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WHAT IS KARINA TOXIC PAINT?
Karina Paint
The hull is the name given to the part of the boat that is in constant contact with water. Antifouling (poisonous) paints are used to paint the hull area of the boat, which is constantly exposed to the effects of saltwater.
Why use antifouling (toxic) paint?
Some of the creatures living in the sea have to hold on to a hard surface in order to survive. A hard surface such as a ship's hull is a suitable environment for these creatures. The settlement of plants and animals here is called fouling.
The main reaction of antifouling paints is to prevent the precipitation of fouling organisms on the hull of the boat. Fouling increases the friction effect of the water by roughening the sheet metal. The increase in the friction effect increases the fuel consumption and decreases the speed of the boat.
If this settlement consists of mussels and other hard-shelled animals, they destroy the paint film, causing the bare metal to appear and corrosion. If the deposits also contain algae and other vegetable pollution, then a large layer of both vegetable and animal pollution, called the beard, is formed.
This layer on the hull increases frictional resistance, reduces boat speed, and increases fuel consumption. In this respect, the function of antifouling paint is very important.
The toxic substance in the paint should prevent the embryo of the organism from adhering to the surface. To keep fouling under control, antifouling paints contain chemicals that prevent or kill marine life.
Who we are
Anti-Fouling(toxic) paint
Toxic dyes are dyes that melt in a controlled manner by chemical reaction with seawater. The most important factor that determines the performance of antifouling paint is the resin structure and the agents that prevent algae and other living organisms called biocides.
The paint film softens by reacting with seawater, and the layer softened by friction during the cruise gradually melts and the biocides in the paint film come to the surface and create a poison effect. If the boats do not cruise, the protection of the antifouling paint will be as much as it melts where it waits. The agents remaining in the paint film cannot rise to the surface and contamination begins.
Antifouling paints not only prevent pollution but also strengthen the surface texture. Since there are more than 4000 types of marine pollution, antifouling paints must have good properties to protect the ship's surface from living things.
Among the anti-fouling paints; are self-cleaning copolymers, copper-containing antifouling paints, fouling-released antifouling paints, and tributyl (TBT)-free SPC paints, tributyl-free self-cleaning hybrid paints can be listed.
Toxic dyes try to introduce biocidal substances that can dissolve in seawater in a controlled manner. If the delivery rate is too high, the paint life will be short, if it is less, the paint will not be effective. This speed also varies according to the resin used.
Factors Affecting The Amount Of Melting Of The Poisonous Substance
- Temperature, salinity, and pH value of seawater,
- The speed of the water current,
- Type of primer and anticorrosive paint,
- The effect of the fouling layer,
- The thickness of the antifouling paint film can be listed.
Copper-based hull paints
Only organisms living in the sea are effective against animals (mussels, etc.). It can also be made effective in the flora by adding herbicides.
Tin-free hull paints
Permanent damage of tin-containing antifouling paint to marine ecosystems has been determined, and for this reason, restrictions and prohibitions have been imposed on its use, primarily by the International Maritime Organization. Therefore, we need to use tin-free paint.
Tin-free hull paint is not very effective against fouling, so it is suitable for ships that do not sail frequently.
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