According to a recent report by the Physicist Organization Network, scientists at the University of Buffalo in the United States have made significant progress in anti-rust technology. By using a graphene-based composite, they have been able to keep ordinary steel immersed in concentrated brine for up to a month without rusting. Graphene is a two-dimensional material composed of a single layer of carbon atoms and a hexagonal honeycomb structure. It is the thinnest and hardest material known to man. Researchers speculate that the hydrophobicity and electrical conductivity of this material may be the key to its long-term rust prevention. This property of graphene prevents corrosion of the material by water and retards the electrochemical reaction of iron, which converts iron into iron oxide to rust. In the first experiment, the researchers placed steel with this material in concentrated brine, but the steel rusted after only a few days. The researchers then adjusted the concentration of graphene in the composite and the ratio of other materials. The treated steel was continuously soaked in concentrated brine for one month without rusting. Researchers say that because of the harsh environment in the real world, the corrosion resistance of steel treated with this technology will be much better than that in concentrated brine during normal use. The Buffalo University chemists Sabatchine Banerjee and Robert Dennis, who led the project, said the technology is based on environmental protection and low investment. Currently in the metallurgical industry, in order to improve the corrosion resistance and durability of materials, a toxic substance, hexavalent chromium, is often used. This kind of material is extremely dangerous after being discharged into the environment through waste water and waste gas. It can invade the human body through the digestive tract, respiratory tract, skin and mucous membrane. The non-toxic graphene composite material can completely replace it. In addition, the technology can directly use existing chrome plating equipment in most of the current plants without having to upgrade the original equipment, which reduces the cost to a certain extent. Researchers say they have applied for patents on the technology and the development and application of related technologies are gradually being developed.
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