| 硫酸根浓度对X70钢在卵石黄泥土中腐蚀行为的影响 |
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| 引用本文： | 费小丹,李明齐,蔡铎昌.硫酸根浓度对X70钢在卵石黄泥土中腐蚀行为的影响[J].腐蚀与防护,2009(8). |
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| 作者姓名： | 费小丹 李明齐 蔡铎昌 |
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| 作者单位： | 西南科技大学国防科技学院;西华师范大学化学化工学院; |
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| 基金项目： | 四川省科技厅重点资助项目(O4JY029-100) |
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| 摘 要： | 利用极化曲线法、电化学阻抗法和扫描电镜研究了硫酸根浓度对X70钢在卵石黄泥土中腐蚀行为的影响。结果表明,在不同硫酸根浓度的卵石黄泥土中,随着硫酸根浓度的增大,X70钢的自腐蚀电位负移,自腐蚀电流密度增大。交流阻抗谱表现为叠加的双容抗弧,弧半径随硫酸根浓度的增大而减小。X70钢在加入0.5%硫酸根的土壤中发生较严重的坑点腐蚀。
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| 关 键 词： | X70钢 卵石黄泥土 硫酸根 电化学阻抗谱 极化曲线 |
Influence of SO_4~(2-) Content on Corrosion Behavior of X70 Steel in Yellow Pebble Soil |
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| FEI Xiao-dan,LI Ming-qi,CAI Duo-chang.Influence of SO_4~(2-) Content on Corrosion Behavior of X70 Steel in Yellow Pebble Soil[J].Corrosion & Protection,2009(8). |
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| Authors: | FEI Xiao-dan LI Ming-qi CAI Duo-chang |
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| Affiliation: | 1.South West University of Science and Technology;Mianyang 621010;China;2.China West Normal University;Nanchong 637002;China |
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| Abstract: | Influence of SO2-4 content on corrosion behavior of X70 steel in yellow pebble soil was studied by means of polarization curves,EIS and SEM.The results showed that with the increase of SO2-4 content,Ecorr shifted negatively and icorr increased.The Nyquist diagram was composed of two capacitive arcs.The radius of the arc became smaller with the increase of SO2-4 content.X70 steel in soil with 0.5% SO2-4 suffered severe pitting corrosion. |
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| Keywords: | X70 steel yellow pebble soil SO2-4 EIS polarization curve |
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