The aluminum alloy pipeline gas storage tank will inevitably cause rain, air or humid atmospheric corrosion after long-term use or use for many years, which is caused by the action of water, oxygen, acidic pollutants and other substances in the atmosphere. It is a common atmospheric corrosion phenomenon that steel rusts in the atmospheric natural environment. Dry atmospheric corrosion. At this time, there is basically no water vapor in the atmosphere, and ordinary metals form invisible oxide films at room temperature.

The surface of steel is kept glossy. Wet atmospheric corrosion. It refers to the corrosion of metal under the thin film layer invisible to the naked eye. At this time, there is water vapor in the atmosphere. When the water vapor concentration reaches the critical humidity (the critical humidity of iron is 65%, and the critical humidity of copper is close to 10 0%), there is a very thin water film on the metal surface, and uniform corrosion will occur. If there are pollutants such as CO2, H2S and SO2 in the atmosphere, the corrosion will be significantly accelerated. The corrosion of steel under atmospheric conditions is actually electrochemical corrosion under water film conditions.

The aluminum alloy pipeline quick pipeline system will gradually replace the traditional carbon steel and stainless steel pipelines, and deliver clean gas and fluid to the users more cheaply. Aluminum alloy pipes have corrosion resistance, mechanical vibration resistance, strong fire resistance, hot and cold weather change resistance, can adapt to various harsh environments, ensure safe, stable and high-quality clean air is delivered to the use end, and ensure the pipeline surface is clean, effectively ensuring the service life of terminal equipment and the stable quality of products.

Aluminum is a light metal with a small specific gravity, only 1 / 3 of that of iron, and a melting point of 658 ℃. It has good thermal and conductive properties, no magnetism and good plasticity. Because of its poor toughness, soft and easy to deform, aluminum alloy is made by adding manganese, copper, magnesium, silicon and other elements into pure aluminum, which makes it tough and not easy to deform. It has become the most widely used non-ferrous metal structural material in industry.