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最近日本NKK公司开发了在含盐分多的海岸地区无涂层也可使用的耐大气腐蚀钢，该产品的成分特点是添加1．5％Ni、0．3％M。。这种新的产品已在日本新泻县和三重县的公路桥上被采用。传统的耐大气腐蚀钢在含盐分多的环境中使用，氯离子通过钢材表面的锈层并浓缩，不能防止腐蚀的
Recently, NKK Japan developed an uncoated, weather-resistant steel that can be used on a salt-rich coastal area. The composition of this product is characterized by the addition of 1.5% Ni and 0.3% M. . This new product has been adopted on the highway bridges in Niigata prefecture and Mie prefecture in Japan. Conventional atmospheric corrosion resistant steel is used in environments that contain too much salt. Chloride ions pass through the rust layer on the surface of the steel and are concentrated to prevent corrosion