For ship and offshore structures, corrosion and its prevention are a major concern. Corrosion prevention costs relate to exposure conditions, planned inspection and maintenance, design of structural details, protection specification, etc. The cost of initial corrosion protection is influenced by the steelwork details but more and more the maintenance costs and the corrosion protection system performances can be significantly affected. It is therefore easier and more cost-effective to design the structure to fit the protection method rather than to undertake late countermeasures against corrosion.
Good design of structures should account for eliminating corners and sharp notches, avoiding standing water and dirt or inaccessible areas, allowing drainage, providing safe and easy access to and around the structure so facilitating inspections and coating applications, and providing adequate corrosion margins, etc. On the other hand, the choice of the corrosion protection system should match the features of the structure to be protected accounting for its effective and economical maintenance.