Neutralization And Passivation Treatment Of Shell And Tube Heat Exchanger

Neutralization is to neutralize the acid solution remaining in the equipment after cleaning without corroding the equipment; passivation is to form an electronic conductor film on the metal surface that can inhibit the metal dissolution process, and the dissolution rate of this film itself in the medium is very small.  So that it can keep the anodic dissolution rate of the metal at a very small value. Since several sections of pipelines connected to the plate heat exchanger are used for chemical cleaning without disassembly, the heat transfer sheet is made of stainless steel and does not require neutralization and passivation treatment, but the pipeline is made of steel, and the scale and rust on the surface after cleaning are all Removal reveals the essence of steel, which is in a very lively activated state and is very easy to rust. Therefore, it needs to be neutralized and passivated to prevent secondary rust.