ISO 11303给出了金属和合金大气腐蚀防护方法的选择指南。适用于在大气条件下使用的由结构金属制成的技术设备和产品。在合理选择防护方法时，大气环境的腐蚀性是重要因素之一。这些指南使用ISO 9223中定义的大气腐蚀性分类。

ISO 11303 gives guidance on the selection of methods of protection against atmospheric corrosion of metals and alloys. It is applicable for technical equipment and products made of structural metals and used under atmospheric conditions. In a rational selection of protection methods, the corrosivity of the atmospheric environments is one of the important factors. These guidelines use the atmospheric corrosivity classification defined in ISO 9223.