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Electrodes System for Electrochemical Noise Measurement of Metal Corrosion and Its Application

Author: XiongQi
Tutor: SongShiZhe
School: Tianjin University
Course: Materials Science
Keywords: Electrochemical noise Electrode system Stress corrosion cracking Seawater corrosion
CLC: TG171
Type: Master's thesis
Year: 2008
Downloads: 256
Quote: 4
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Abstract


In recent years , electrochemical noise measurements in experimental techniques and data analysis has been developed rapidly. Through the electrode system designed to make it suitable for nuclear structural materials to stress corrosion cracking the site supervisors detection as well as the marine environment corrosion of metallic materials detection , to expand the range of applications of electrochemical noise measurement technology , has a practical significance . Alternate selection of the six kinds of electrodes , the work that must be met by the dissimilar materials ZRA mode noise measuring electrode - the ratio of the electrode area is determined by experiments , for the scene environment produced applies the reference electrode , the establishment of the dissimilar materials ZRA mode noise measurement electrode system. The electrode system for electrochemical noise measurement of the C-ring stress corrosion specimens . The results show that the sharp transient peaks through time-domain spectroscopy , the degree of non-uniformity of the noise signal , the potential PSD spectra in the high-frequency linear segments slope value of K , and the the incident frequency fn parameters distinguish between material surface corrosion state ; observed : put the room temperature 0.5mol/LNa2S2O3 solution within a few hours , the sensitized state stainless steel C-ring specimen potential experienced suddenly decreased to reach a stable process , at the same time show a certain tendency to localized corrosion . In addition, the full immersion of the marine environment , and tidal zone of low carbon steel alloy steel corrosion electrochemical noise detection , the parameters obtained by the data analysis of Q235 carbon steel 16Mn specimens in Zhoushan waters full immersion and tidal zone uniform The corrosion of the main description of electrochemical noise technique used in marine corrosion of metallic materials on-site detection is feasible . The results show that the electrochemical noise measurement electrodes to establish the advantages and reliability of the system , laid the foundation for the electrochemical noise technique is applied to the two - site corrosion monitoring detection .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metal corrosion protection,metal surface treatment > Theory of metal corrosion
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