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In an extreme environment
such as Kazakhstan, effective surface preparation and correct application
methods are essential to ensure the effectiveness and longevity of any coating
system. Denholm Zholdas offers a full range of surface preparation techniques
including wet and dry grit blasting, mechanical preparation and Ultra High
Pressure (UHP) water jetting, all performed to internationally accredited
standards.
Grit blasting is a well established and economical method of surface
preparation. Using a variety of blast media in a jet of high pressure air, it is
an effective method of preparing metalwork prior to painting or coating. As it
is an abrasive technique, it profiles the surface of metalwork to provide an
effective key for the paint.
In more environmentally sensitive areas, UHP Water Jetting is rapidly becoming
the method of first choice for many applications. Water at extremely high
pressures (30,000-40,000 psi) effectively strips old coatings leaving the
original profile intact. As no grit is required, clean-up time is greatly
reduced, airborne dust is eliminated and much less disruption is caused to
nearby work. Denholm Zholdas operates a fleet of fully self-contained UHP units
specifically designed for use in remote locations.
Other methods of surface preparation employed include mechanical preparation
such as needle guns, abrasive discs and flap wheels. Denholm Zholdas also
operate the accustrip technique utilising a soluble abrasive.
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