Immersion Pickling
Dip pickling is a chemical process where components are immersed in acid to remove oxides and impurities. This ensures complete cleaning.
Physicochemical Action Mechanism
In dip pickling, parts are immersed in a pickling bath filled with acid. The acid reacts with oxides and impurities on the metal surface, dissolving and removing them.
Metallurgical Relevance & Welding Risks
Incomplete or defective dip pickling can lead to insufficient cleaning. This can cause corrosion, porosity, and poorer weld joints. Additionally, leaving the parts in the pickling bath for too long can lead to over-enrichment of the metal with acid components, which can impair mechanical properties.
Workshop Practice & Action Instructions
To ensure successful dip pickling, follow these steps:
1. Use a suitable acid (e.g., sulfuric acid) and pay attention to the correct concentration.
2. Make sure the pickling bath is well covered to prevent contamination.
3. Dip the parts slowly into the acid and let them soak for a specified time (e.g., 5-10 minutes).
4. Remove the parts carefully from the pickling bath and dry them thoroughly before proceeding with welding.