Preparation and finishing affect the surface in different ways
- Pickling
The treatment removes specified scale or contamination by the controlled chemical process. Protect dimensions and follow the actual material procedure.
- Passivation
The controlled treatment supports the relevant passive surface condition. It is not an unlimited corrosion-resistance guarantee.
- ElectropolishingThis term
Electrochemical removal changes the surface texture and condition. Confirm material, dimensions and the intended finishing duty.
- Delamination
The coating or bonded layer separates at an interface. Inspect adhesion and service exposure rather than surface colour alone.
Cleaning by pickling, chemical passivation, electrochemical polishing and failure between layers must be distinguished. A smoother appearance does not prove every surface requirement.
Conceptual material surfaces with exaggerated texture. Processes, alloy compatibility, cleanliness and acceptance limits depend on the specified component.