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02196 OPTICAL INTERFEROMETRY AS ELECTROCHEMICAL EMISSION SPECTROSCOPY OF COPPER ALLOYS IN SEAWATER

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Product Number: 51300-02196-SG
ISBN: 02196 2002 CP
Author: K.Habib and H.AI-Mazeedi
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In the present investigation, holographic interferometry was utilized for the first time to determine the rate change of the number of the fiinge evolutions durhlg the corrosion test of a pure copper, 99% Cu, and an aluminium brass, 76% Cu+22% Ni+2%Al, in natural seawater. In other words, the anodic dissolution behaviors (corrosion) of the pure copper and the aluminium brass were determined by holographic interferometry, an electromagnetic method. So, the abrupt rate change of the number of the fi~ge evolutions during corrosion tests of the both copper alloys is called electrochemical emission spectroscopy. The corrosion process of both copper alloys was carried out in the seawater at room temperature. The electrochemical-emission spectra of both copper alloys in seawater represent a detailed picture of the rate change of the anodic dissolution of both copper alloys throughout the corrosion processes. Furthermore, the optical interferometry data of the both copper alloys were compared to data obtained from the common methods of electrochemical techniques of corrosion measurements, namely, the linear polarization method, and the Electrochemical Impedance (El) spectroscopy. The comparison indicates that there is a good agreement between the data of the electrochemical-emission spectra of both copper alloys with data of the electrochemical techniques in seawater. In both techniques of the electrochemical-emission spectroscopy and the electrochemical techniques, the corrosion behavior of the pure copper was observed higher than that of the aluminium brass. Consequently, holographic interferometric is found very useful for monitoring the anodic dissolution behaviors of metals, in which the number of the fringe evolutions of both copper alloys can be determined in situ. Keywords:Holographic Interferometry, Electrochemical Impedance (E.I) spectroscopy, Electrochemical-Emission Spectroscopy, linear Polarization, Corrosion, Seawater, and He Ne Iaser Light.
In the present investigation, holographic interferometry was utilized for the first time to determine the rate change of the number of the fiinge evolutions durhlg the corrosion test of a pure copper, 99% Cu, and an aluminium brass, 76% Cu+22% Ni+2%Al, in natural seawater. In other words, the anodic dissolution behaviors (corrosion) of the pure copper and the aluminium brass were determined by holographic interferometry, an electromagnetic method. So, the abrupt rate change of the number of the fi~ge evolutions during corrosion tests of the both copper alloys is called electrochemical emission spectroscopy. The corrosion process of both copper alloys was carried out in the seawater at room temperature. The electrochemical-emission spectra of both copper alloys in seawater represent a detailed picture of the rate change of the anodic dissolution of both copper alloys throughout the corrosion processes. Furthermore, the optical interferometry data of the both copper alloys were compared to data obtained from the common methods of electrochemical techniques of corrosion measurements, namely, the linear polarization method, and the Electrochemical Impedance (El) spectroscopy. The comparison indicates that there is a good agreement between the data of the electrochemical-emission spectra of both copper alloys with data of the electrochemical techniques in seawater. In both techniques of the electrochemical-emission spectroscopy and the electrochemical techniques, the corrosion behavior of the pure copper was observed higher than that of the aluminium brass. Consequently, holographic interferometric is found very useful for monitoring the anodic dissolution behaviors of metals, in which the number of the fringe evolutions of both copper alloys can be determined in situ. Keywords:Holographic Interferometry, Electrochemical Impedance (E.I) spectroscopy, Electrochemical-Emission Spectroscopy, linear Polarization, Corrosion, Seawater, and He Ne Iaser Light.
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