微型计算机的应用和测量仪器的智能化、模块化在腐蚀电化学领域产生了强有力的影响。尤其在以数据量大、快速为特点的暂态测量领域更是如此。本文在A. K. Sleigh和W. R. McKinnon研究锂电池的工作基础上，从断电流后体系电位响应出发，明确地推导出从-t.dV/dt～log_(10)(t)图中初步判断体系的时间常数个数和弛豫过程类型的数据判断处理方法。为了验证这一数据处理方法，在实验装置上，采用通用RS－232C串行接口总线连接技术和通用并行接口（GPIB）IEEE－488总线连接技术先后建立了二套电化学暂态测量系统。并用它们确定了一些等新电路和具体腐蚀体系的时间常数个数和弛豫过程的类型。进而研究了孔蚀电极的时间常数个数及弛豫过程类型与腐蚀状态的相关性。测量系统的软件分别APPLESOFT BASIC和高级BASICA语言编制。断电流分析测量技术，方便地确定体系的时间常数个数和弛豫过程类型，为电化学阻抗谱解析提供了基础工作。因此该方法与电化学阻抗谱结合，可望成为提取电极过程动力学参数的重要方法。
其他摘要
Application of microcomputer and appearance of modular intelligent measurement instruments have great effects on corrosion electrochemistry, especially in the region of transient measurement, whose characteristic is high- speed and having a large number of data. On the basis of work of A. K. Sleigh and W. R. McKinnon, a principle was proposed to determine the number of time-constant of the relaxation process preliminary, based on analysing the decay data by plots of -t.dV/dt vs. log_(10)(t). In order to verify it, We established two new transient measurement systems, one of which is composed of APPLE IIe microcomputer and IEEE- 488 (GPIB) programmable signal recorders, the other of which consists of PC/XT compatible microcomputer and Nicolet 4094B digital oscilloscope with RS-232 C serial port Potential decay after interruption of the current in galvanostatic polarization was measured and analysed for passivated metallic electrode during pitting corrosion. The experimental results for the systems of passivated mild steel and stainless steel electrode in chloride solution are agreement with that obtained by impedance measurements reported previously. The softwares were developed with APPLESOFT BASIC and high level BASICA language.
修改评论