IrO2-pH微电极的研制及钢筋/混凝土界面pH的测量

采用电化学阳极氧化和高温碳酸盐氧化两种方法制备 IrO2-pH微电极，其特点是对氢离子响应快、线性范围宽、机械性能好、具有长期稳定性 .考察了该电极的pH响应特性、化学成分、机械性能等.结果表明，这种IrO2-pH微电极 适用于钢筋/混凝土界面pH值的原位测量.     

Investigation of Formation and Inhibition Mechanism of Cerium Conversion Films on Al 2024 Alloy

To study the mechanism of formation and inhibition of Ce conversion films on A1 2024-T3 alloy, scanning microreference electrode technique (SMRE) is used to probe the potential map on A1 2024-T3 in CeC13 solution, the localized corrosion of A1 alloy decreases with immersion time and disappears finally, which results from the competition of Cl^- aggression and Ce^3 inhibition on alloy surface. The results of X-ray photoelectron spectroscopy (XPS) indicate that the Ce conversion films consist of Al2O3, CeO2 and Ce2O3 (Ce(OH)3), and CeO2/Ce2O3 ratio decreases with the immersion time. When a critical pH for Ce(OH)3 formation was reached, Ce(OH)3 will precipitate on the micro cathodic area on alloy surface. Consequently, H2O2, the product of the catholic reaction will oxidize a part of Ce(OH)3 to CeO2, which appears a better corrosion resistance for Al alloys.     

钢筋混凝土结构中阴极保护技术的应用现状及研究进展

综述了电化学阴极保护在混凝土中钢筋防腐蚀的应用及其进展，着重评述了外加电流阴极保护法中阳极系统的应用现状及研究方向。