Acta Phys. -Chim. Sin. ›› 2002, Vol. 18 ›› Issue (10): 934-937.doi: 10.3866/PKU.WHXB20021014
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Shao Min-Hua;Huang Ruo-Shuang;Hu Rong-Gang;Lin Chang-Jian
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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.
Key words: Al alloy, Localized corrosion, Scanning micro pH electrode, IrOx-pH electrode
Shao Min-Hua;Huang Ruo-Shuang;Hu Rong-Gang;Lin Chang-Jian. Fabrication of Composite Scanning Micro pH Electrode and Its Application in Localized Corrosion[J]. Acta Phys. -Chim. Sin. 2002, 18(10), 934-937. doi: 10.3866/PKU.WHXB20021014
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URL: https://www.whxb.pku.edu.cn/EN/10.3866/PKU.WHXB20021014
https://www.whxb.pku.edu.cn/EN/Y2002/V18/I10/934
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