DEVELOPMENT OF HIGH-QUALITY ENGINEERING MODELS FOR MARINE COASTAL ZONE CORROSION OF STRUCTURAL STEELS
The corrosion of structural steels in the hostile environments of the coastal, harbour or ocean zones is of considerable economic interest. Corrosion protection such as protective coatings or cathodic protection typically has a limited life and once it is lost (or when it was not provided). it is desirable to be able to predict the likely amount of corrosion loss that will occur at a given location for given periods of exposure. The prediction of corrosion loss (thickness reduction) is important for structural safety estimation while prediction of pitting depth is critical where fluid containment or wall thickness penetration is of interest. This paper provides an overview of recent research to develop high quality engineering models for the prediction of the corrosion of structural steels in the coastal environment. Unlike previous models, the new models developed in recent years are underpinned by theoretical electro-chemical or diffusion-process fundamentals. Moreover, they consider the important influence of bacterial processes, particularly those influencing long-term corrosion. Compared with older models the new models show considerably less uncertainty when fitted to observed data. Moreover, there is a strong continuity in the corrosion behaviour as exposure changes from immersion, tidal, splash to coastal atmospheric zone conditions.
Robert E. Melchers
Centre for Infrastructure Performance and Reliability, The University of Newcastle, Australia
国际会议
长沙
英文
46-55
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）