Was ist Aluminium?

Aluminum is nonmagnetic and an excellent conductor of electricity; it can also be easily shaped into many different forms, providing light reflectance as well as protection from radiation and corrosion resistance.

Aluminum is extracted from the bauxite ore, named for where it was discovered in southern France, and constitutes approximately 8 percent of Earth’s crust.

It is a soft metal

Aluminum (also commonly referred to in North American English) is an element with symbol Al and atomic number 13. Aluminum is a soft, ductile metal that can be cast, machined, and extruded. Due to its corrosion-resistance and light weight, its applications for casting, machineing and extrusion make it well-suited to many uses. Furthermore, its thermal and electrical conductivity make it particularly suitable. Lastly, this nonmagnetic element boasts only one stable isotope.

Aluminum, the second most abundant metal on Earth’s crust, has only recently become commercially produced in significant amounts in commercial quantities. Aluminum can be found across numerous industries that make millions of different products using aluminum – from transportation and building applications where light weight and strength are crucial, to consumer durables such as appliances and cooking utensils. It plays an essential part in global economies as a key economic resource.

Pure aluminum is rarely found in nature and must often be combined with other elements to form alloys that possess specific properties. Common alloying metals include copper, magnesium, manganese, silicon, and tin; these alloys help improve strength as well as add other desirable traits like weldability and machinability.

Aluminum’s low density and stiffness makes it an ideal lightweight metal with outstanding tensile strength and weldability, and is highly ductile; thus making it suitable for shaping into tubing or angles. Aluminum also serves as a good conductor of electricity and heat, with the latter property anodized to resist corrosion; plus its natural reflective nature makes it suitable for lighting applications or mirrors.

Humankind has utilized aluminum compounds for centuries, but it wasn’t until the Industrial Revolution that aluminum became more readily accessible as an element itself. Alumen, made up of potash alum (an aluminum potassium sulfate compound), has long been used as a dye-fixer and medicine; its name originates in Latin alumen (which means alkaline in Latin) is also widely used today for toothpaste and soap production; however excessive concentrations may damage cells and alter membrane function significantly.

It is a strong metal

Aluminum is one of the strongest metals available and boasts an incredible strength-to-weight ratio, as well as good hygiene properties and recycling processes that make it more sustainable solutions. Aluminum also possesses corrosion-resistance and conductivity qualities which makes it popular with kitchen utensils and street lights among other applications.

Aluminium is both soft and ductile, so it can easily be formed into complex structures with relatively minimal effort. Furthermore, its compact surface oxide layer offers protection from corrosion. Furthermore, this tightly bound layer makes aluminum insoluble in water yet stable in air; plus its melting-casting abilities make aluminum an extremely lightweight nontoxic material suitable for many uses.

Though aluminum is generally weaker than steel, it still can withstand considerable force and weight without warping or bending under pressure. Unfortunately, however, its soft nature makes it susceptible to denting, denting dings and scratches more readily than its steel counterpart.

Pure aluminum for commercial applications possesses a tensile strength of 90 MPa and can be strengthened further through cold working. Furthermore, alloying it with elements such as copper, manganese, silicon and iron at specific percentages enhances its ductility further while work hardening makes alloys stronger still.

Aluminum has an atomic number of 13 and ranks third on Earth behind oxygen and silicon in terms of abundance. While never occurring naturally in its metallic form, aluminum’s chemical properties allow it to form compounds such as alum, which is used in water purification systems. Not until 1825 did Danish physicist Hans Christian Orsted successfully produce an impure form by reacting anhydrous aluminium chloride with potassium; later that same year Friedrich Wohler was successful in extracting pure aluminium metal.

It is a light metal

Aluminium is one of the most abundant elements on Earth, occurring naturally in rocks and vegetation across both landmasses and water bodies. Although Aluminum never occurs in its pure state in nature, as it readily combines with oxygen and other elements to form compounds, making this metal very soft, ductile, corrosion-resistant, lightweight, electrically conducting nonferrous metal with one of the highest electrical conductivity ratings available for manufacturing thin sheets and foils.

Aluminum’s light weight and ductility make it a versatile construction material, as it can be utilized in load-bearing and nonload-bearing structures alike. Furthermore, its moldability makes it popularly chosen for airplanes, car bodies, siding & roofing, pots & pans as well as consumer products like pots & pans. Aluminum alloys also can provide unique properties tailored specifically for certain applications.

Aluminum production typically uses the Bayer process, where crushed bauxite rock is crushed and sprayed with water, which removes clay and silica particles before being kiln-dried and mixed with soda ash and crushed lime to form alumina.

Bauxite is an abundant and cost-effective raw material for aluminium production, yet the smelting process requires energy-intensive operations that release greenhouse gases. Therefore, most global smelters are located in countries with abundant electricity; many aluminium smelters have also been constructed on lakeshores so as to capture seawater for use in their processes in order to lower emissions while improving efficiency.

Aluminium is a silvery-white metal in Group 13 of the periodic table, making up one third of Earth’s crust by mass and third most abundant element after oxygen and silicon. Although aluminium occurs naturally as metal in its pure state, its presence often forms minerals like bauxite. Aluminium is one of the three most prevalent nonferrous metals globally and third most abundant element.

It is a corrosion-resistant metal

Aluminium has many desirable characteristics and applications in industry. It’s three times lighter than iron with an increased strength-to-weight ratio while remaining flexible, durable, corrosion resistant, non magnetisable and excellent electrical conductivity properties – not to mention one of the least expensive metals commercially available! Aluminum’s versatility has it being used for containers, cooking utensils, beverage cans, aircraft fuselages and automobile bodies among many other things.

Aluminium metal can corrode when exposed to hostile environments, with hydrogen ions aiding the process by reacting with oxygen molecules to form aluminium oxide. However, this reaction is reversible and the surface will remain stable unless hydrogen concentration in solution exceeds certain threshold levels; at which point crevice corrosion begins and aluminium hydroxide precipitates out of solution and begins corrosion of its own accord – known as crevice corrosion.

Aluminium can be subject to corrosion under various environmental conditions, including acidic, alkaline and chloride solutions. Corrosion usually begins rapidly in crevices or cracks before dissolving into an electrolyte to form water-soluble aluminium hydroxide; this form of corrosion is especially prevalent in marine environments with high chloride concentrations.

Uniform corrosion occurs in products exposed to strong acidic or alkaline environments on an ongoing basis, or when their surfaces are scratched or bruised and expose the underlying material to electrolytes; this type of corrosion often leads to pitting corrosion or exfoliation corrosion (an inter-granular corrosion form).

Aluminum is found abundantly throughout Earth’s crust, yet never appears alone in nature. Instead, it exists combined with other elements as either potassium aluminum sulfate (KAl(SO4)212H2O) or as bauxites; latter are reddish-brown rocks containing mixtures of aluminium hydroxides and oxides mined from the ground and processed using the Bayer process before further refined into pure aluminium for use in various applications.