Antifouling coating

Test method for determining the resistance of paint films and related coatings to fungal defacement by accelerated four-week agar plate assay 

Resistance to growth of mold on the surface of interior coatings in an environmental chamber 

Standard method for evaluating degree of surface disfigurement of paint film by fungal growth or soil and dirt accumulation Standard practice for determining by exterior exposure tests the susceptibility of paint films to microbiological attack 

Method of test for paints - Assessment of resistance to fungal growth Mildew resistance of organic coating materials 

Test of paint, resistance against fungal growth 

Examples of algicides which may be used in antifouling coatings instead of organotin compounds are  

With the aid of concrete additives the viscosity and the hardening of concrete is controlled. Most of the concrete additives are based on lignosulphonates which are able to reduce and to control the amount of water needed to make concrete mixes workable. Lignosulphonates are a by-product of wood pulping (with every ton of pulp produced a ton of lignosulphonates is produced). They are by nature highly susceptible to microbial decomposition. Corresponding concrete additives therefore must be treated with preservatives in order to ensure that they function correctly when used. 

Examples of microbicides appropriate for the in-can/in-tank protection of concrete additives are  

Among the bacteria which are generally associated with slime problems there are species that are highly resistant to changes in their environment they thrive in water under anaerobic and aerobic conditions, at low and at high salt concentrations, and at temperatures ranging from 0 to 70°C. 

A large variety of slimicides and algicides belonging to different substance classes is offered to inhibit microbial growth in cooling water systems. The microbicides are mostly applied as a shock treatment as soon as the viable cell count reaches 10 -10 cfu/ml. 

The xerogel hlms can be tailored to provide surfaces of different wettability and critical surface tension, and the approach has been patented8 in the development of a product (Aquafast) that was commercialized in early 2008. The product s usefulness and versatility is 

Recently, a number of antifouHng products have been developed using microencapsulation technology [71,72]. For the nonbioddal approach, polymers with low 

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Cathodic protection of an uncoated ship is practically not possible or is uneconomic due to the protection current requirement and current distribution. In addition, there must be an electrically insulating layer between the steel wall and the antifouling coating in order to stifle the electrochemical reduction of toxic metal compounds. Products of cathodic electrolysis cannot prevent marine growths. On the contrary, in free corrosion, growths on inert copper can occur if cathodic protection is applied [23]. 

Munk, F. and Rothschild, W., Interaction between Anticorrosive and Antifouling Coatings in Shipsbottom Painting , J. of Paint Techn., 43, 557 (1970)... 

Butyltin compounds, in contrast, are produced only anthropogenically. Besides the applications covered in this CICAD, there exist other applications of butyltin compounds that may represent a significant source of these substances in the environment. In particular, the use of tributyltin compounds in antifouling coatings represents a significant source of these substances in the marine and freshwater environments. Hence, many of the measured concentrations reported will relate predominantly to this use. 

Organotin levels of the sediments, especially in tributyltin, are found to be very high compared with those of waters. It has been shown that Bu3Sn+, like other organometallics, is adsorbed rapidly by marine and other sediments. The sediment therefore represents a sink for Bu3Sn+ leached from the antifouling coating of boats. 

Aquafast has been applied to the camera used by Sicily s Superintendence of the Sea to monitor the archaeological site of Cala Gadir (Figure 4.8c) and the product is now finding application as an antifouling coating for all the cameras installed by this authority in the sea around Sicily. 

M. R. Detty, M. D. Drake, Y. Tang and F. V. Bright, Hybrid antifouling coating compositions and methods for preventing the fouling of surfaces subjected to a marine environment, US Pat., 1 244 295 B2, 2007. 

Coatings, 7 1, 77-150. See also Antifouling coatings Electroless coatings ... 

Control elements, final, 20 684-687 Controlled atmosphere storage (CAS), of food products, 12 77 21 564-565 Controlled delivery devices, biocompatibility of, 9 56 Controlled depletion polymer antifouling coatings, 7 158... 

Dichloro-22 2-octyl-4-isothiazol-3-one, biocide for antifouling coatings,... 

Hydration antifouling coatings, 7 158 Hydraulic atomizers, 23 175 Hydraulic cements, 5 467, 500-501 Hydraulic-centrifugal classifiers, 22 275 Hydraulic classifiers, 76 619 Hydraulic conductivity, of landfill liners, 25 878... 

Pohshing agents, as food additives, 22 57 Pohshing antifouling coatings, 7 158 Pohshing compounds... 

Prevetol A4, biocide for antifouling coatings, 7.T56 Prewetting, 22 279 Priceite (pandermite), 4 133t Prices/pricing. See also Cost entries Economics... 

Zinc formaldehyde sulfoxylates, 23 677 Zinc forming-die alloys, 26 594 Zinc foundry alloys, 26 591-594 Zinc hydrosulfite (dithionite), 26 559 Zinc hydroxypyridmethione biocide for antifouling coatings,... 

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