The short-term corrosion behavior of CLAM steel TIG weldment in liquid lead bismuth eutectic

The corrosion behavior of China Low Activation Martensitic (CLAM) steel TIG weldment(weld zone and heat affected zone)in stagnant lead bismuth eutectic saturated by oxygen at 500 was studied in this paper. The corrosion time of as-welded CLAM steel was 200 and 400 h, while the as-tempered CLAM steel was exposed for 400 h. The results show that dissolution of steel components was observed. A protective double layer oxide film which consists of a loose and porous Fe3O4 outer layer and a dense Fe-Cr spinel inner layer was formed on surface of all the samples. No penetration of Pb, Bi into the matrix was found. The post-weld tempering process can improve corrosion resistance effectively. The corrosion resistance of heat affected zone was superior to weld zone. ©, 2015, Journal of Functional Materials. All right reserved.