The temperature dependence on radiation induced surface activation (RISA) corrosion control effect for stainless steel was examined in artificial and natural seawater in this paper. The results obtained are as follows: 1) The RISA effect was evident up to 30 °C, but was hardly recognizable over 45 °C. 2) The RISA effect was observed regardless of the seasons, and the anodic current decreased with increase in the temperature. 3) It was confirmed that corrosion control mechanism proposed in the previous paper was appropriate. The increase of dissolved oxygen was measured in natural seawater by the appearance of RISA effect.
