Under the sea breeze, a 50 meters higher than the Eiffel Tower in France, the world's tallest transmission tower, delusions to stand in Zhejiang Zhoushan Jintang Island. At first glance, this tower is nothing special except the ' body ' height of 380 meters.
Its mystery is in the tower body red and white paint, this is not ordinary paint, but graphene anticorrosive coating, than the traditional zinc coating protection life can be increased 3 times times. The world's tallest transmission tower is 50 meters higher than the Eiffel Tower in France.
Huanghaihua photo The mystery is on the tower's red and white paint.
Huanghaihua photo October 17, the National 973 Plan ' basic research on key technologies for corrosion and protection of marine Engineering equipment Materials ' project was successfully completed and accepted by the Ningbo Institute of Technology and Engineering, CAS. The project is designed to put ' armor ' on steel building materials that work in the ocean, so as to protect it from the complex environment of the ocean and to crack down on corrosion resistance.
380 meters The world's tallest transmission tower corrosion Protection Project, is one of the important application results.
Corrosion loss, up to 3%~ of GDP 5%
When it comes to engineering corrosion, the damage may be far beyond people's imagination. Internationally, it is recognized that the damage caused by corrosion to a country is as high as 3%~ 5% of gross domestic product. According to the American Society of Corrosion Engineers, global corrosion costs are estimated at US $2.5 trillion.
In 2014, the total cost of corrosion in our industries accounted for about 3.34% of gross domestic product, totaling more than 2.1 trillion yuan. In engineering, the direct result of corrosion is to shorten the service life of engineering materials and bring about great economic loss. In environmental safety, the leakage of corrosive products or chemical substances caused by corrosion may seriously pollute water resources, atmospheric and soil resources; especially for emerging ocean engineering, Island Engineering, corrosion is more equipment, One of the important factors affecting the safety of the facility and service life.
In addition, the development of the South China Sea and the "Belt and Road" infrastructure construction is also facing a severe corrosion crisis. Zhoushan's 380 meters of the world's highest cross-sea transmission tower, transmission capacity of 2 Million-kilowatt, but its high salt fog, high humidity, strong sunshine, Typhoon environment, the average annual relative humidity of 80.3%, the average annual sunshine 1625 hours.
Effective anti-corrosion measures are the key to ensure their safe and stable transportation of energy.
Salt spray life of more than 9,000 hours, better than international first-class products The damage caused by corrosion is so great that people have been exploring ways to control corrosion, and the use of heavy-duty coatings is an important tool.
CAS Ningbo materials Xue Qunji Academician and Wang Liping researcher team, with ' graphene ' for the material development of graphene modified heavy-duty coating, and for 380 meters world's tallest transmission tower Anticorrosion project. Graphene is a carbon atom formed by the hexagonal form of a honeycomb lattice planar two-dimensional material, which is extremely tough, can be bent to a large angle without breaking, the fracture strength than the best steel is 100 times times higher. It is transparent but not breathable in visible light and has good barrier properties.
Through the introduction of graphene can enhance the adhesion of the coating, impact resistance and other mechanical properties and shielding barrier properties of the media, in particular, can significantly improve the atmospheric environment of the tropical marine coating of anti-corrosive media (water, chlorine ions, oxygen, etc.) permeability, greatly reducing the thickness of the coating film, while improving the corrosion-resistant coating life.
Photo of graphene under electron microscope Source: Lawrence Berkley National Laboratory The research and development team, Bujibin researcher, told the Liberation Daily News reporter, the traditional anti-corrosion technology galvanized coating, if the coastal or heavy industry pollution environment, generally 3-5 years will be serious corrosion. For example, Ningbo Port bridge 1237 Line 20th Tower, its galvanized layer in the run six months after the loss of luster, the surface is dark gray.
Graphene, the thinnest corrosion-resistant material, can make water penetration rate of 100,000 times times lower, copper corrosion rate decreased 4 times times, nickel corrosion rate decreased by 20 times times. The team developed the graphene heavy-duty coating has passed the Chinese Society for Corrosion and protection of the results of identification, won the 2017 China Good design silver medal. Compared to the traditional coating salt spray life generally in about 2000-3,000 hours, its salt-spray life of more than 9,000 hours, a number of key performance indicators are significantly better than the world-class products, protection life than the same time test of an international brand of paint increased 3 times times.
And this is the first time in the world to complete the graphene modified heavy-duty coating engineering chain, including material development, natural environment assessment, engineering demonstrations and even large-scale production and application. Coating of graphene heavy-duty coating.
The Interview object provides Over the next five years, the market for anti-corrosion coatings will surpass billions of dollars and market prospects can be. According to the introduction, graphene heavy anti-corrosion coating is a hot spot in the world, but the real realization of engineering application is not much. At present, the team has joined the Silver billion group to achieve the results of industrialization, related products not only in the transmission tower to obtain scale application, but also in the storage tanks, distribution network facilities, bridge engineering, ships, South China Sea marine facilities and other fields to achieve the application. "China's 2000-ton pilot large-scale offshore power generation platform, before the use of an international brand paint, less than 1 years on the rust, now with our graphene heavy anti-corrosion coating, has been more than 1 years is still intact."