在美国加利福尼亚大学工作的英国威尔士科学家,研制成一种新型钢材。这种名为费尔马的钢材用来制作混凝土钢筋时具有很强的抗锈防腐能力,用不着涂覆防腐材料。它可以大大延长桥梁和建筑物的寿命。专家们认为,普通钢材制作钢筋时,因其里面含有极其微小的铁和碳化物指粒,当存在盐溶液时,这种指状物就会变成一种极其 British Welsh scientists working at the University of California, USA, developed a new type of steel. This type of steel, Fermat, is used to make concrete rebar with strong resistance to rust and corrosion without the need to apply anticorrosive materials. It can greatly extend the life span of bridges and buildings. Experts believe that when making ordinary steel bar, because it contains extremely small iron and carbide finger, when the existence of salt solution, this kind of finger will become an extreme