THE EFFECT OF OXYGEN IMPURITIES ON THE BEHAVIOUR OF TYPE 316 STAINLESS STEEL IN PB-17LI
Corrosion tests carried out in Pb-17Li, with and without added oxygen, have shown that oxygen enhances the corrosion of 316 steel by increasing the depth of the ferritic corrosion layer and the extent of chromium depletion within the layer. Tests using lithium lead alloys with compositions between Pb-17Li and Pb-11Li and in pure Pb showed no change in the depth of the ferritic zone with composition of the alloys but a significant increase for pure lead. Measurements of the solubility of nickel in Pb-17Li and Pb-10Li showed the solubility to be similar for both compositions and to be much less than that previously measured in pure Pb. The solubility may be expressed by the equations: log-10S (wppm) = 4.832 - 981.2/T(K) for Pb-17Li log-10S (wppm) = 5.148 - 1162/T(K) for Pb-10Li The increase in ferrite zone formation, in the presence of oxygen, cannot, therefore, be due to increased Ni solubility caused by a change in composition of the alloy. A study of the reactions of oxides with Pb-17Li has shown that Cr may interact with oxygen to form ternary oxide LiCrO-2.
Bibliographic Reference: THIRD INTERNATIONAL CONFERENCE ON FUSION REACTOR MATERIALS, KARLSRUHE (GERMANY), OCT. 4-8, 1987 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 33532 ORA
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Record Number: 1989126035901 / Last updated on: 1989-01-01
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