Only in steady state system exerts an infinitesimal sine wave disturbance corrosion monitoring system

Corrosion monitoring system for electrochemical impedance spectroscopy (EIS) is superior to the other is a characteristics of the technique of transient, simply to impose an infinitesimal in the steady state system of sine wave disturbance, for the study of thin film on the electrode, such as modified electrodes and electrochemical deposited film field study is very important, because this kind of measurement does not lead to large changes in membrane structure. In addition, the application of EIS wide frequency (10-2-105 Hz), at the same time of measuring electrode process kinetics and mass transfer parameters, and through detailed theoretical model or equivalent circuit of the experience, which is the ideal element (such as resistance and capacitance, etc.) to represent the system in the process of Faraday, space charge and electrons and ions in the transmission process, that are not normally distribution the microscopic properties of matter, therefore, the electrochemical system and corrosion EIS has become a research system of a kind of effective method. Since the Bard for the first time in 1982 to the introduction of the EIS research field of conductive polymer, many scholars EIS was applied to all kinds of conductive polymer system extensively studied. For high resistance electrolyte and a wide range of many medium conditions of the technology have greater reliability. In a wider frequency range measuring ac impedance need time is very long, so it is difficult to achieve real-time monitoring of the corrosion rate and corrosion monitoring is not suitable for the actual scene. In order to overcome this shortcoming, people for most of the impedance characteristics of corrosion system, through the selection of appropriate two frequency, monitoring the corrosion rate of metals, the design and manufacture of automatic ac corrosion monitor.

Corrosion monitoring system compared with conventional wear measurement method, thin layer activation method is contact condition remote monitoring wear, corrosion and erosion on the surface of the material such as denudation, does not need to remove the parts, can be wear online measurement; Can simultaneously measure the wear on the surface of the several parts in a machine; The method is of high sensitivity, with concentration measurement can reach 10-19, thin layer differential method can reach 015} tm: activation area is small, the activation depth is generally not more than 200} tm, activity is very low, when use the TVC under the provisions of the state; In addition the method by cost lower than conventional methods, test time significantly shortened, cost effectiveness more reasonable from 2 in the -170 s, the United States, Britain, Germany, Japan and other developed countries has further the development of the technology of TLA and succeeded in the popularization and application in the field of business, at the same time, developing countries are also introduced the technique in the laboratory study of corrosion wear. Thin layer activation technique in measuring and testing due to wear or corrosion material peeling off is a very effective technique. As on-line corrosion monitoring technology, TLA is able to run on industrial equipment to provide reliable wear or corrosion evaluation, which help to increase the service life of all kinds of machinery, equipment, technology and reliability. Work is an important aspect in the future for the industry to further understand the thin layer activation method is a safe, accurate, real-time, fast, cost effectiveness and reasonable measuring method, the method can solve the long-standing their wear corrosion problems, make its produce reasonable structure, safety, long service life of industrial products.