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This standard, SSPC-SP 5 (WAB)/NACE WAB-1, defines the "White Metal" level of surface cleanliness for wet abrasive methods. One of five wet abrasive (WAB) levels: (White Metal, Near-White Metal, Commercial, Industrial, Brush-Off)
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This standard, SSPC-SP 6 (WAB)/NACE WAB-3, defines the "Commercial" level of surface cleanliness for wet abrasive methods. One of five wet abrasive (WAB) levels: (White Metal, Near-White Metal, Commercial, Industrial, Brush-Off)
This standard, SSPC-SP 7 (WAB)/NACE WAB-4, defines the "Brush-Off" level of surface cleanliness for wet abrasive methods. One of five wet abrasive (WAB) levels: (White Metal, Near-White Metal, Commercial, Industrial, Brush-Off)
Water jetting is frequently used as a surface preparation method mainly during maintenance. However, water-jetted surfaces are prone to the formation of flash rust in the time interval between surface preparation and coating application. The formation of flash rust increases with increasing temperature, relative humidity, and salt contamination concentration on the surface.
Offshore assets such as drilling rigs, production platforms, and wind turbines present challenges for corrosion prevention maintenance. The primary defense against atmospheric corrosion on structural steel in offshore saltwater environments is a protective coating system.
Several factors cause protective coatings to degrade rapidly: besides wearing and damage encountered in installation and use, ultraviolet light breaks down the organic resins and corrosive seawater causes under creep at any breaks in the coating. Maintenance coating for offshore atmospheric systems can therefore be necessary as early as the second year.
Almost 20 years ago the use of Ultra High Pressure Waterjetting (UHP) in shipyards for maintenance and for offshore projects started to be pushed, due to the development of surface and moisture tolerant paint technology becoming available. This was recognized by the likes of US Navy and Petrobras at the time.