COATINGS
Not a single slip up T
here are few environments where slipping and
corrosion are as dangerous as off-shore gas platforms – let alone a bridge between such megastructures.
But a new durable non- slip coating launched by Metallisation Ltd, called 28E ARCTEC, has been selected as the ideal solution for the North Rankin platforms off the Australian coast and could be the coating solution for railway environments.
The product is ideal for use on any steel surface area where the public have access. This includes steel floor footbridges, rolling stock and station steps and steel manhole covers in pedestrian areas.
Untreated, these steel surfaces can become very slippery, especially in wet conditions, and are prone to corrosion. To ensure safe walking in industrial operating conditions, vital to personal safety and corporate productivity, the 28E ARCTEC coating provides a durable non- slip anti-corrosion coating.
28E ARCTEC coating is a thermally sprayed coating that can be applied with a rough texture. It has excellent non- slip properties, while being extremely hard and resistant to wear. The new coating provides a suitable level of grip, to avoid personal slips or industrial skidding; comparable corrosion protection to aluminium, as used in aggressive environments;
Cycles Completed Initial
250,000 500.000 750,000 1,000,000
and easy application by a longstanding process, covered by international standards.
The resultant coating is corrosion resistant and because of its durability, site owners can be confident that once applied, they can forget rust or the risk of slipping for many years. To prove the durability of this heavy duty coating, Metallisation has completed many tests in the development of 28E ARCTEC wire and coating. These included non-slip, durability and corrosion testing.
28E ARCTEC coatings have been tested for non-slip and durability using a Pendulum Coefficient of Friction (CoF) tester, in accordance with independent British Standards and UK Health and Safety Executive (HSE) guidelines. These guidelines suggest a floor coating with a Pendulum Test Value (PTV) greater than 36 will have a low slip potential in pedestrian areas.
Un-sealed sample Pendulum Test Value Dry 80 66 65 64 64
To prove the durability of the coating, the coated plates were walked on by a standard shoe on a robotic walking machine. The plate was rotated after each step to simulate walking in a straight line and around corners.
The PTV was checked before walking and again after 250,000, 500,000, 750,000 and 1 million steps. Both sealed and unsealed plates were tested in wet and dry conditions.
The Pendulum Test Values, obtained in accordance with BS7976-2:2002, highlighted significant results, shown in the table below. Even after 1 million footfalls, the PTV results remain greater than 36, ensuring a low slip potential.
The 28E ARCTEC coating has undergone a range of accelerated corrosion testing. This offers a comparison of the performance between the new coating and 99.5% aluminium. An independent research laboratory
Pendulum Test Value Wet 75 50 49 43 41
undertook two tests: galvanic corrosion tests for one week and neutral salt spray corrosion tests for 1,000 hours, performed in accordance with ASTM B117.
The test results confirmed the corrosion protection offered by 28E ARCTEC coating was comparable to 99.5% aluminium. These results give the confidence the new coating will provide the same high standard of corrosion protection that aluminium has been doing around the world for several decades.
The product got a big endorsement recently when it was chosen for the twin- platform, offshore LNG North Rankin platform installation’s bridge following extensive evaluation of non-slip coatings. 28E ARCTEC wire was chosen as the preferred coating to be applied to the bridge deck surface because of its non- slip durability and corrosion protection.
Sealed sample (epoxy) Pendulum Test Value Dry 72 70 71 69 68
Pendulum Test Value Wet 66 63 61 60 58
rail technology magazine Dec/Jan 11 | 25
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