低合金钢和碳钢在90 ℃地下水模拟溶液中的缝隙腐蚀*
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徐秋发, 庞晓露, 刘泉林, 高克玮
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CREVICE CORROSION OF LOW ALLOY STEEL AND CARBON STEEL IN THE SIMULATED GROUNDWATER AT 90 ℃
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XU Qiufa, PANG Xiaolu, LIU Quanlin, GAO Kewei
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| 表 3 2种钢在不同pH值的地下水溶液中的动电位极化结果 |
| Table 3 Potentiodynamic polarization test results of the two steels in the deaerated groundwater with different pH |
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| pH value | Steel | Ecorr / V | icorr / (mA·cm-2) | ba / (V·d-1) | bc / (V·d-1) | Rp / (Ω·cm-2) | Corrosion rate / (mm·a-1) | | 7.2 | Q235 | -0.718±0.009 | 0.0471±0.004 | 0.103±0.009 | 0.285±0.04 | 699±53 | 0.0286±0.02 | | | Corten A | -0.747±0.009 | 0.0437±0.009 | 0.129±0.001 | 0.237±0.05 | 832±88 | 0.0240±0.003 | | 2.5 | Q235 | -0.612±0.02 | 1.450±0.4 | 0.318±0.03 | 0.349±0.1 | 52±17 | 0.414±0.12 | | | Corten A | -0.599±0.01 | 0.913±0.2 | 0.276±0.04 | 0.281±0.02 | 68±13 | 0.301±0.06 | | 1.0 | Q235 | -0.512±0.01 | 1.820±0.5 | 0.306±0.03 | 0.340±0.05 | 39±6 | 0.515±0.08 | | | Corten A | -0.539±0.01 | 2.130±0.2 | 0.388±0.08 | 0.355±0.08 | 37±3 | 0.544±0.05 |
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