ISO 1 2944.2 - 2 017 "Corrosion protection of steel structures by Paints and varnish protective coatings systems, Part 2: environment classification" describes in detail the different effects of atmosphere, water and soil on corrosion of steel structures. This standard provides a method for assessing the corrosion rate of steel structures in various environments, based on the corrosion classification system, covering structures exposed to the atmosphere, immersed in water or buried in soil. The standard emphasizes the importance of selecting an appropriate protective coatings system to ensure that structures are protected from corrosion for the life of their design. In addition, updated normative references and technical revisions are introduced to provide guidance on the selection and application of Coatings systems.