|
Information-Optical 3D-Techniques for Corrosion Monitoring V. A. Kotenev Institute of Physical Chemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 119991 Russia Received December 20, 2003 Abstract — Methodical basis of using information-optical 3D-techniques and computer optical video microprobes in a high-performance monitoring of the thickness, topography, and statistical properties of thin corrosion layers on microscopic surface areas of a metal or semiconductor is considered. Forming a microscopic video image of such an area of an electrode and measuring the intensity distribution of the reflected optical signal in its field, one can obtain a 3D relief-map of the thickness and other properties of islets, new phase nuclei, and secondarily deposited layers on the electrode area in real time. The possibilities of combining the scanning and reflectometric 3D video microprobe techniques, diffuse-reflection infrared spectroscopy with a sharply focused probing beam, as well as photo-EMF technique, ellipsometry, and electrochemical methods when studying the corrosion behavior of metals and alloys, enable one to monitor the nonuniformity of the thickness and chemical composition of the corrosion layers. The information-optical 3D techniques of treating the images provides highly informative monitoring of the nonuniformity degree of the thickness, defectiveness, and chemical composition of the layer on the whole studied microscopic surface area of a corroded metal.
|