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. As the main component of carbon steel pipe is iron, this element is easy to react with water and oxygen in the air to produce iron oxide (rust). This material will be transmitted to the cylinder and production equipment along with compressed air, which will cause cylinder wear and equipment damage and bring unnecessary losses to the user. If the air source is in direct contact with the product, the quality will be reduced, and the impact will be more serious if it is food products.

Even if the filter triplet is adopted, as rust is a solid impurity, it is very easy to adsorb on the filter material, resulting in the short service life of the filter material and the pressure drop. Aluminum alloy pipes have the advantages of good hygiene performance. They are all special polyethylene materials, clean and non-toxic, and can block light and air. Long service life, relatively stable material, adding enough stabilizer to strengthen its anti-aging performance, better than stainless steel elbow.

Regular inspection shall be carried out to keep it clean. After the liquid is transported, it shall be thoroughly washed to reduce the corrosion and leakage of the movable elbow. The wall thickness of each part of the movable elbow shall be optically inspected regularly. When the wall thickness is reduced by 20%, it shall be replaced with a new one. Buy products that meet the standards.