Bunds are generally used around storage tanks as secondary containment and are sized to hold 110% of the capacity of the storage tank. Bunding oil storage tanks is a legal requirement under the Control of Pollution (Oil Storage) (England) Regulations 2001. Most brick or concrete bunds quickly lose their resistance to water leading to seepage through the bund. Metal tanks can rust leading to formation of holes.
Bunding are cleaned out and blasted to remove any previous failed coatings/contaminants. The resin systems are fully and chemically bonded to the sub-base. Where required fibreglass matting is incorporated or for very high risk areas or where severe chemicals are stored resin renders are used.
External tanks and associated pipework can be subject to corrosion from exposure to weather or chemicals. When rust starts to form this can affect the integrity of the tank as well as resulting in poor appearance. When asset protection is important then a repaint using appropriate resins is essential.
The first stage is to shotblast or mechanically prepare metalwork to achieve a sound base. An epoxy primer provides excellent adhesion, followed by an epoxy tie-coat. This acts as an undercoat building up the dry film thickness. A two-part polyurethane top coat is then applied to achieve maximum corrosion resistance and aesthetic appearance. Excellent levels of gloss retention makes the tank/pipework look good for a long time.