Anochrome Technologies has worked with fastener manufacturers to test an anti-corrosion coating on motorway barriers.
The advanced zinc flake finish is applied via spray application, ensuring uniform coverage while maintaining a thin coating thickness of less than 20 microns. The company said the process is more environmentally friendly than galvanising.
In addition, the spray application of zinc flake technology eliminates the risk of thread blocking on large screws and bolts, a common issue with thicker, multi-layered coatings.
So far, thousands of fasteners have been trialled on motorway barriers.
“We are delighted to partner with providers of fasteners to highways agencies to demonstrate the benefits of this new solution. Galvanising offers excellent corrosion protection, but we believe we have a solution that is equally effective, more sustainable, and fully C4 and C5 compliant,” said Mark Smith, Assistant General Manager at Anochrome Technologies. “Both the process to apply the finish and the product itself are more environmentally friendly, making it a better option all round.”
Fasteners used on motorway barriers are traditionally galvanised to protect against moisture, road salts and fluctuating temperatures. Galvanising involves submerging a part in molten zinc at high temperature to form a protective layer. However, hydrogen atoms can be introduced into the metal substrate during galvanising, which can cause hydrogen embrittlement. This can lead to the material becoming brittle and susceptible to sudden failure under stress.
By contrast, no hydrogen is generated or absorbed when using zinc flake coatings, increasing the structural integrity of the parts and making them safer and more reliable.
Looking ahead, further batches are set to be tested in real-world conditions in the coming months.
Beyond motorway barriers, Anochrome Technologies said the coating is also suitable for the wind energy, oil and gas, marine and rail sectors.
