This standard is part of the ISO 12944 series and deals primarily with the performance requirements of Coating systems for corrosion protection at sea and related structures. The standard emphasizes high durability Coating systems for steel structures to reduce maintenance costs and reduce environmental impact. Documentation includes performance testing methods for Coating systems, laboratory performance tests, and requirements and standards for Coating systems. In addition, the standard also considers general statements on safety, environmental protection, etc., and provides terms and definitions. The purpose of the entire standard is to provide detailed guidance on the selection and application of Coating systems to ensure that steel structures are effectively protected against corrosion damage during their service life.