seismic response of buildings can be significantly improved by using buckling-confined braces of magnesium alloys.

Wall panels: Magnesium alloy wall panels have properties such as fire prevention, heat insulation, and heat preservation, and can replace traditional building materials such as bricks and concrete, making buildings lighter, stronger and more durable.

Protective facilities: Magnesium alloy protective facilities, such as explosion-proof doors, bulletproof glass, fire doors, etc., have the characteristics of light weight, high strength, and fire prevention, and can provide effective security.

Decorative materials: Magnesium alloy decorative materials, such as magnesium alloy ceilings, magnesium alloy wall decoration panels, etc., have the characteristics of lightness, environmental protection, and fire resistance, and can create more beautiful and practical interior decoration effects.

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Magnesium alloy has the characteristics of good biocompatibility and degradability, and is gradually being applied to the manufacture of medical devices, such as implanted stents, screws, and other orthopedic and dental implants.

Implanted stent: Magnesium alloy implanted stent is a kind of absorbable vascular stent, which can support and stabilize blood vessels, and can be absorbed by the body after vascular treatment is completed, without the need for surgical removal. This stent material can gradually degrade and be absorbed by the human body, reducing the risks associated with long-term implantation in the body.

Screws: Magnesium alloy screws are absorbable implants used in orthopedic surgery. They have mechanical properties similar to human tissue and can promote bone healing. After treatment, these screws can be absorbed by the body, avoiding the need for surgical removal.

Other implants: Magnesium alloy can also be used to manufacture other implants, such as dental implants, bone nails, etc. The materials and techniques used in the manufacturing of these implants are aimed at making them absorbable and degradable by the human body, minimizing their impact on the body.

Due to the low melting point, good thermal conductivity, and strong liquid flowability of magnesium alloys, they can be used for 3D printing to manufacture lightweight, high-strength, and complex-shaped parts.

Automotive manufacturing: 3D printing can be used to manufacture lightweight magnesium alloy parts, such as body structure components, engine components, brake systems, etc., which can improve the performance and safety of automobiles.

Medical devices: 3D printing technology can be used to manufacture magnesium alloy orthopedic implants, stents and other medical devices. These implants can be absorbed and degraded by the human body, avoiding the need for artificial removal surgery.

Electronic products: 3D printing can be used to manufacture high-performance magnesium alloy heat sinks, battery boxes, and other electronic product components, which can improve the performance and lifespan of electronic products.

Magnesium alloy, with its lightweight and high strength, is an ideal material for manufacturing high-end sports equipment such as bicycles, golf clubs, and skateboards.

Bicycles: Magnesium alloy can be used to manufacture bicycle components such as frames and wheels, which have the characteristics of lightweight and high strength, improving the speed and stability of bicycles.

Golf clubs: Magnesium alloy can be used to manufacture golf club components such as shafts and heads, which have the characteristics of lightweight and high strength, improving the swing speed and stability of golf clubs.

Skiing equipment: Magnesium alloy can be used to manufacture skiing equipment such as ski bases and snow surfaces, which have the characteristics of lightweight, high strength, and corrosion resistance, improving the speed and durability of skiing equipment.

Fitness equipment: Magnesium alloy can be used to manufacture fitness equipment such as dumbbells and exercise bikes, which have the characteristics of lightweight and high strength, improving the comfort and durability of fitness equipment.

Magnesium alloys can be used as hydrogen storage materials, with high hydrogen storage capacity and good safety, which can play an important role in the field of hydrogen energy.

Magnesium-based solid-state hydrogen storage technology is an emerging method for the storage and transportation of hydrogen gas. This approach addresses the high costs and energy consumption associated with traditional high-pressure gas and low-temperature liquid hydrogen storage. Compared to conventional methods, solid-state hydrogen storage offers enhanced safety, economic viability, and storage capacity. The core concept of this technology lies in the formation of magnesium hydride through the reaction of magnesium with hydrogen, enabling efficient hydrogen storage at ambient temperature and pressure, with a significantly higher hydrogen storage density than gaseous and liquid forms.

However, this technology faces several challenges, such as heat generation and expansion during hydrogen storage. Research teams are continuously optimizing performance through material modification and innovative thermal management strategies to progressively address these issues. Solid-state hydrogen storage holds the potential to revolutionize long-distance transportation, energy surplus storage, and household energy supply, thereby accelerating the adoption and application of hydrogen energy.

Magnesium alloys are good thermal conductors and can be used to manufacture efficient heat exchangers, liquid coolers, and heat sinks, among other things.

Fuel Cells: Magnesium alloys can be used as cathode materials in fuel cells to improve their efficiency and stability.

Solar Panels: Using magnesium alloys to manufacture solar panels provides lightweight, high strength, and corrosion resistance, which can improve the performance and lifespan of the solar panels.

Lithium-ion Batteries: Magnesium alloys can be used as negative electrode materials in lithium-ion batteries, with high specific energy and low cost, which can improve the energy density and safety performance of lithium-ion batteries.

Magnesium alloys are extensively used in LED lighting fixtures:

Weight Reduction: The lightweight nature of magnesium alloys reduces the overall weight of the fixtures.

Stability: High strength properties ensure stability during the fixture's usage.

Heat Dissipation: Magnesium alloys' excellent thermal conductivity effectively dissipates heat, thus extending the lifespan of the lighting fixtures. Pure magnesium has a thermal conductivity of 158W/(m·K) at room temperature, while Mg-Zn and Mg-Mn alloy series exhibit thermal conductivity ranging from 110 to 140W/(m·K), offering superior overall heat dissipation performance compared to aluminum alloys.

Components in the LED lighting industry that employ magnesium alloys include streetlight casings and frames, tube light profiles, cylinder light casings, bulb light casings, tunnel light casings, and LED heat dissipation modules. 

These components are manufactured using magnesium alloy die-castings and profiles, with surface treatments such as fluorocarbon spraying, powder coating, and anodizing.

Magnesium alloys find application in rail transit vehicles through castings and extruded profiles.

In Japan, high-performance flame-retardant magnesium alloys with a flash point of 1200℃ were used in the trial production of lightweight magnesium alloy high-speed train body structures. These structures, composed of extruded profiles and rolled magnesium alloys, achieved about a 30% weight reduction compared to aluminum structures.

In France, magnesium alloy castings were applied on seats of double-decker high-speed trains, including small tabletops, armrests, footboards, and side panels. Compared to aluminum alloys, the weight of each double-seat was reduced from 36kg to 30kg.

In South Korea, the seat bases of KTX high-speed trains used magnesium alloy sheet components, reducing the weight of each seat by 5kg compared to aluminum-glass fiber-reinforced plastic structures.

China has developed interior parts, transition couplers, luggage racks, seat frames, and vehicle profiles utilizing magnesium alloys for rail transit vehicles.

Magnesium alloys find extensive applications in the 3C (Computer, Communication, Consumer electronics) industry. They are commonly used in various 3C products:

Laptops: Magnesium alloys are utilized for manufacturing the outer casing and base of laptops.

Smartphones: They are also frequently used for producing the outer shells of smartphones.

Tablets: Magnesium alloys are employed in manufacturing the bodies of tablets.

Utilizing magnesium alloy die-casting or extruded sheets processed through CNC machining for 3C product casings ensures outstanding mechanical performance and visual quality.

Aircraft: They are commonly used in manufacturing aircraft bodies and other structural components.

Other 3C products that incorporate magnesium alloys include projectors, digital cameras, network communication devices, audio-visual equipment, among others.

Magnesium alloys, known for their excellent mechanical properties, damping characteristics, electromagnetic shielding, and thermal conductivity, have found extensive use in the civil aviation sector.

Their civil aviation applications primarily lie in the civil aircraft domain. Magnesium alloys and magnesium-based composite materials have gradually and successfully been employed in civil aircraft components, showing rapid advancements.

Civil aircraft components such as cabin interior parts, aircraft auxiliary structures, avionics enclosures, instrument panels, lightweight brackets, passenger seat frames, luggage compartments, and various thin-walled plate components emphasize the pursuit of lightness, corrosion resistance, and energy efficiency. These requirements underscore the advantages of magnesium alloys in civil aviation applications.

Magnesium alloys find versatile applications in electric bicycles:

Frame: Magnesium alloy frames make the bike lighter while enhancing stability.

Motor Mounts: The excellent thermal conductivity of magnesium alloys facilitates quicker heat dissipation from motors, reducing failure rates.

Wheels: Magnesium alloy characteristics ensure wheel stability, reducing vibrations during rides and improving overall comfort.

Handlebars: High strength and lightweight properties of magnesium alloys ensure handlebar stability, enhancing control flexibility.

Other Components: Including frame supports, front forks, rear suspensions, among others.

Magnesium alloys not only offer good shock absorption and high comfort but also provide efficient heat dissipation, lowering brake system temperatures and extending brake hub lifespans. Lighter magnesium alloy hubs further contribute to improving acceleration and braking performance.

The application of magnesium alloy hubs significantly increases the use of magnesium in individual bicycles.

The development and application of magnesium alloy automotive components have seen rapid growth in recent years.

Magnesium alloys possess excellent characteristics such as high strength and low density, making them ideal for automotive parts to achieve lightweight designs, improve fuel efficiency, and enhance safety performance. They are used to replace traditional aluminum alloys or steel in manufacturing car components like wheel hubs and frames.

With its excellent thermal conductivity, magnesium alloys effectively reduce engine heat loss, thus improving fuel efficiency. They are utilized in manufacturing engine oil pans, valve covers, exhaust pipes, and other parts.

Magnesium alloys exhibit good impact resistance and bending properties, enhancing the collision absorption capability when applied in automotive safety components. They're used in making door frames, wheel suspensions, as well as protective components like body shields and impact plates.

Mechanical Properties

Magnesium and its alloys exhibit high specific strength and stiffness. The specific strength of pure magnesium is 133 GPa/(g/cm3), while the Young's modulus of magnesium and its alloys (approximately 45 GPa) is closer to the elastic modulus of human bone (20 GPa), effectively reducing stress shielding effects. The density of magnesium and its alloys (approximately 1.7 g/cm3) is similar to the density of human bone (1.75 g/cm3), meeting the requirements of ideal bone plates.

Biocompatibility

Toxicity tests have shown that immersion solutions of magnesium alloys exhibit no cytotoxicity and do not significantly reduce the viability of fibroblast cells and osteoblast cells. Compared to pure magnesium, magnesium alloy has a lower hemolysis rate and fewer adhered platelets, making it suitable for applications in bone and vascular implant materials by appropriately adding alloying elements.

Biodegradability

Magnesium-based alloys can corrode and degrade in the physiological environment of the human body. Compared to other types of degradable materials, magnesium alloys exhibit significantly higher toughness and better processing performance. Due to the presence of chloride ions in bodily fluids, magnesium elements degrade more rapidly in chloride ion solutions, thus demonstrating biodegradability within the biological system. Additionally, experiments have shown that heat treatment can alter the degradation rate of magnesium alloys in the body. Generally, heat treatment reduces the tendency for galvanic corrosion compared to as-cast and wrought states, resulting in a slower degradation rate.

Applications of Biomaterial Magnesium Alloys

Cardiovascular Stents: Clinical use of degradable cardiovascular stents made from magnesium has been reported.

Bone Fixation Materials: Magnesium alloy bone fixation materials, as a new type of medical material, can replace traditional materials such as steel nails, matching the mechanical properties of human bone more closely and avoiding the pain of secondary surgery to remove steel nails after degradation.

Dental Implant Materials: The elastic modulus of magnesium and magnesium alloys is closer to that of human cortical bone than other metal materials, making them better suited as dental implant materials with improved biomechanical compatibility. Magnesium ions can promote the attachment of bone cells.

Neural Repair: Biomedical magnesium alloys can be used in the field of neural repair to manufacture neural repair scaffolds and implants, promoting nerve regeneration and repair, with potential applications in the treatment of nervous system injuries such as spinal cord injuries.

Drug Delivery Systems: Biomedical magnesium alloys can also be used as carriers for drug delivery systems, achieving targeted and sustained drug release by controlling the degradation rate and drug release rate of the alloy, such as drug delivery systems for localized tumor treatment.

Food Utensils: Magnesium alloys with nutritional elements can be used to make food utensils.

Pure Magnesium Eco-friendly Laundry: Granular magnesium reacts with water to generate weakly alkaline hydrogen-rich water containing Mg2+ and OH- ions, exhibiting strong antibacterial and deodorizing capabilities, with excellent cleaning effects.

Advancements in Modification Techniques for Biomedical Magnesium Alloys

The greatest obstacle to the application of magnesium alloys as medical materials lies in their rapid corrosion rate and the large amount of gas generated during degradation, which can cause inflammation in the body. To enable magnesium and magnesium alloys to replace titanium and other biomedical materials, modification is necessary.

Purification of Magnesium Alloys: Impurity elements in magnesium alloys act as cathodic phases in the body, promoting the formation of micro-galvanic cells and accelerating the electrochemical corrosion of the matrix. Although purifying magnesium alloys can effectively slow down their degradation, the reduction in fixed phases often leads to a decrease in mechanical properties.

Alloying of Magnesium Alloys: The corrosion resistance of magnesium can also be improved by alloying. The development of new biodegradable magnesium alloys can alleviate degradation by selecting nutritional elements as alloying elements, such as introducing beneficial elements like Ca, which not only alleviates the degradation of magnesium alloys but also promotes bone growth.

Heat Treatment of Magnesium Alloys: Heat treatment can change the microstructure of magnesium alloys. Impurity elements and inclusions fully diffuse and dissolve into the grain interior, resulting in a homogeneous structure that effectively reduces the probability of galvanic corrosion.

Surface Treatment of Magnesium Alloys: Surface treatment can maintain the material's matrix structure, thereby effectively maintaining its mechanical properties. Therefore, surface treatment is widely used in the modification of biomedical magnesium alloys to improve their biocompatibility and corrosion resistance.

Surface treatment methods for biomedical magnesium alloys include chemical conversion treatment, micro-arc oxidation, organic coatings, metal ion implantation coatings, sol-gel methods, and electrochemical deposition methods.

Prospects for Development

As a new generation of metal biomaterials, magnesium and magnesium alloys have many unparalleled advantages. With the gradual deepening and systematization of research, magnesium and magnesium alloys will undoubtedly be widely applied in the field of biomaterials in the future. 

1、Applicability of Magnesium Alloys in Robot Manufacturing Due to Their Superior Properties
Magnesium alloys, with a density only two-thirds that of aluminum, are among the lightest structural materials available today [1]. This lightweight characteristic can significantly reduce the weight of robots, thereby enhancing energy efficiency. Furthermore, magnesium alloys exhibit excellent shock resistance, which helps minimize vibrations during robot operation [2].

2、Applications of Magnesium Alloys in Robotic Structural Components
Robotic structural components require high strength and lightweight materials. Magnesium alloys, known for their high specific strength and excellent casting properties, are often used to manufacture robotic arms and frameworks [3]. For example, industrial robots that incorporate magnesium alloy arms achieve enhanced mobility and flexibility without compromising mechanical strength [4]. Additionally, magnesium alloys are widely utilized for making robot structures such as bodies, arms, legs, and joints due to their lightweight and high strength. These features improve the robot's maneuverability and energy efficiency [5, 6].

3、Applications of Magnesium Alloys in Joint Components
Robot joint components demand materials with high machining precision and excellent wear resistance. Magnesium alloys, with their low melting point and ease of machining, are ideal for fabricating complex joint components [7]. Moreover, surface treatments such as anodizing or coating can enhance the corrosion resistance of magnesium alloys, extending the lifespan of these components [8].

4、Applications in Power Transmission System Components
Magnesium alloys are suitable for manufacturing power transmission system components in robots, such as gears, shafts, and couplings. The lightweight nature of these parts contributes to faster response times and improved dynamic performance of the robots [5, 6].

5、Applications of Magnesium Alloys in Robot Casings
Robot casings must combine lightweight characteristics with aesthetic appeal and protective capabilities. Magnesium alloys, with their superior forming capabilities, enable the design of more complex and ergonomic shapes. Additionally, magnesium alloy casings provide excellent electromagnetic shielding, making them ideal for smart robots and medical robots [9]. Their thermal conductivity and electromagnetic shielding properties also make magnesium alloys suitable for electronic enclosures in robots, such as controllers, sensors, and battery housings [5, 6].

6、Other Applications
Beyond the applications mentioned above, magnesium alloys can also be used to manufacture other robotic components, such as actuators, sensors, and connectors [5, 6].

7、Limitations and Improvement Directions of Magnesium Alloys
Despite the many advantages of magnesium alloys in robot manufacturing, their poor corrosion resistance limits their use in certain environments [10]. Enhancing corrosion resistance and mechanical properties through the addition of rare earth elements or the development of novel magnesium alloys can address these issues [11]. Research on composite preparation techniques involving magnesium alloys and other materials can further improve their performance. Investigations into the behavior of magnesium alloys in extreme environments can also expand their application scope. Additionally, advanced processing techniques such as semi-solid forming and 3D printing are driving further advancements in the use of magnesium alloys in robotics [12

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【2】Friedrich, H., & Schumann, S. (2001). Research for a “new age of magnesium” in the automotive industry. Journal of Materials Processing Technology, 117(3), 276-281.

【3】 Luo, A. A. (2004). Magnesium casting technology for structural applications. Journal of Magnesium and Alloys, 2(2), 49-59.

【4】Zeng, R. C., et al. (2010). Corrosion of magnesium alloy: The influence of alloying. Journal of Materials Science & Technology, 26(8), 801-818.

【5】 Kun-ming Zhang, Chen Qin, Jia She, Xue-rui Jing, Peng, Ai-tao Tang, Muhammad Rashad, Fu-sheng Pan. Simultaneous Improvement in Strength and Ductility of Extruded Mg Alloy Via Novel Closed Forging Extrusion. Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China. 2022.

【6】Mojtaba Sadeghi Gogheri, Masoud Kasiri-Asgarani, Hamid Reza Bakhsheshi-Rad, Hamid Ghayour, Mahdi Rafiei. Mechanical Properties, Corrosion Behavior and Biocompatibility of Orthopedic Pure Titanium−magnesium Alloy Screw Prepared by Friction Welding. Islamic Azad Univ, Adv Mat Res Ctr, Dept Mat Engn, Najafabad Branch, Najafabad, Iran. 2020.

【7】Wang, J., et al. (2017). Lightweight design for robotic arms based on magnesium alloy material. Advanced Materials Research, 1290, 25-30.

【8】Mendis, C. L., et al. (2008). Formation of a protective surface layer on Mg-Al-Zn alloy. Corrosion Science, 50(12), 3435-3441.

【9】Gray, J. E., & Luan, B. (2002). Protective coatings on magnesium and its alloys—a critical review. Journal of Alloys and Compounds, 336(1-2), 88-113.

【10】Song, G., & Atrens, A. (2003). Understanding magnesium corrosion—a framework for improved alloy performance. Advanced Engineering Materials, 5(12), 837-858.

【11】Easton, M. A., et al. (2008). Development of magnesium alloys for high-temperature applications. Metallurgical and Materials Transactions A, 39(6), 1399-1408.

【12】Zhang, W., et al. (2016). 3D printing of magnesium alloys for applications in robotics. Additive Manufacturing, 12, 200-210.