#Knowledge# I don't know if you noticed that the bottom of almost every ship is a striking red, why is this?
It turns out that there are a variety of marine organisms in the seawater, among which such as oysters and anemones especially like to grow on the surface of various objects attached to the water, and the hull is also a very good environment, although these species are small, but still increase the weight of the ship itself, affect the smoothness of the hull shell, and increase the resistance during navigation. Data confirm that seafloor vegetations can reduce the transmission power by 5-10%, and the number may be higher in severe cases. Therefore, in order to prevent bio-proliferation, some toxic substances such as copper oxide, mercury oxide, phenolic and other substances are added to the anti-rust paint applied to the bottom of the ship, and as these toxins slowly seep out, marine organisms will not grow in these places, so that the hull can remain clean for a longer time. The ship's underwaterline is painted more, using an iron-red anti-rust paint, so the bottom of the ship is almost orange-red. With the oozing of toxins, the toxicity of the hull paint decreases, and slowly there will still be organisms attached to the bottom of the ship, so the ship has to go into the dock every once in a while to clean the bottom of the ship and repaint the paint. In addition, due to the harsh environment in the ocean, high temperature, high humidity, high salt environment, steel soaked in it, easy to rust, painted, steel and finally isolated from seawater, thereby slowing down the rust speed.
