Question 1: Are aluminum products hazardous to human health?
Answer: In general, normal use of aluminum products will not cause significant harm to human health. This is because aluminum is easy to form a dense oxide film in the air, which prevents further oxidation and dissolution of the aluminum inside. However, if excessive aluminum is ingested over a long period of time, it may accumulate in the body and adversely affect the nervous system and bones. For example, long-term use of aluminum cookware to cook acidic foods may increase the leaching of aluminum, so attention should be paid to rational use.
Question 2: How to identify the quality of aluminum alloy?
Answer: It can be identified from several aspects. First of all, observe whether the surface is smooth and whether the color is uniform, and the surface of high-quality aluminum alloy should have no obvious defects and color difference. Secondly, check the hardness and toughness of the material, can be used for simple knocking or bending test to make a preliminary judgment, good quality aluminum alloy has a certain degree of hardness, but also has a good toughness. Further, check the product identification and related certification, formal aluminum alloy products usually have a clear composition identification and quality certification mark.
Question 3: Are aluminum products prone to rust?
Answer: Aluminum products are not easy to rust. Because aluminum in the air and oxygen reaction, will quickly form a dense layer of aluminum oxide film on the surface, this layer of oxide film can prevent oxygen and water from further contact with aluminum, thus playing a protective role, so that it has good corrosion resistance.
Question 4: Can aluminum be welded?
Answer: Aluminum can be welded, but due to its special physical and chemical properties, welding is relatively difficult. It is necessary to use specialized welding methods and welding materials, such as argon arc welding, etc., and strict control of welding process parameters to ensure welding quality.
Question 5: Why are some aluminum products soft and some hard?
Answer: This is because aluminum can be made with other metal elements into different kinds of aluminum alloys. The hardness of pure aluminum is relatively low, but after adding some alloying elements such as magnesium, silicon, copper, etc., its hardness will be significantly improved, so that it can be made into a variety of aluminum alloys with different properties according to different needs, to meet the different requirements of use.
Question 6: What do I need to pay attention to during the use of aluminum products?
Answer: Avoid contact with strong acid, strong alkali and other corrosive substances, so as not to destroy the surface oxide film and accelerate the corrosion of aluminum. When cleaning aluminum products, you should use mild detergents and avoid scraping the surface with sharp objects such as steel wire balls. At the same time, in the use of aluminum cookware, should avoid prolonged holding acidic or alkaline food.
Question 7: What is the recycling value of aluminum?
Answer: Aluminum has a high recycling value. Because the energy consumed in recycling aluminum is only about 5% of the energy consumed in the production of primary aluminum, and the recycled aluminum can be reused in the production of a variety of aluminum products, which has good economic and environmental benefits. At present, the aluminum recycling industry is also growing, for the conservation of resources and protection of the environment are of great significance.
Question 8: What happens to aluminum at high temperatures?
Answer: When aluminum reaches its melting point, it will change from solid to liquid, and when it continues to be heated to a certain temperature, the strength of aluminum will gradually decrease, and its physical and chemical properties will also undergo some changes. For example, the oxidation rate of aluminum will be accelerated at high temperatures, and the activity of chemical reaction with other substances will be enhanced.
Question 9: Why is aluminum less conductive than copper, but still used in wire and cable?
Answer: Although the conductivity of aluminum is only about 60% of copper, but the density of aluminum is only about 1/3 of copper, in the case of conveying the same amount of electricity, the quality of aluminum wire is lighter, the cost is lower, and the oxide film on the surface of the aluminum has a certain degree of insulating properties, taking into account all of these factors, aluminum in the wire and cable industry still has a wide range of applications.
Question 10: How to maintain aluminum furniture?
Answer: Normally, aluminum furniture should avoid contact with sharp objects to prevent the surface from being scratched. Regularly wipe with a clean soft cloth to keep the surface clean. If there are stains on the surface, wipe it with a mild detergent, then rinse it with water and dry it. Avoid prolonged exposure to humid or corrosive environments to extend its service life .
