Holographic interferometry, an electromagnetic method, was used to study corrosion of carbon steel, aluminum and copper nickel alloys in NaOH, KCl and H2SO4 respectively. The technique, called electrochemical emission spectroscopy, consisted of in-situ monitoring of changes in the number of fringe evolutions during the corrosion process. It allowed a detailed picture of anodic dissolution rate changes of alloys. The results were compared to common corrosion measurement methods such as linear polarization resistance and electrochemical impedance spectroscopy. A good agreement between both data was found thus indicating that holographic interferometry can be a very powerful technique for in-situ corrosion monitoring.

Subject
Corrosion currents, Corrosion rate, Aluminum, Spectroscopy, Interferometry, Aqueous solutions, Density, Linear polarization, Copper nickel alloys, Potassium chloride, Carbon steel, Aluminum alloys, Electrical interference
Keywords:
Holographic Imerferometry, Electrochemical Impedance (E.I) spectroscopy, Electrochemical-Emission Spectroscopy, linear Polarization, Corrosion, He Ne Laser Light
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2003
Association for Materials Protection and Performance (AMPP)
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