Case 3
- Introduction
- Causes of Defects
- Good Practices
- Standards
- Maintenance and Diagnostics
- Remedial
- Similar Cases
- References
Remedial (see also Remedial)
Corrosion Removal
Mechanical Method
When paint is present, it must be removed prior to corrosion removal by mechanical or chemical means as appropriate. Abrasive blasting shall be used only when a final protective coating will be applied. The treated area should finally polish with suitable material.
Chemical Method
Chemical corrosion-removal methods can be used when no danger exists that the chemical being used will become entrapped in recesses and when there is no danger that adjacent materials will be attacked. Stainless-steel brushes or stainless-steel wool can be used to assist in removing corrosion products. The chemical solutions can be applied by brush, rag, sponge, or stainless-steel wire brush or stainless- steel wool to clean the surface. The compound should be permitted to remain on the metal surface for approximately 2 to 5 minutes. Residue should be removed with damp rags followed with dry rags.