蒸汽锅炉与蒸汽管路异种金属焊接的腐蚀机理研究

郑彬彬, 周宇航, 朱琦, 张涛, 王福会

Research on Corrosion Mechanisms of Dissimilar Metal Welding in Steam Boilers and Steam Pipelines

ZHENG Binbin, ZHOU Yuhang, ZHU Qi, ZHANG Tao, WANG Fuhui

表2 20#/20#钢和20#/316L钢焊接接头腐蚀速率

Table 2 Corrosion rate of 20#/20# steel welded joint and 20#/316L steel welded joint

Test number A (temperature) B (phosphates) C (sulfite) Vcorr (20#/20# steel) / mm·a-1 Vcorr (20#/316 steel) / mm·a-1 1 +1 +1 +1 0.39 0.48 2 +1 +1 -1 0.44 0.69 3 +1 -1 +1 0.18 0.25 4 +1 -1 -1 0.31 0.56 5 -1 +1 +1 0.058 0.097 6 -1 +1 -1 0.065 0.11 7 -1 -1 +1 0.043 0.064 8 -1 -1 -1 0.053 0.071