EXPLORATION • DRILLING • FIELD SERVICES OPERATIONS & MAINTENANCE
coatings market. Whilst these products are essentially lubricants, a broad range of additional properties makes them highly suited to applications in chemical and corrosive environments, at high temperatures or where components may be subjected to heavy loads.
applications where low friction is required. To meet the common challenges faced
LUBRICATION AND RELEASE COATINGS By varying chemical compositions, manufacturers have been able to develop economical solutions to suit a wide range of applications from PTFE lubrication, FEP (Fluorinated ethylene propylene) lubrication, to MoS2
applications for high-pressure
by much of the equipment operating in the field, scientists have combined the benefits of two highly effective polymers; polyphenylene sulphide (PPS) and PTFE. PPS contributes chemical resistance at high temperatures, and excellent bonding and abrasion resistance whilst PTFE brings non-wetting attributes and wide-ranging chemical resistance. Together they can create coatings that resist most acids and alkalies, and are almost entirely unaffected by solvents up to 205°C.
HEAVY-DUTY COATINGS IDEAL FOR OIL & GAS SECTOR
Developed to extend the service life of large fasteners and related equipment, these tough coatings – some of which are referred to as “barrier” coatings – protect components from both chemical and mechanical damage. Key properties include good resistance to salt-spray, excellent acid-rain resistance, and protection from chemical exposure where high levels of pH is a factor. Static electricity is also a common challenge for the oil & gas industry and heavy-duty coatings have been specifically developed to address the issue by modifying the basic formula. As a result, components can now be protected in a manner that will help to dissipate static electricity. Other heavy-duty variations can be
employed to reduce friction, facilitate make-up torque and lubricate parts that are required to operate under extreme pressure. Xylan 1425, for instance, provides long-
A typical PTFE-coated fastener
lasting lubrication for bearing surfaces, withstanding pressures of up to 150,000 psi. Whilst traditional “moly” greases will tend to get washed away, this waterborne/ VOC-compliant product combines PTFE and MoS2
to create a dual-lubrication
system. To summarise, there is a product to
meet virtually every type of situation where components require protection or lubrication, and the coatings industry is continually formulating new solutions to meet the constantly evolving demands of the petrochemical sector.
Carl Allison is General Manager - Commercial at Plastic Coatings Ltd.
www.plasticcoatings.co.uk
www.engineerlive.com 29
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