表面划伤对690TT合金传热管腐蚀行为的影响

孟凡江, 吴斌, 吕云鹤, 明洪亮, 鲍一晨, 王俭秋, 韩恩厚

Effect of Surface Scratch on Corrosion Behavior of Alloy 690TT Heat Exchanger Tubes

MENG Fanjiang, WU Bin, LV Yunhe, MING Hongliang, BAO Yichen, WANG Jianqiu, HAN En-Hou

表2 不同划伤深度试样腐蚀2000 h后划伤区截面裂纹的统计结果

Table 2 Information of cracks on the cross-sections of samples with different scratch depths (including parallel samples) after 2000 h corrosion test

Depth /μm Parallel samples Left bank Groove Right bank Number Sum Length /μm Number Sum Length /μm Number Sum Length /μm 30 1# 0 2 0 0 0 0 0 0 0 2# 2 8.3/12.15 0 0 0 0 3# 0 0 0 0 0 0 70 1# 0 3 0 0 0 0 0 1 0 2# 2 4.98/13.3 0 0 0 0 3# 1 10.4 0 0 1 6.88 110 1# 1 3 15.4 0 0 0 0 3 0 2# 1 9.08 0 0 1 7.49 3# 1 13.7 0 0 2 51.1/7.69