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首页> 外文期刊>Corrosion Science >A CONTACT ELECTRORESISTANCE METHOD FOR IN SITU INVESTIGATION OF METAL SURFACE IN ELECTROLYTES AND SOME NEW POSSIBILITIES IN CORROSION AND ELECTROCHEMICAL STUDIES
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A CONTACT ELECTRORESISTANCE METHOD FOR IN SITU INVESTIGATION OF METAL SURFACE IN ELECTROLYTES AND SOME NEW POSSIBILITIES IN CORROSION AND ELECTROCHEMICAL STUDIES

机译：接触电阻法用于电解质中金属表面的原位研究以及在腐蚀和电化学研究中的一些新可能性

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摘要

A new method is developed for studying in situ the electroresistance of films on metals and its dependence upon the electrolyte composition and potential. The method consists of measuring the contact electroresistance between two identical metallic specimens, periodically contacted in electrolyte under potentiostatic control, in particular, between the walls of a fatigue crack in a sample cyclically loaded below the corrosion fatigue crack growth threshold. The sensitivity of the method is 10~(-9) Ω and it can be used for all conducting materials in any electrolyte at ambient and high temperatures and pressures in a wide region of potentials including the potentials of intensive evolution of hydrogen or oxygen. The method allows the electroresistance of films on metals to be determined at very early stages of water and anion adsorption, formation and destruction of hydride and oxide films, electrochemical incorporation of cations, electrodeposition of metals and to study the kinetics of these processes. The water adsorption potentials meant to characterize quantitatively the hydrophility of metals have been specified for 16 metals.
机译：开发了一种新方法，用于原位研究金属上薄膜的电阻及其对电解质成分和电势的依赖性。该方法包括测量在恒电位控制下周期性地接触电解质的两个相同金属样品之间的接触电阻，特别是循环加载低于腐蚀疲劳裂纹增长阈值的样品中疲劳裂纹的壁之间的接触电阻。该方法的灵敏度为10〜（-9）Ω，可用于环境温度，高温和高压下任何电解质中的所有导电材料，其电位范围很广，包括氢或氧的强烈释放。该方法允许在水和阴离子的吸附，氢化物和氧化物膜的形成和破坏，阳离子的电化学结合，金属的电沉积的非常早期阶段确定金属膜的电阻率，并研究这些过程的动力学。已经针对16种金属指定了用于定量表征金属亲水性的吸水潜力。

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