It has been reported that tungsten oxide coating can make steel stronger and more durable. It means that the steel covering with tungsten oxide coating has better corrosion prevention. And the tungsten oxide surface coating is more durable than any anti-fouling material that has been developed before.
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Some researchers tested the durability of tungsten oxide coating by scratching with stainless steel tweezers, diamond-tipped scribers, screwdrivers and beating it hard, heavy beads. They also tested the anti-wetting properties by soaking the metals on various liquids like oil, water, blood and corrosive chemicals. And it was found that the coating not only withstood all these tests but make steel stronger compared to the uncoated ones. As rough texture often required to resist fouling makes coated metals weaker, the concept of combining durability and anti-fouling properties in a coating was not as successfully made into reality until now, said the researchers. And the researchers made this possible by making an ultrathin film of thousands of small tungsten oxide islands to directly coat the steel surface. If one part of one island is destroyed, the damage does not spread to the other islands due to the lack of connection among them. This helps the coating retain its repelling properties while helping the steel improve its durability.
