| 复合型扫描微pH电极及其在局部腐蚀中的应用 |
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| 引用本文： | 邵敏华,黄若双,胡融刚,林昌健. 复合型扫描微pH电极及其在局部腐蚀中的应用[J]. 物理化学学报, 2002, 18(10): 934-937. DOI: 10.3866/PKU.WHXB20021014 |
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| 作者姓名： | 邵敏华 黄若双 胡融刚 林昌健 |
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| 作者单位： | State Key Laboratory of Physical Chemistry for Solid Surfaces, Department of Chemistry, Department of Materials Science and Engineering, Xiamen University, Xiamen 361005 |
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| 基金项目： | 国家自然科学基金（59871043）资助项目 |
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| 摘 要： | 研制了一种新型的微米级复合型扫描pH探针.该探针具有体积小、响应速度快、稳定性好和制作方便等优点，能很好地满足微区pH快速测定的要求.应用复合型扫描微pH电极技术研究了Al/Cu合金在0.01 mol•L－1 NaCl溶液中开路状态下局部腐蚀发生的早期过程.
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| 关 键 词： | Al合金 局部腐蚀 扫描微pH电极 IrOx-pH电极 |
| 收稿时间： | 2002-01-31 |
| 修稿时间： | 2002-03-27 |
Fabrication of Combination Scanning Micro pH Electrode and ItsApplication in Localized Corrosion |
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| Shao Min-Hua Huang Ruo-Shuang Hu Rong-Gang Lin Chang-Jian. Fabrication of Combination Scanning Micro pH Electrode and ItsApplication in Localized Corrosion[J]. Acta Physico-Chimica Sinica, 2002, 18(10): 934-937. DOI: 10.3866/PKU.WHXB20021014 |
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| Authors: | Shao Min-Hua Huang Ruo-Shuang Hu Rong-Gang Lin Chang-Jian |
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| Affiliation: | State Key Laboratory of Physical Chemistry for Solid Surfaces, Department of Chemistry, Department of Materials Science and Engineering, Xiamen University, Xiamen 361005 |
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| Abstract: | A novel composite scanning micro pH electrode was fabricated. The IrOx-pH electrode produced in a carbonate melts exhibited high stability, a fast potential response and ideal Nernstian response. The slope of the electrode at 15 ℃ was 56.8 mV/pH, which was very close to the theoretical value. The 90％ potential response time for a pH change from 1.75 to 13.90 was less than 0.5 s. The composite scanning micro pH electrode is a promising apparatus for detecting the pH distribution on metal/solution interface. pH image on the surface of Al/Cu galvanic couple showed that both the anodic and cathodic areas could be sensed well. Localized corrosion took place on the interface of Al/Cu couple. The localized corrosion developed with time and pH value around the pitting decreased gradually. |
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| Keywords: | Al alloy Localized corrosion Scanning micro pH electrode IrOx-pH electrode |
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