Harnessing the energy potential of our oceans is a critical development in producing clean and sustainable energy, and reduce the effects of climate change on our planet.
AFT Fluorotec have been producing industrial grade components and providing market leading components for the most hostile environments on Earth, and are able to lend this knowledge and expertise to benefit applications in the tidal & wave energy industry.
Our durable bespoke coatings are more robust than alternatives and the anti-friction properties of our fluoropolymer components help improve the efficiency and longevity of energy applications.
Key Properties of Our Materials
Components used in tidal and wave applications have to function a long time in extremely harsh environmental conditions. How does applying AFT’s specialised coatings enable components to have a long service life?
Corrosion occurs when a ‘galvanic’ cell exists. This causes the degradation of the metal surface and the production of unwanted rust deposits.
AFT’s specialist coatings form a protective barrier on the surface of the part preventing the establishment of any ‘galvanic’ cell. Therefore protecting the surface from degradation and the formation of rust.
With the correct pre-treatment, parts coated with AFTs specialised coatings can last up to 3,000 hours in ASTM B-117 salt-fog test.
Anti-galling and seizing
A fastener subject to seize installed in a difficult and hard to reach location, will be difficult and costly to remove, and will often involve some form of cutting operation. Application of a specialised PTFE based coating, will allow fasteners to be removed and adjusted with relative ease.
Enables fasteners to be safely tightened to higher tensions
An application of an AFT Fluorotec Coatings such as AFC2104 or AFC2114 will enable tightly controlled torque and tension relationships without exceeding the elastic limit of the metal.
Assembled parts are held together with a clamping force which is provided by the tension in a fastener. Tension is the stretch or elongation of a bolt. Torque is the ‘twisting force’ required to tighten a fastener. Parts are assembled using a ‘torque wrench’. The Torque wrench is simply way of applying and measuring the Torque or ‘twisting force’.
There is a relationship between torque and tension that enables you to ‘know’ the tension in a fastener by measuring the torque applied in assembling the part. However, there are many factors affecting the validity of this relationship so ‘safety allowances’ have to be made to accommodate this inaccuracy.
Ideally fasteners are tightened to the maximum tension without exceeding the ‘elastic limit’ of the metal when the bolts stretch becomes permanent. As you can see from the graph to the right, AFC 2104 and 2114 coatings reduces these inaccuracies.
So, fasteners can be tightened up closer to the ‘elastic limit’ with confidence of not exceeding it. A tighter fastener works better and requires less maintenance than a less tight one. Also, lower torque (effort) is required to tighten the fasteners.
Just another example of AFT Fluorotec again providing solutions for our customers.