Garbatov, Y. and Guedes Soares, C. (2018), “Corrosion margins for redundant ship structures”, Proceedings of the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2018), 17-22 June, Madrid, Spain

The work presented here analyses the structural corrosion degradation of two sets of corrosion depth measurements collected with one-decade difference. The corrosion degradation process is associated to a first order system, subjected to a sudden disturbance, where a step function is used to define the input signal and the solution of the differential equation of this system leads to the exponential corrosion degradation model as developed earlier. Corrosion wastage of redundant structures with serious consequences of failure are derived and several conclusions related to the new trend in the ageing corrosion structures are presented and discussed. Partial safety factors with respect to corrosion environment and corrosion additions are developed that can be used in the design, avoiding a complex probabilistic analysis.

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