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The pitting corrosion behavior of super 13Cr stainless steel was studied by electrochemical test and chemical immersion methods ,and the pitting morphology was investigated by SEM.The results showed that there was a difference of 4℃ in the critical pitting temperatures of the super 13Cr stainless steel determined by electrochemical and chemical immersion methods respectively.Due to the promotion function of strong oxidation of FeCl3 in chemical immersion, chemical immersion appraisal was suitable mainly for comparing the pitting performance of several materials, whereas the electrochemical test could further describe the critical condition of pitting.Unstable pitting with a diameter less than 30μm was formed on material surface just below the CPT,while stable pits could only be formed above the CPT.