The anti-corrosion of flange needle valves mainly uses materials such as stainless steel and carbon steel. Although there is a wealth of information on corrosion prevention, it is not easy to choose the appropriate one because the issue of corrosion is very complex. The difficulty in selecting valve body materials lies not only in considering corrosion issues, but also in considering factors such as pressure and temperature resistance, economic feasibility, and ease of purchase.

Secondly, lining measures should be taken, such as lining with lead, aluminum, engineering plastics, natural rubber, and various synthetic rubbers. If the media conditions permit, this is actually a cost-effective method.

Again, in situations where pressure and temperature are not high, using non-metallic materials as the main body of valves can often effectively prevent corrosion.

In addition, the surface of the needle valve body is also subject to atmospheric corrosion, and steel materials are generally protected by painting.