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Electrochemical Studies Simulating Corrosion Of Nickel Base Alloys In Thin Layers Of Particulates
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Book Synopsis ELECTROCHEMICAL STUDIES SIMULATING CORROSION OF NICKEL-BASE ALLOYS IN THIN LAYERS OF PARTICULATES. by : R. C. Newman
Download or read book ELECTROCHEMICAL STUDIES SIMULATING CORROSION OF NICKEL-BASE ALLOYS IN THIN LAYERS OF PARTICULATES. written by R. C. Newman and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Highly corrosion-resistant, nickel-chromium-molybdenum Alloy 22 is designated for use for containment of high-level nuclear waste at the proposed Yucca Mountain Repository. At the University of Toronto and several other North American universities, background scientific studies are in progress to improve our understanding of the possible corrosion mechanisms that might affect this class of alloys. We are using less-resistant alloys, beginning with binary Ni-22CrY to study the stability of localized corrosion, such as pitting, in thin layers of moist dust. Relative humidity and temperature are controlled. The arrangement of miniature sensor electrodes (NiCr, Pt, Ag/AgCl) to carry out meaningful electrochemistry in thin layers has been optimized. Various possible pitfalls in such measurements have been identified. The effect of nitrate ion on corrosion behavior in thin layers of particulate is compared with its effect in bulk liquid environments, and the differences quantified and explained.
Download or read book Localized Corrosion written by Fumio Hine and published by . This book was released on 1988 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis MODELING THE CATHODIC REGION IN CREVICE CORROSION UNDER A THIN ELECTROLYTE FILM INCLUDING PARTICULATES. by : U. Landau
Download or read book MODELING THE CATHODIC REGION IN CREVICE CORROSION UNDER A THIN ELECTROLYTE FILM INCLUDING PARTICULATES. written by U. Landau and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The present state of understanding of localized corrosion of passive metals is based primarily upon behavior under fully immersed solutions. There has been limited analysis of localized corrosion in moist layers of dust, particulate and deposits. This work as part of a multi-university Corrosion Cooperative of the DOE-OCRWM Science and Technology Program established to enhance the understanding of corrosion processes and materials performance. The objective of this project is to develop models to simulate localized corrosion. The present analysis focuses specifically on the cathodic region near a corrosion crevice with the objective of characterizing the effects of the critical process parameters on the required current to sustain the crevice corrosion. Previous related analytical and numerical studies have focused on galvanic corrosion where the rates of the anodic and cathodic processes are comparable, analyzing mostly the effects of the electrode kinetics and the thickness of the electrolyte layer. A recent study considers the cathodic region for crevice corrosion. The work here determines two and three dimensional current and potential distributions over the cathode. The analyzed cathodic oxygen reduction region adjacent to the crevice is depicted in Fig. 1. This region is modeled for the presence of extremely thin (G{sub r} = 1-2000 {micro}m) electrolyte film. The electrolyte film may become discontinuous thus limiting the cathode behavior. Spatial variation of pH affecting the oxygen reduction kinetics, and oxygen diffusion limitations in the film are analyzed. Additionally, the presence of particulates is considered. The effects of macroscopic scale parameters, including the extent of the cathodic region (L = 0.1-30 mm), the crevice gap (G{sub a} = 1-25 {micro}m) and the film conductivity (0.012-1.2 mS/cm) on the current and potential distributions were modeled using an electrochemical CAD software. The total current which a specific cathode can provide to sustain the crevice corrosion, was calculated for limiting potential conditions (to prevent anode passivation) set at the crevice opening. Sample results are shown in Fig. 2. A range of electrode kinetics is explored including data typical to oxygen reduction kinetics on stainless-steel and on nickel based alloys. The time-dependent effects of the varying pH due to oxygen reduction were also simulated. The effect of solid particulate in the electrolyte layer was analyzed on both the macroscopic and microscopic level. The particulate effects on the current distribution were analyzed on the macroscopic scale applying Bruggeman's equation for average, ''effective'' properties, and on the microscopic scale, using detailed distributions around single particles and particle arrays. Experiments performed on cells emulating the simulated cathode region to validate the modeling data are reported. Both current distribution and changes in solution pH over the cathode were measured.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 2002 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Corrosion Abstracts written by and published by . This book was released on 1983 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electroless Nickel Plating: Fundamentals to Applications by : Fabienne Delaunois
Download or read book Electroless Nickel Plating: Fundamentals to Applications written by Fabienne Delaunois and published by CRC Press. This book was released on 2019-10-30 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electroless Nickel Plating: Fundamentals to Applications provides a complete and actualized view of electroless nickel plating, thus greatly improving the accessibility of knowledge on the subject. It touches upon all aspects of electroless nickel, from the fundamentals (including thermodynamics of electroless plating, bath chemistry, and substrate preparation) to more applied areas of the field such as bath replenishment, composite coatings, post-treatments, polyalloys, graded and multilayer coatings, ultrasound assistance, applications, and properties. Contributed to by a variety of international authors to ensure different points of view and interests are addressed, this book stands as the first complete and updated state-of-the-art text on electroless nickel in the twenty-first century. It also serves as the first technical book with a strong emphasis on nickel-boron. It also focuses on environmental aspects. Including cutting-edge content presented sufficiently extensive to be directly useful to the practitioner, this book is aimed at materials scientists, metallurgists, and other professionals working with electroless nickel plating.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976-06 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Introduction to Corrosion Science by : E. McCafferty
Download or read book Introduction to Corrosion Science written by E. McCafferty and published by Springer Science & Business Media. This book was released on 2010-01-04 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook is intended for a one-semester course in corrosion science at the graduate or advanced undergraduate level. The approach is that of a physical chemist or materials scientist, and the text is geared toward students of chemistry, materials science, and engineering. This textbook should also be useful to practicing corrosion engineers or materials engineers who wish to enhance their understanding of the fundamental principles of corrosion science. It is assumed that the student or reader does not have a background in electrochemistry. However, the student or reader should have taken at least an undergraduate course in materials science or physical chemistry. More material is presented in the textbook than can be covered in a one-semester course, so the book is intended for both the classroom and as a source book for further use. This book grew out of classroom lectures which the author presented between 1982 and the present while a professorial lecturer at George Washington University, Washington, DC, where he organized and taught a graduate course on “Environmental Effects on Materials.” Additional material has been provided by over 30 years of experience in corrosion research, largely at the Naval Research Laboratory, Washington, DC and also at the Bethlehem Steel Company, Bethlehem, PA and as a Robert A. Welch Postdoctoral Fellow at the University of Texas. The text emphasizes basic principles of corrosion science which underpin extensions to practice.
Download or read book Metals Abstracts written by and published by . This book was released on 1997 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tribocorrosion by : Anna Igual Munoz
Download or read book Tribocorrosion written by Anna Igual Munoz and published by Springer Nature. This book was released on 2020-06-16 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a toolbox for identifying and addressing tribocorrosion situations from an engineering point of view. It is an accessible and introductory guideline to the emerging and interdisciplinary field of tribocorrosion covering the main concepts of tribology and corrosion. It describes specific tribocorrosion concepts, models and experimental techniques as well as their application to practical situations in which mechanical and chemical phenomena act simultaneously.
Book Synopsis Corrosion of Titanium by : J. D. Jackson
Download or read book Corrosion of Titanium written by J. D. Jackson and published by . This book was released on 1966 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electrochemical Power Sources by : M. Barak
Download or read book Electrochemical Power Sources written by M. Barak and published by IET. This book was released on 1980 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses in detail the manufacturing processes, the performances under different condition of operation and the services for which batteries are mainly used.
Book Synopsis Comprehensive Materials Processing by :
Download or read book Comprehensive Materials Processing written by and published by Newnes. This book was released on 2014-04-07 with total page 5485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Materials Processing, Thirteen Volume Set provides students and professionals with a one-stop resource consolidating and enhancing the literature of the materials processing and manufacturing universe. It provides authoritative analysis of all processes, technologies, and techniques for converting industrial materials from a raw state into finished parts or products. Assisting scientists and engineers in the selection, design, and use of materials, whether in the lab or in industry, it matches the adaptive complexity of emergent materials and processing technologies. Extensive traditional article-level academic discussion of core theories and applications is supplemented by applied case studies and advanced multimedia features. Coverage encompasses the general categories of solidification, powder, deposition, and deformation processing, and includes discussion on plant and tool design, analysis and characterization of processing techniques, high-temperatures studies, and the influence of process scale on component characteristics and behavior. Authored and reviewed by world-class academic and industrial specialists in each subject field Practical tools such as integrated case studies, user-defined process schemata, and multimedia modeling and functionality Maximizes research efficiency by collating the most important and established information in one place with integrated applets linking to relevant outside sources
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Plasma Electrolytic Oxidation (PEO) Coatings by : Marta Mohedano
Download or read book Plasma Electrolytic Oxidation (PEO) Coatings written by Marta Mohedano and published by MDPI. This book was released on 2021-06-02 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma electrolytic oxidation (PEO), also known as micro-arc oxidation (MAO), functionalizes surfaces, improving the mechanical, thermal, and corrosion performance of metallic substrates, along with other tailored properties (e.g., biocompatibility, catalysis, antibacterial response, self-lubrication, etc.). The extensive field of applications of this technique ranges from structural components, in particular, in the transport sector, to more advanced fields, such as bioengineering. The present Special Issue covers the latest advances in PEO‐coated light alloys for structural (Al, Mg) and biomedical applications (Ti, Mg), with 10 research papers and 1 review from leading research groups around the world.
