金属腐蚀电化学的微机测试系统

从金属腐蚀电化学测试的特点及要求出发，用微机和普通恒电位仪组成其测试系统，通过软件设计控制计算机的D/A（数/模）转换产生所需的波形电压，代替信号发生器工作，然后用两路A/D（模/数）转换分别采集电极电流和电极电位，可以同步显示电位-电流密度关系曲线、电流密度-时间关系等腐蚀电化学参数，该电化学测试系统工作稳定，测量便捷，结果准确且造价低，已成功地应用于多种金属电化学腐蚀体系的测试。

A Microcomputer Test System Designed for Electrochemical Tests of Metal Corrosion

To meet the needs of electrochemical tests of metal corrosion, a test system is applied which consists of a microcomputer,a potentiostat and a data acquisition card together with a suitable software designed by authors in which the program is written with C language. The computer controlled by program produces output potential with given wave form from D/A transformer, playing a role of analogous potential generator. The signals of both potential and current of the testing electrode in electrolytic cell are acquired by the computer with A/D transformer. The electrochemical parameters such as polarization curve and current-time plot can timely be displayed. This electrochemical test system has some advantages stable in working, convenient to use, cheap in price and accurate in measurement. It has been successfully used in corrosion electrochemical test of many cases and is available in the electrochemical measurement of metal corrosion.