Adding paraquat to antifoul paint?

[Guest]

A crappy old steel barge with a 2" thick layer of antifoul applied by a gorilla with a 6" brush probably would last 4 years ... and even if it was a bit lumpy, who would know or care?

Crappy?? Crappy??? She was and still is a sexy beast thank you. 2" about the only thing here at 2" is your......................... Yes, little finger

 

The barge was painted by 2 racing yachties from bare steel and it's bum would have been smoother than many yachts. Besides smooth comes from application knot what sort of paint.

 

Interestingly enough it only fouled and then knot that much on the sides. The bottom only got slime on it and then knot much of that either. To be honest we were surprised, in the pleasant way. That's pretty damn good seeing she spent most of her time in the warm shallow waters of the Mahurangi and that area.

 

Go see a paint seller who does commercial gear and tell them what you want. You won't find the same paint on their shelves as you do in the chandlers.

 

The vege oil based stuff the Navy had a ways back was bloody good and did work better with the addition of chilli powered or so my Pa in law reckoned.

dried ginger powder

That's for Gout and sea sickness knot anti fouling

[Grinna 2]

Crappy?? Crappy??? She was and still is a sexy beast thank you. 2" about the only thing here at 2" is your......................... Yes, little finger

 

heheehehehhehehe ..... trolling with bait is such fun Guaranteed a bite or two

 

I'm not 100% sure but I thought the Navy were still allowed to use TBT and similar stuff that we're not allowed to use. Different formulations apparently work better in different situations .... clear water allows better light penetration and better algal growth conditions for instance. Don't know if there are too many hard and fast rules when it comes to antifouling.

[Guest]

heheehehehhehehe ..... trolling with bait is such fun Guaranteed a bite or two

You're a brave little bugger when you consider I know where your boat lives

 

The Navy use whatever the people in the windowless office with zero paint knowledge somewhere buy for them. This time it's XX, next time YY, who the hell knows, they sure don't.

 

What's more they will be paying RRP times 2. The sad part is they will still think they are getting a hell deal.

[wheels 543]

There are a heap of alternative Antifouls being used around the world now. Copper will possibly not be around for much longer. The main issue at the moment is that there is no hard evidence on what environmental issues copper maybe creating, but there are certainly many questioning if it is any safer that Tin was. Tin made a major impact on the immediate area of the Marina's and when it was banned and Copper came in, Marina's started to see life in them again. So the natural result was that people thought it was therefore good for the environment. They are now questioning that and are wondering if it is just doing major damage in a less visible way. Plus the expense of Copper is driving the price up of these types of paints and so the finding of alternatives that are either cheap, or last far longer thus making them cheap over their life, has been on the go for a few years now. The biggy is that it takes some years of testing and changing and testing again, before you get something with promise. So it is slow to see them get to the market.

 

However, there are several antifouls now available that do not use any form of Biocide at all. They work by creating a surface that is difficult for anything to adhere too. With the Boat sitting still, they will allow growth to settle, but once underway, the growth will fall of. Most can be scrubbed. But the big negative is the cost. They are bigtime expensive and often are part of a "system. so the old Antifoul would have to be removed and then the new one applied after primers etc. But!!!! they can also last many years. some have a Ten year performance and thus the cost suddenly becomes quite cheap.

 

Hempel Paints. www.hempel.us

There is a NZ distributor here in Auckland.

Silicone elastomer.

This type of coating provides a slippery, water-repellent, low-friction surface to which micro-organisms have difficulty attaching. When vessels are stationary, micro-organisms may begin to settle. However, the natural movement of water when a vessel is in motion helps scour away the attached micro-organisms.

a) Hempasil 77500

Hempasil 77100

c) Hempasil 77500 is for high activity vessels. When operational parameters are above 75% activity and 15 knots service speed, Hempel will issue a performance guarantee against fouling.

d) Hempasil 77100 is for high speed crafts. When operational parameters are above 50% activity and 25 knots service speed, Hempel will issue a performance guarantee against fouling.

Maintenance requirements will depend on the vessel activity level. Fouling can be removed with a nylon brush in order to avoid coating damage.

The flexibility of the coatings can be renewed after 5 years by applying a new layer of fresh topcoat on top of the old topcoat, making it possible to operate for 10 years with only 3 coating layers applied on the anticorrosive coating.

 

 

CSL Silicones, Inc. www.cslsilicones.com

a) Si-COAT 565 is a one-coat system suitable for non-metallic hulls only. It was designed specifically for pleasure crafts. 565 Fouling is best removed by hand cleaning with a rag or stiff brush while growth is still wet. In some cases, fouling may release when the vessel moves. Si-COAT 565 is designed to last a minimum of 7-10 years.

Si-COAT 561 basecoat/567 topcoat is a two-coat system suitable for metallic hulls. It is suitable for deep sea vessels travelling between 15-30 knots, and it is designed to self-clean during vessel movement.Both coats can be applied by spray or brush/roller. 561/567: Marine growth will release when the vessel moves. As vessel approaches 8 knots, fouling loosens and as vessel exceeds 13 knots, fouling will clear. May be cleaned also with minimal pressure water wash. Si-COAT 567 must not be abraded by manual cleaning methods. Si-COAT 561 basecoat/567 topcoat system is designed to last a minimum of 5-7 years.

 

 

Specialty Polymer Coatings http://www.spc-net.com/marine/ products/index.htm

SP1000ST

The recommended types of vessel uses for the SP 1000ST® are cargo ships, freighters and work boats that do not have heavy traffic against their sides. The speed of these ships should be over 10 knots.

Use a scrub brush to remove the fouling organisms and slim. The coating can be touched up using roller application and smaller repair kits that the deck hands can use while the vessel is in service.

This coating is designed to last up to 7 years if maintained correctly.

 

 

Ecological Coatings www.ecologicalcoatings.com

EC 4300, 4600, and 4900

Ideal for vessels with higher activity levels such as fishing boats, tug boats and ferries.

Growth can be removed with the movement of the vessel and by manual cleaning with a sponge, cloth or mop wipe.

The coatings can last up to four seasons in fresh water, three in salt water, but depends on usage, cleaning and if the coating is exposed to abrasion.

 

 

ePaint www.epaint.com

Photo-active coatings

When immersed in oxygenated water, the product photochemically generates minute levels of peroxides, are effective in deterring the settling of fouling organisms on the hulls surface. The peroxides do not persist in the environment because they quickly decompose back into oxygen and water by natural ions dissolved in the water.

a) EP21 is a single component, solvent-based, photo-active release coating. It is compatible with aluminum, fiberglass and wood substrates and over most existing bottom paint systems. It is ideal for recreational boats.

Sun Wave is a two-component, water-based epoxy, photo-active release coating. It is compatible with aluminum, fiberglass and wood substrates and over most existing bottom paint systems. It is suited for recreational & commercial boats, high speed boats and boats frequently launched and hauled by trailer.

 

The movement of the boat should be enough to knock off any fouling that occurs if the boat has been sitting for a while. Gently scrub with a Scotch-Brite type pad or sponge to remove any fouling that does accumulate.

When the manufacturer’s recommended amount of paint is applied, at least 12 months of in-water service-life should be achieved. However, the coatings may perform longer in cooler waters where the sunlight is less intense.

 

 

Alex Milne www.alexmilne.com

These products adhere to hulls by molecular attraction. In addition to preventing hull growth, they also prevent osmosis.

a) Easy On Bottom Wax is applied with a soft cloth. It cures in 12-24 hrs to a soft moveable invisible surface that is not polished.

Easy Spray Bottom Coating is sprayed on with trigger spray bottle, thinned out with soft cloth, and cures to allow boat surfaces to be polished.

Products can be used on fiberglass, aluminum, wood, rubber, steel, concrete, electronics, and outdrives, as well as over old toxic anti-fouling paint. Can be used for a full season in freshwater and intermittently in saltwater. Ideal for racked and trailored boats, pontoon, sail, power, and inflatables.

Clean with sponge, deck brush, or white abrasive pad when fuzz develops. These coatings cannot be removed by pressure wash or acid wash. Only a high Ph detergent wash will remove the coating

After cleaning, apply a thin overcoat each season.

 

 

 

Aurora Marine Industries Inc. www.auroramarine.comPolymer

Slippery coatings that reduces surface friction and seals fiberglass to prevent osmosis

 

a) VS721 Bottom Coat is a clear coating that can be used on aluminum, fiberglass, and hard painted surfaces. Ideal for powerboats, jet boats, sail boats, trailered boats, fishing boats, PWC's, and pontoons.

Repelin is a clear, flexible, coat designed for inflatable boats and rigid inflatable boats. Can be used on hypalon, PVC, fiberglass and aluminum.

Both products can be used on salt/fresh water boats that stay in the water for short/long periods of time. In each case, 2 coats are needed and are applied with a damp sponge. Cannot be used over existing antifouling paint.

 

Regular use of vessel will self-clean the hull. Stationary boats may be cleaned periodically with a sponge or deck brush. At end of season or upon attachment of marine growth, pressure wash or wash off with Boat Clean Plus and a sponge.

Coatings need to be reapplied each season.

 

 

 

Consolidated Coatings www.consolidatedcoatings.com

Teflon-based coatings

These types of coatings provide a non-stick surface that prevents organisms from adhering to boat surfaces.

a). Swiftsure. Ideal for aluminum hulls below the waterline and aluminum outdrive legs.

They are suited for racing-boats and vessels with a high activity level. Not ideal for vessels operating below 18 knots.

When the vessel is not in motion, some organisms may start to attach. The organisms can be washed off by the vessel through the water, by gentle scrubbing, or through pressure washing when the boat is out of the water.

The exact longevity of the coating will depend on how well the surfaces are maintained.

 

 

 

Sound Specialty Coatings www.sscoatings.net/aquaplym.htm

Aquaply M

Hard epoxy coatings

These coatings provide a hard, slippery and durable surface. They do not contain solvents and have zero VOCs.

Ideal for wood, metal and fiberglass hulls, for pleasure crafts and work boats. Require's frequent and aggressive cleaning (perhaps once a month in warm waters). Use soft cloth, brush, or burlap to remove marine growth. Manufacturer claims that the surface is cleanable by divers.

They are expected to last for many years. Manufacturers have reported that their coatings have lasted from 6-12 years.

 

 

International Paints www.internationalmarine.com/ include/Intersleek900_Brochure.pdf

Fluoropolymer.

Intersleek 700

Intersleek 900. This product has a lower coefficient of friction and provides a significantly smoother surface than Intersleek 700.

Ideal for steel, aluminum and fiberglass hulls. Can be used by all vessels above 10 knots, including scheduled ships, tankers, bulkers, general cargo ships and feeder containers.

Low pressure fresh water wash

Each coating system has a life expectancy of 5 years before recoating would be required.

 

 

Specialty Polymer Coatings http://www.spc-net.com/marine/ products/index.htmPolyurethane

This type of coating has fouling control and anti-corrosion properties. The tight binding molecules create a slippery surface that prevents organisms from attaching to the surface of the coating and prevent water from penetrating through the coating. There are no VOCs released by the product and the product cures quickly. The manufacturer also claims that the boat does not need to be cleaned as the organisms simply slough off when the vessel moves.

SP 1386® and SP 1864®

Both coatings are for ships that are moving at approximately 15 knots. Both products have been used on vessel types from barges, tug boats, Great Lake Cargo ships, to Canadian Coast Guard Ice Breakers.

The SP 1386® contains an elastomeric polymer that gives this coating a 50% elongation and is mainly used in underwater areas that flex or that need cushioning such as dock pillars piles, and ballast tanks. The SP 1864®, on the other hand, does not flex. Both coatings are designed for abrasive environments.

The coatings can be touched up using roller application and smaller repair kits that the deck hands can use while the vessel is in service. The coatings can be cleaned using a scrub brush to remove the fouling organisms and slim.

These coatings are designed to last up to 7 years if maintained correctly.

 

 

 

Cerakote Clear Coatings

Manufactured for Viking Performance Coatings (VPC) by NIC Industries

www.vikingperformancecoatings.com

Ceramic coatings

These coatings provide an oxygen and water barrier between the boat hull and the water. They bond tightly to the hull and create a surface that makes it difficult for organisms to attach. More resistant to abrasion.

This coating can be applied to non-ferrous metals, plastics, paints and powder coated substrates.

Come in gloss or matte finish.

The material is best applied with typical HVLP spray equipment at very low pressure.

This coating can be used on boats of various operating speeds and activity levels.

Lasts Up to 10 years.

 

 

CCeRam-Kote Coatings Inc. www.ceram-kote.com aluminum.

eRam-Kote 99M

Cleaning frequency will depend on the temperature of the water.

[Atom Ant 0]

Any questions anyone? Any at all?

[wheels 543]

To add, there is some work also going on with "natural" anti-fouling coatings. Scientists are working on trying to understand what plants and animals use in their ocean world to stop being coated themselves.

 

I can also say that after much testing on the Fullers Ferries, the Ultrasound didn't work.