Abstract
In this study, we focused on the corrosive wear, assuming that the frequent removal of rust layers by sea ice friction may accelerate corrosion. We performed simple experiments on repeated removal of rust layers on a metal material surface by an artificial method to simulate the rust removal caused by friction with sea ice, and developed a simple calculation model for corrosion progression based on diffusion-controlled process of oxygen under the formation of corrosion film. We found that structural steel further corroded with an increase of the removal frequency of corrosion film, and that corrosion progression did not depend on hysteresis and previous removal frequencies of corrosion film, provided each exposure time under the formation of corrosion film is the same. The calculation model showed that corrosion progresses linearly with a square root of time, and also agreed with such experimental trends. Tangent line of the progress curve of corrosion at the time of zero by the model also agreed well with the experimental results with high removal frequencies, which indicates the validity of the model. We demonstrated conceptually corrosion processes depending on contact frequencies of sea ice with steel structure, and added considerations for practical applications.
