An Electrochemical and Surface Analytical Estigation of Iron Oxidation, Passivation and Corrosion Inhibition
Author: Michael Anthony Kamrath
Publisher:
Published: 1991
Total Pages:
ISBN-13:
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Author: Michael Anthony Kamrath
Publisher:
Published: 1991
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: Michael Anthony Kamrath
Publisher:
Published: 1991
Total Pages: 446
ISBN-13:
DOWNLOAD EBOOKA combined electrochemical and surface analytical study of iron oxidation, passive film formation and corrosion inhibitor interaction is presented. Ultrahigh vacuum surface analysis by Auger electron spectroscopy (AES), low energy electron diffraction (LEED), thermal desorption mass spectrometry (TDMS) and ion bombardment (depth profiling) was used to investigate iron oxide films formed on iron by gas phase oxygen exposure as well as electrochemical polarization in borate buffer and corrosion inhibitor solutions. Oxygen exposure to the Fe(100) single crystal surface has unambiguously shown the formation of a c(2 x 2) LEED pattern during the oxide evolution. This step in the oxidation of the (100) surface is often not observed, most likely as a result of prior surface contamination. A calibration technique is also outlined in which the oxide film formed by oxygen exposure can be used to estimate thicknesses of films formed in solution. Passive film investigations by composition depth profiling and TDMS after exposure to borate buffer at various potentials have shown the film is hydrated. Composition depth profiles also indicate that a two-phase oxide is present. An inner barrier layer likely forms by direct substrate oxidation while an outer deposit layer is formed by deposition of solution complexes, especially those containing boron. Surface crystallographic differences are evident in the cyclic voltammetry, the potential-dependent AES surface spectra, and the eventual film thicknesses. Composition depth profiles of films formed on iron after exposure to inhibitor solutions under varying conditions of dissolved ions, pH, and potential have provided clues to reaction mechanisms. Inorganic orthophosphate is not incorporated into the films under deaerated conditions at any potential. In the presence of divalent calcium ion in solution, the film composition is potential dependent. Cathodic polarization produces calcium phosphate films while anodic polarization leads to iron phosphate phases. Again, two-phase barrier and deposit layer films are evident. An organic phosphonic acid, hydroxyethanediphosphonic acid (HEDPA), behaves similar to orthophosphate in deaerated solutions. Aerated solutions produce thicker films as do lower pHs. The mechanism of inhibition in both inorganic and organic inhibitor solutions appears to be through anodic or cathodic polarization.
Author: E. McCafferty
Publisher:
Published: 1986
Total Pages: 670
ISBN-13:
DOWNLOAD EBOOKAuthor: Jeenat Aslam
Publisher: Elsevier
Published: 2023-04-24
Total Pages: 358
ISBN-13: 0443157847
DOWNLOAD EBOOKElectrochemical and Analytical Techniques for Sustainable Corrosion Monitoring presents established research and technology for corrosion monitoring and measurements. Corrosion reduction can be controlled via various ways, including process control, cathodic protection, metal impurity reduction, application of surface treatment methods, and incorporation of appropriate alloys. This is the first book that collectively describes corrosion inhibition measurements using chemical, electrochemical, and analytical methods. The book presents state-of-the art techniques for corrosion monitoring by providing detailed studies and testing methods. It also covers the most advanced, industry-oriented challenges for sustainable corrosion monitoring and measurements. The book is a valuable resource for scholars in academia, materials science and applied engineering and chemistry students, and corrosion engineers. Presents advanced, industry-oriented, and current challenges on electrochemical and analytical techniques for corrosion monitoring and measurements Includes up-to-date reference material including websites of interest and information about the latest research Provides electrochemical and analytical techniques utilized in modern academic and industrial platforms
Author: M.G.S Ferreira
Publisher: Springer Science & Business Media
Published: 2012-12-06
Total Pages: 714
ISBN-13: 940113636X
DOWNLOAD EBOOKIn spite of considerable efforts over the years to understand and combat materials degradation via corrosion processes, many challenges still remain both in the theoretical understanding of the phenomena and in seeking pratical solutions to the perennial problem. Progress has been slow due to the complexity of the processes and the systems involved. Fortunately, in recent years there has been a renaissance in the development of new electrochemical and optical techniques, as well as advances in instrumentation, which have greatly aided our quest to gain insight into the complex mechanisms involved in metallic corrosion and passivation. Numerous scientific meetings, symposia, and workshops have been held allover the world which attest to the frenzy of activities in corrosion science and technology. However, most of these conferences have dealt mainly with recent research results. There appeared to be a need to assess and disseminate our present state of knowledge in the field as regards measurement techniques, theory, and instrumentation. The present NATO Advanced Study Institute was therefore held in Viana do Castelo, Portugal from July 9 to 21, 1989. The Institute consisted of a series of tutorial lectures, poster sessions, and round-table discussions interspersed evenly over the two-week period. It was attended by 75 participants from several countries representing industry, government and university laboratories.
Author: James Douglas Sinclair
Publisher:
Published: 2001
Total Pages: 1208
ISBN-13:
DOWNLOAD EBOOKAuthor: Ken Airey
Publisher:
Published: 1990
Total Pages: 183
ISBN-13:
DOWNLOAD EBOOKAuthor: Ele Eugene Stansbury
Publisher: ASM International
Published: 2000-01-01
Total Pages: 487
ISBN-13: 1615030670
DOWNLOAD EBOOKCovering the essential aspects of the corrosion behavior of metals in aqueous environments, this book is designed with the flexibility needed for use in courses for upper-level undergraduate and graduate students, for concentrated courses in industry, for individual study, and as a reference book.
Author:
Publisher:
Published: 2002
Total Pages: 784
ISBN-13:
DOWNLOAD EBOOKAuthor: Nikon Danilovich Tomashov
Publisher:
Published: 1967
Total Pages: 232
ISBN-13:
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