What is Pinpoint Corrosion

Pinpoint Corrosion

What is it?

Pinpoint rusting refers to a type of corrosion that results in the formation of tiny, dispersed spots of rust across a metal surface.

Pinpoint rusting typically occurs where pinholes or holidays are present in a coating.

Prevention:

• Ensure that an adequate thickness of a primer coat is applied to cover the surface profile.
• Use a thicker coating system.
• Protect coating from contamination with grinding dust etc.
• Stone chips or scratches should be repaired immediately.
• Ensure through cleaning of all metal surfaces with an appropriate metal cleaner.
• Sandblasted areas should be coated immediately after blasting to avoid flash rusting.
• Seal and protect all cavities.