Corrosion Mapping
Corrosion Mapping is best used to map and monitor internal corrosion and can be used with automated scanners, manually, or using a Phased Array (PA) Hydro form method.
Advantages
• Large volume of data collected.
• Good for monitoring purposes.
• Inspection can be carried out through surface paint.
• No scaffolding required when using automated scanners (on ferromagnetic material).
What defects/indications can it detect?
• Corrosion or thinning.
• Inclusions/laminations.
• Cracks.
Commonly used to test
• Storage tanks.
• Pressure vessels.
• Pipe work (more commonly used on large diameter pipe work).
Limitations
• Surface condition needs to be clean/ smooth.
• Automated scanner can only be used on ferromagnetic materials.
• Can be difficult to use on complex geometries.
Alternative inspection methods
• Phased Array (PA) (Hydro form method).
• Radiography (RT) (Profile method).