几种超级不锈钢在模拟烟气脱硫环境中的缝隙腐蚀行为研究

王长罡,魏洁,魏欣,穆鑫,薛芳,董俊华,柯伟,李国平

Crevice Corrosion Behavior of Several Super Stainless Steels in a Simulated Corrosive Environment of Flue Gas Desulfurization Process

Changgang WANG,Jie WEI,Xin WEI,Xin MU,Fang XUE,Junhua DONG,Wei KE,Guoping LI

表1 4种不锈钢的合金元素成分及PREN值

Table 1 Elemental compositions and PREN values of four tested stainless steels (mass fraction / %)

Steel C Cr Ni Mn Si P S Mo N Cu Fe PREN 316 0.05 16.9 10.6 1.60 0.50 0.031 0.006 2.05 --- --- Bal. 23.665 904L 0.02 20.1 25.3 2.00 1.00 0.045 0.035 4.04 --- 1.32 Bal. 33.432 254sMo 0.02 19.7 17.8 1.00 0.80 0.03 0.01 6.20 0.19 0.75 Bal. 43.2 2507 0.03 25.4 7.01 1.00 0.80 0.035 0.020 4.20 0.27 0.50 Bal. 43.58