To ensure optimal operation of the condenser in refrigeration units, manufacturers perform specialized chemical treatments to clean scale, rust, sludge, and provide corrosion protection, restoring a clean metal surface.

1. Close the valves for the cooling water inlet and outlet of the condenser. Use a thermometer tube, pressure gauge tube, or drain pipe to connect to an anti-corrosion pump and a dispensing tank to create a small circulation system for cleaning.

2. First, add an acid pickling corrosion inhibitor. This is a copper-specific corrosion inhibitor that adheres to the inner metal wall of the condenser, preventing the acid from reacting with the metal.

3. Add a solid acid pickling cleaning agent. This agent is used to remove scale, primarily composed of calcium carbonate. It is a complex solid organic acid, white crystalline, non-corrosive to metals, and a weak acid. The amount of cleaning agent used depends on the amount of scale buildup.

4. Add a scale remover (optional). If the scale buildup on the condenser is thick, a scale remover is needed to promote the rapid dissolution of the scale reaction products in water, accelerating the reaction of deeper scale layers. 5. Add a neutralizing and passivating agent to neutralize residual acid after chemical cleaning of the condenser, preventing oxidation of the metal surface and the formation of secondary rust.