Specific introduction to seamless aluminum pipe

Seamless aluminum pipe is produced by double action extruder. The advantage of seamless aluminum pipe is that it can bear certain pressure internally and can carry out secondary processing such as turning externally. The raw materials of seamless aluminum pipe are generally divided into 6061-2024-ly12-2a12-7075 and other raw materials.

The above raw materials are hard aluminum and super hard aluminum, which are generally used in aerospace and other places with high hardness requirements. The manufacturing process of seamless aluminum pipe will be introduced to us in the next issue. Aluminum tube is an electronegative metal with vivid chemical properties. Its electric potential is 1.0 5 ~ 3V, the standard potential at 20 is 1 69v, 99.99% aluminum tube at 5.3% NaCl + 0.5 The reference potential of calomel in 3% H 2O is (0.87v + 0.01V).

Although aluminum is one of the vivid metals in terms of thermodynamics, aluminum tubes have high stability in many oxidizing media, water, atmosphere, most neutral solutions and many weak acidic and strong oxidizing media. This is because the aluminum tube can form a fine connected oxide film on its surface in the above medium.

The molar volume of this oxide is about 30% larger than that of aluminum We may know that seamless aluminum tube has oxidation resistance, but many friends do not understand its principle. The oxidation resistance of seamless aluminum tube is to study the acid resistance of chitosan and aluminum hydroxide mixture particles in vitro by imitating gastric acid.