Metals exist on earth as compounds (oxides, sulfides, etc.), but they are reduced (refined, etc.) and used industrially. Therefore, in the natural world environment where oxygen exists, it will return to an oxide. This phenomenon is called natural corrosion.
Countermeasures
After a certain period of use, it is necessary to perform the following inspections and evaluations to prevent fracture:
- Subcategory: Natural Corrosion
- Damage mode: Metal loss (Thinning), Cracks
- Inspection: Visual inspection.
- Evaluation: Assessment of rust condition and integrity of coatings and protection.
- Actions: Establish criteria for repair, component replacement, and recoating based on the assessment.