Circulation Passivation
Circulation passivation is a process where passivation solutions are pumped through a closed system. This ensures that hard-to-reach internal surfaces are evenly wetted and protected.
Physical-Chemical Mechanism of Action
Passivation solutions are continuously pumped in a closed loop through piping systems or apparatus. The solution is directed to the surfaces to be protected and reacts there to form a protective layer. This prevents corrosion and increases the service life of the materials.
Metallurgical Relevance & Welding Risks
Loop passivation is especially important in the welding industry to protect metals from corrosion. Missing or insufficient passivation can lead to cracks and losses. It is crucial that the solution is constantly pumped to build up a uniform protective layer.
Shop Practice & Action Instructions
To set up loop passivation successfully, follow these steps:
1. Solution selection: Choose a suitable passivation solution based on the material to be protected.
2. System setup: Set up a closed piping system with pump and fans to keep the solution flowing continuously.
3. Flow regulation: Make sure the solution is pumped continuously and a uniform protective layer builds up.
4. Monitoring: Regularly check the system status and the quality of the passivation solution.