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文摘
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利用动电位极化曲线和交流阻抗谱等电化学测量技术研究了Q235钢表面原位生长的α-FeOOH膜在0.25mol/L Na_2SO_4+10~(-4)mol/L NaCl、0.25 mol/L Na_2SO_4+10~(-3)mol/L NaCl、0.25 mol/L Na_2SO_4+10~(-2)mol/L NaCl水溶液中的电化学性能.在不同浓度的Cl~-溶液中α-FeOOH膜对侵蚀性离子的作用机制.结果表明,Q235钢表面原位生长的α-FeOOH膜在10~(-4)mol/L到10~(-2)mol/LCl~-浓度范围内,对基材均无保护作用;但当Cl~-含量为10~(-2)mol/L时,α-FeOOH膜的膜电阻及转移电阻皆比低氯离子浓度的要大,此时α-FeOOH膜表现出一定的抗腐蚀能力. |
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其他语种文摘
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In this paper,the electrochemical characteristics of an in-situ formed α-FeOOH film on Q235 steel have been investigated by means of potentiodynamic polarization and EIS measurements in several Cl~- containing solutions such as 0.25 mol/LNa_2SO_4 + 10~(-4) mol/LNaCl,0.25 mol/LNa_2SO_4 + 10~(-3) mol/ LNaCl and 0.25 mol/LNa_2SO_4 + 10~(-2) mol/L NaCl. The results indicate that the α-FeOOH film formed in situ on Q235 provides no protectiveness to the steel substrate in a solution with 10~(-4) mol/L Cl~-. When the Cl~- concentration reached to 10~(-2) mol/L, the R_(film) and R_t of the in-situ formed α-FeOOH film on Q235 were larger than those in solutions with lower Cl~- concentration, in such case the film shows protectiveness to the substrate steel to some extent. |
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来源
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腐蚀科学与防护技术
,2009,21(2):131-133 【核心库】
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关键词
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α-FeOOH锈膜
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Cl~-浓度
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原位生长
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保护性能
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地址
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1.
东北大学 理学院, 辽宁, 沈阳, 110004
2.
中国科学院金属研究所, 金属腐蚀与防护国家重点实验室, 辽宁, 沈阳, 110016
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1002-6495 |
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学科
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金属学与金属工艺 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:3581893
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