Surface Treatments
ATMOSPHERIC EXPOSURE
Sheet piling is often used in situations where part of it is
exposed to the atmosphere, such as a retaining wall. In such
applications, the aesthetic and functional look is important. A
coal tar epoxy finish or rusty surface is unlikely to be
acceptable and so polyurethane finishes have become the
preferred choice. They combine gloss and colour retention and
the latest formulations are easy to apply and maintain.
Suggested Systems
- Zinc silicate epoxy primer
- Re-coatable epoxy intermediate coating
- Aliphatic polyurethane topcoat
- Nominal dry film thickness of the system 240µm.
FRESH WATER IMMERSION
Fresh water is usually less
corrosive than sea water although brackish or polluted conditions
can still be quite severe. For convenience we offer a system that
performs well both above and below water, which avoids the need to
apply separate systems and hence saves time and cost.
Suggested Systems
- Polyamine cured epoxy coating
- Nominal dry film thickness of the system 300µm
SEAWATER IMMERSION
Structures completely or partially
immersed in sea water require careful attention. Cathodic
protection is often specified in combination with a coating
system, and it is important that the chosen coating system
has been fully tested for compatibility.
Suggested Systems:
- Polyamide cured epoxy primer
- Polyamide cured coal tar epoxy coating
- Nominal dry film thickness of the system 450µm
WASTE DISPOSAL
Sheet piling is increasingly being used to
isolate severely contaminated ground. It is also used to contain
polluted soil which has been transferred from other areas. Therefore
the coating system may have to protect the steel from highly acidic
soil and needs to have a high level of chemical resistance, as well
as withstanding mineral and organic acids and withstanding abrasion
and impact.
Suggested Systems:
- Micaceous iron oxide pigmented polyamide cured epoxy primer
- Polyamine cured epoxy coating with increased chemical resistance
- Nominal dry film thickness of the system 480µm
- Basements
- Containment Barriers; and
- Demountable Foundations
The main sealant options are:
- Empty Joints
- Hot applied bituminous product
- Compressible sealant product
- Hydrophillic sealing product
- Welding of Joints
Welding of the sheet piles interlocks in perhaps the most effective
way of permanently sealing sheet pile interlocks. However, to achieve
a quality weld it is necessary to clean the surface and carry out the
welding in dry conditions. A special welding procedure for this situation
is available, please contact us for further information.
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