Research development and future trend of marine corrosion protection coatings in China
Abstract: the fluorocarbon resin is widely concerned in recent years. The new material, it has excellent weather resistance, resistance to contamination, chemical resistance, solvent resistance and is excellent material for super weatherability of architectural coatings and anticorrosive coatings. In the marine climate the extremely harsh corrosive environment, fluorocarbon resin and fluorinated polyurethane modified material as the base material of paint is an excellent choice, except for hull paint,... -
Huicong net surface treatment: the surface of the earth 4 / 5 is covered with oceans, marine economy, marine industry development of human society plays a very important role. Our country from the south to Beihai long coastline of more than 18000 km, and the temperature difference of 50 degrees, many sea creatures. Marine environment is a very severe corrosion environment, the ship is in such a marine environment, corrosion is very serious, and the paint has been its most important means of anti-corrosion. Marine anti-corrosion and anti fouling coatings are the basis of the marine coatings. According to the use of various facilities and requirements of different, and derived a variety of products, such as marine coatings, marine engineering facilities, such as heavy anti-corrosion coatings. The marine coatings fork points for anticorrosion and antifouling paint, ship hull paint, paint on the deck, cabin paint and damping and noise reduction and other special coating. Due to the special nature of the cabin, people pay special attention to the problem of its toxicity, except to pay attention to the corrosion resistance of the coating. Because the corrosion resistance of the coating affects the service time and the service performance of the ship, the toxicity of the coating is related to the health and safety of the crew. China paint is divided into a variety of different areas, respectively, in different areas. 1 heavy-duty anti-corrosion coating is a coating with a longer period of protection in harsh environment than conventional coatings, which has thick film, high solid and double composition. Heavy anti-corrosion is a system engineering, involving the use of environmental assessment, material selection, design, construction quality control and other aspects, and according to the use of the environment and maintenance of ease, the use of different objects have different useful life requirements, for marine coatings, the requirements of 5 to 10 years of protection. 1.1 heavy-duty anticorrosive paint primer usually consists of primer, intermediate coat and top coat. Because the life of ordinary Mianqi far less antirust paint, so performance of the primer is especially important, inorganic zinc rich coating is recognized heavy anticorrosive coatings universal primer. At present, the problem of heavy corrosion protection coatings system is lack of effective data support, and there is no effective method to speed up the test. Two glass flake coatings usually exist in the coating of 1.2 major categories of micro pores: 10-7cm ~ 10-5 porosity of the molecules generated from the 10-2 ~ 10-4cm pore. Solvent evaporation is the main channel of the corrosion products such as water vapor and salt spray. In this aspect, the scale paint has a good blocking effect, which is an important choice for heavy anti-corrosion coatings. Paint flake materials are mainly flaky mica, mica iron oxide, graphite, zinc, stainless steel and glass flake. Due to the low price, such as flake mica, mica iron oxide, graphite, etc., the price of glass flake is more expensive, and the glass flake is more expensive, but only in the construction of the bridge. With the requirements of the more permanent ship coatings, the heavy anti-corrosion coatings for glass flake type will be widely used. 1.3 super weatherability fluorocarbon coatings resin is widely concerned in recent years. The new material, it has excellent weather resistance, resistance to contamination, chemical resistance, solvent resistance and is excellent material for super weatherability of architectural coatings and anticorrosive coatings. In the marine climate the extremely harsh corrosive environment, fluorocarbon resin and fluorinated polyurethane modified material as the base material of paint is an excellent choice, except for hull paint, for strong corrosive medium cabin paint contact. Also valid 3 ~ 5A aliphatic polyurethane, 5 to 8A silicone change paint with super weatherability paint has a certain market. In the process, the domestic resin paint, recoating and interlayer adhesion performance is narrowing the gap with foreign products.