Frequently Asked Questions
No. Sonihull will not damage or pit finished surfaces or coatings.
Sonihull uses non-inertial cavitation induced by ultrasound to keep bio-fouling at bay. The process is an established technology, usually associated with cleaning solid surfaces.
Sonihull ultrasonic anti-fouling systems disrupt the formation and proliferation of marine colonies and provide an effective means of preventing mussels and barnacle larvae from attaching to hard surfaces in raw seawater.
The process of ‘non-inertial cavitation’ is similar to ‘inertial cavitation’. The latter is the process that can damage propellers or the insides of pumps. But the forces involved with non-inertial cavitation are much lower. So, with Sonihull, there is no chance of surface damage, like erosion or pitting. That kind of physical damage can only be caused by inertial cavitation.
The only material that Sonihull does not protect from bio-fouling is wood.
The system relies on internal resonance to transmit the ultrasonic signals to the surface being protected. Compared to man-made materials, wood is full of varying densities and voids and is not an efficient transmitter of ultrasound.
Sonihull provides effective anti-fouling protection for solid materials, including Steel, Stainless Steel, Aluminium, GRP, FRP, Kevlar, Titanium and rigid plastics.
Note - The protection of certain concrete and ferro-cement structures will depend on their individual composition. Silicone-based coatings are known to dampen up to 40% of ultrasonic signals and will reduce system effectiveness. This can be compensated by decreasing the spacing between transducers.
Each Sonihull transducer only consumes 3.6 Watts per hour.
This makes the system ideal for on-board, standby or remote powering options, using 110-240 Volts 50/60Hz AC or 12-30 Volts DC supplies.
A: Yes, The Sonihull TR-EX transducer is ATEX approved to zone 0, the world’s only ultrasonic anti-fouling system that is certified for use in hazardous zones.
This makes it an ideal choice for raw seawater cooling systems in offshore oil and gas applications, including deck-mounted LNG and LPG vaporisers.
No, the low-powered ultrasound frequencies used are completely harmless to marine mammals and ﬁsh. Unlike antifouling coatings and impressed-current systems, Sonihull does not rely on poisonous biocides, metallic ions or the release of microplastics from ablative coatings to be effective.
Wherever you have a solid surface that requires protection from marine biofouling.
We manufacture a wide range of surface adaptors so that our ultrasonic antifouling transducers can be mounted in all kinds of locations to prevent biofouling. Sonihull protects box coolers, sea chests, pipework, intakes, valves, hulls, structures, propellers, shafts, steering gear...
Sonihull bonds directly to the dry side of the item being protected, there is no drilling, welding, extra classification surveys or drydocking required. Transducers can also be mounted up to 80m from the control unit without any loss in performance, ideal for pre-fabricated structures.
The Green Marina project in Norway, which is supported by the World Wildlife Fund and the Norwegian government, has proven that for leisure boats, only three items are needed to keep a hull free from marine fouling. A hard hull coating, a Sonihull ultrasonic anti-fouling system and regular high-speed use (or a run through an in-water boat wash).
The hard coating provides waterproofing and a slippery surface to maintain as-new vessel performance. It also allows for good transmission of ultrasound and makes it difficult for organisms to establish a foot-hold. The Sonihull system prevents macro fouling like barnacles and mussels from attaching and disrupts the first stages of the food chain. The boat wash or regular use at fast speed, will remove any persistent slime and take care of any waterline weed.
Protect your vessel
Sonihull’s mission is to deliver environmentally safe, cost effective anti-fouling wherever unwanted bio-fouling persists. Our vision is:
To make dosing the oceans with poisonous biocides and microplastics a thing of the past
To deliver effective anti-fouling systems using the power of ultrasound
To save the oceans, one ship at a time
After the first week, a noticeable difference could be seen, by the end of the 4th week, the results were conclusive. The vessel fitted with Sonihull had little or no growth over the entire hull, while the other vessel was found to have so much growth the vessel struggled to get on the plane. As a result of this test, Sonihull will be included in all future standard project specifications.
MTR16 Patrol Boat
Coastguard – UAE
Finally, I am proud to inform you that the first Sonihull anti-fouling system has been installed on one of the SAR vessel without any problem. We have installed two transducers on the intake of the water jests, one between engine & generator and another one in accommodation. After finding this project successful, many other vessels will be in the row.
SAR Vessel- Gulf Arabian
Vigilant coming out to dry dock in Kuwait, she has been in the water for almost a year (February 2015) and is in a pretty impressive condition. There is no fouling at all.
Vigilant Patrol Boat – Kuwait
All pipes pretty clean/clear, bit growth in some but no mussels so obviously Sonihull is working. thank you.
Guiding Star – UK