The seamless aluminum tube is a product produced by a double-acting extruder. The advantage of the seamless aluminum tube is that it can withstand a certain pressure inside and can be subjected to secondary processing such as turning outside. The material of seamless aluminum tube is generally divided into 6061-2024-LY12-2A12-7075 and other materials, the above materials are duralumin and super duralumin, this kind of material is generally used in aerospace, and other places that require high hardness. We will introduce the seamless aluminum tube manufacturing process in the next issue.

Aluminum tube is an electronegative metal with active chemical properties. The electrode potential is 0.5~3V, and its standard potential is 1.69V at 20. The potential of 99.99% aluminum tube to calomel reference electrode in 5.3%NaCl+0.3%H2〇 is ( 0.87V+0.01V). Although from a thermodynamic point of view, aluminum is one of the active metals, but in many oxidizing media, water, atmosphere, most neutral solutions, and many weak acid media and strong oxidizing media, aluminum tubes have very high stability . This is because the aluminum tube can form a dense and continuous oxide film on its surface in the above-mentioned medium, and the molar volume of this oxide is about 30% larger than that of aluminum.

You may know that seamless aluminum tubes have anti-oxidation properties, but many friends do not understand its principle. The anti-oxidation properties of seamless aluminum tubes are used to simulate gastric acid to study the in vitro acid resistance of chitosan and aluminum hydroxide mixture particles.