Corrosion behavior of materials in liquid Pb-Bi eutectic

The mechanism, influence factors and protection techniques of the materials corrosion in liquid Pb-Bi eutectic are summarized in the paper. The main corrosion mechanism is: 1) the dissolution and mass transfer of the composition elements of the materials in liquid Pb-Bi eutectic; 2) the chemical reaction between the composition elements and oxygen in Pb-Bi eutectic; 3) the intergranular boundary brittle resulting from the Pb-Bi penetration along the intergranular boundary of the materials. The influence factors are as following: 1) the temperature and the temperature differential in the system; 2) the oxygen content or oxygen part pressure in the system; 3) the chemical composition of the materials; 4) the velocity of the Pb-Bi eutectic. the controlling and measurement of the oxygen content in Pb-Bi eutectic is a key technique for the prevention of the materials corrosion. Moreover, the treatment and modified of the materials surface will also have a good prospect for the prevention of the materials corrosion in Pb-Bi eutectic