Current Search: Anodes (x)
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Title
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THICKNESS AND PROPERTIES OF ANODIC ALUMINUM-OXIDE FILMS.
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Creator
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PASTORE, GUILLERMO WILLIGMANN., Florida Atlantic University
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Abstract/Description
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The refractive indices and thicknesses of anodically formed oxides on both pure and 3003 alloy aluminum were determined using a transmission spectrophotometric technique. Dispersion curves were obtained for the films formed on both aluminums, and thicknesses were given as a function of voltage for Barrier-films and as a function of time for porous films. Characteristics of formation were reported for both types of films on pure and 3003 alloy aluminum. These formation characteristics are...
Show moreThe refractive indices and thicknesses of anodically formed oxides on both pure and 3003 alloy aluminum were determined using a transmission spectrophotometric technique. Dispersion curves were obtained for the films formed on both aluminums, and thicknesses were given as a function of voltage for Barrier-films and as a function of time for porous films. Characteristics of formation were reported for both types of films on pure and 3003 alloy aluminum. These formation characteristics are interpreted in terms of the solvent action of the anodizing electrolyte on the oxide. the refractive indices of porous films were found to change with time due to the presence of water in the films. A modification of the thickness calculation method is developed for these porous films. Incorporation of water and sulfate anion in the films were detected using infrared spectroscopy. The structures of the films were studied under the microscope, and related to certain aspects of their behavior.
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Date Issued
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1973
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PURL
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http://purl.flvc.org/fcla/dt/13616
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Subject Headings
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Thin films, Aluminum--Anodic oxidation
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Format
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Document (PDF)
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Title
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Modeling of bracelet anodes and anode arrays for pipeline CP systems.
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Creator
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Zhang, Xiaolin., Florida Atlantic University, Hartt, William H., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
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Abstract/Description
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Two models for pipeline bracelet anodes depletion with time were analyzed: one with uniform corrosion and the other with localized corrosion. The potential of the pipeline was determined to become more positive with time due to corrosion of the anode. The pipeline protected by the anode with localized corrosion had more a positive potential than the one protected by the anode with uniform corrosion. A method based upon the equations of Sunde was developed for determining resistance of linear...
Show moreTwo models for pipeline bracelet anodes depletion with time were analyzed: one with uniform corrosion and the other with localized corrosion. The potential of the pipeline was determined to become more positive with time due to corrosion of the anode. The pipeline protected by the anode with localized corrosion had more a positive potential than the one protected by the anode with uniform corrosion. A method based upon the equations of Sunde was developed for determining resistance of linear and rectangular anode arrays. Accuracy of this approach was evaluated using Boundary Element Modeling (BEM). The difference between the two methods was defined as Error. A corrected function of Sunde's equation was developed in order to get a more accurate resistance of a 1 x N anode array. The influence on resistance of a M x N (M < N) anode array of anode size, separation distance and array number was analyzed. Error increased with increasing anode size and decreased with increasing number of anodes and separation distance. The application and limitations of commonly used anode resistance formulas are discussed.
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Date Issued
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2003
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PURL
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http://purl.flvc.org/fcla/dt/13087
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Subject Headings
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Pipelines--Cathodic protection, Corrosion and anti-corrosives, Underwater pipelines, Anodes
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Format
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Document (PDF)
