Abstract
If sea ice can remove rust layers from steel surfaces of steel structure in the winter time, larger wear rate of steel structure in ice-infested sea compared to ice-free sea must be considered in the design of steel structures. In fact, serious damage has occurred to training levees made of steel-sheet-pile-type seawalls on the Sea of Okhotsk. Sliding wear tests were conducted in a cold room to evaluate the effect of some factors (sand inclusion, contact pressure and ice temperature) on wear rate of rust layers, using two types of steel specimen with rust layers which were made both at indoor (type-1) and inside of harbor (type-2). Larger effect of sand inclusion on wear rate at the mild wear region, and larger scatter of its wear rate were obtained. And, it was obtained that wear rate of (type-1) at the mild wear region was approximately the same as that of type-2 under the conditions of no sand inclusion. Also, the applicability of Holm's equation to the evaluation of wear amount was indicated.
