抄録
It was verified that anodic polarization method is suitable to evaluate the sensitization degree of the stainless steel at passive region. Heat treated weldment and parent metal is more sensitized compared with the weldment and parent metal. Specially, heat treated weldment at 730℃, 4 hr holding time and cooling in furnace is most sensitized. Unstable passive film for the heated treated weldment was formed because of the Cr depleted zone at passive region. In case of the parent metal, time to failure in synthetic seawater is longer than that in air. However, time to failure for the weldment and heat treated weldment in synthetic seawater is shorter than that in air. In case of the heat treated weldment, corrosive damage is the most greatest among other specimens.
