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Author : Jiabin Han
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (515 download)
Download or read book Galvanic Mechanism of Localized Corrosion for Mild Steel in Carbon Dioxide Environments written by Jiabin Han and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Xin Gao
Publisher :
ISBN 13 :
Total Pages : 191 pages
Book Rating : 4.:/5 (12 download)
Download or read book Localized Corrosion Initiation of Steel in CO2 Environments written by Xin Gao and published by . This book was released on 2020 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this dissertation research was to investigate initiation mechanisms for CO2 localized corrosion on mild steel, encompassing the effects of chloride, oxygen, and acetic acid. In CO2 corrosion, iron in steel will be oxidized to ferrous ions under deareated conditions. The ferrous and carbonate ions can combine to form FeCO3 and precipitate once exceeding the solubility limit. When the precipitation of FeCO3 occurs evenly on the steel surface it forms a compact and protective layer. This acts as a diffusion barrier hindering the mass transfer of electrochemical species and covers/blocks the surface making it unavailable for corrosion, which enhances the resistance of mild steel to further uniform CO2 corrosion. However, there are various scenarios where localized corrosion may occur. When the environment becomes more aggressive, the FeCO3 could be partially removed. This leads to localized regions of the bare steel surface that become exposed to the corrosive solution and, subsequently, localized corrosion could be initiated. To study CO2 localized corrosion, two-stage experiments were performed: (1) a uniform protective FeCO3 layer was first formed on a carbon steel with high initial FeCO3 saturation; (2) localized CO2 corrosion scenarios were then developed by adding additional salts (NaCl or NaClO4), oxygen or acetic acid to challenge the protective FeCO3 layer. The experiments were conducted in a two-liter glass cell with a three-electrode system, working electrode (X65 carbon steel), reference electrode (Ag/AgCl saturated electrode), and counter electrode (platinum). Electrochemical measurements (linear polarization resistance) were carried out to observe electrochemical behaviors and calculate the corrosion rates.
Author : Bryon Daniels Winget
Publisher :
ISBN 13 :
Total Pages : 178 pages
Book Rating : 4.:/5 (35 download)
Download or read book Mechanism of Localized Corrosion of Carbon Steel Pipe in Corrosion-inhibited, CO2-saturated Brine written by Bryon Daniels Winget and published by . This book was released on 2008 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Payman Sharifi Abdar
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (14 download)
Download or read book Mechanism and Modeling of Galvanic Corrosion Between Mild Steel and Iron Aulfides in Acidic Solutions written by Payman Sharifi Abdar and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sour hydrocarbon reservoirs, containing H2S gas, are receiving increasing attention due to the growing demand for energy. Although uniform corrosion is not a significant obstacle for oil and gas companies in sour environments, the major challenge in this field is prevention of localized corrosion that can cause failures in production infrastructure. Formation of different types of iron sulfides as corrosion products has been postulated to be a main culprit for localized attack, due to their wide-ranging physicochemical properties, such as their electrical conductivities. The galvanic coupling between iron sulfides layers and mild steel was shown to be the mechanism associated with the localized attacks in sour environments. However, the mechanism of galvanic coupling between mild steel and iron sulfides has not been understood due to the lack of systematic and parametric studies. The research described herein addresses the galvanic coupling between mild steel and iron sulfide polymorphs to investigate the involved mechanisms. For the first step, the uniform corrosion of mild steel in aqueous H2S solutions was critically reviewed, and the mechanism associated with this system including the involved chemical electrochemical reactions was fully described. Furthermore, the mathematical modeling of uniform corrosion rate of mild steel in H2S environments was also comprehensively reviewed. In addition, some new approaches for the modeling of electrochemical reactions as well as corrosion rate were proposed, and the validity of the proposed models were verified through comparing with experimental data. Next step of the current research focused on the galvanic corrosion between mild steel and iron sulfides using both experimental and modeling investigations. In the experimental section, a systematic study was performed in order to determine the contribution of the influential parameters on the galvanic corrosion between mild steel and iron sulfides. On that account, the effect of several important parameters including iron sulfide type, cathode to anode surface area ratio, and solution’s conductivity was examined. Although the conductivity of solution did not show significant impact on the galvanic corrosion rate in the studied experimental conditions, the type of iron sulfide as well as the cathode to anode surface area ratio notably affected the galvanic coupling process. Specifically, the two types of iron sulfides used here, pyrite and pyrrhotite, were shown to produce different galvanic corrosion due to their different electrochemical behaviors. To further elucidate the mechanism of the impact of iron sulfide type, the cathodic behavior of pyrite and pyrrhotite was systematically studied using rotating disk electrode system. The results revealed that pyrrhotite has significantly higher cathodic current than pyrite. This difference originates from different cathodic reactions occurring at the surface of these iron sulfides. Therefore, the associated cathodic reactions were also proposed in this study. The modeling section started with the proposed model for the cathodic current density of mild steel, pyrite, and pyrrhotite. The mathematical model was based on the proposed cathodic reactions as well as the constants found from experimental investigation. The proposed model was then verified by comparing it to the experimental data obtained in this study. In the final part of the current study, a mathematical model based on the polarization measurements was proposed for the prediction of galvanic corrosion rate between mild steel and iron sulfides. The model was compared with the experimental results at various experimental conditions, and very good agreement was found between experimental and modeling results. To summarize, the current research was ale to reveal some mechanistic aspects of the galvanic coupling between mild steel and iron sulfides. The impact of the influential parameters and the electrochemical characteristic of iron sulfides were revealed. Also, the current research, for the first time, developed a mathematical model for the prediction of cathodic current on iron sulfides and the galvanic corrosion rate between mild steel and iron sulfides.
Author : Fumio Hine
Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.3/5 (91 download)
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:
Author : A. M. El-Sherik
Publisher : Woodhead Publishing
ISBN 13 : 0081012195
Total Pages : 928 pages
Book Rating : 4.0/5 (81 download)
Download or read book Trends in Oil and Gas Corrosion Research and Technologies written by A. M. El-Sherik and published by Woodhead Publishing. This book was released on 2017-06-09 with total page 928 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trends in Oil and Gas Corrosion Research and Technologies: Production and Transmission delivers the most up-to-date and highly multidisciplinary reference available to identify emerging developments, fundamental mechanisms and the technologies necessary in one unified source. Starting with a brief explanation on corrosion management that also addresses today’s most challenging issues for oil and gas production and transmission operations, the book dives into the latest advances in microbiology-influenced corrosion and other corrosion threats, such as stress corrosion cracking and hydrogen damage just to name a few. In addition, it covers testing and monitoring techniques, such as molecular microbiology and online monitoring for surface and subsurface facilities, mitigation tools, including coatings, nano-packaged biocides, modeling and prediction, cathodic protection and new steels and non-metallics. Rounding out with an extensive glossary and list of abbreviations, the book equips upstream and midstream corrosion professionals in the oil and gas industry with the most advanced collection of topics and solutions to responsibly help solve today’s oil and gas corrosion challenges. Covers the latest in corrosion mitigation techniques, such as corrosion inhibitors, biocides, non-metallics, coatings, and modeling and prediction Solves knowledge gaps with the most current technology and discoveries on specific corrosion mechanisms, highlighting where future research and industry efforts should be concentrated Achieves practical and balanced understanding with a full spectrum of subjects presented from multiple academic and world-renowned contributors in the industry
Author :
Publisher : ScholarlyEditions
ISBN 13 : 1464923892
Total Pages : 219 pages
Book Rating : 4.4/5 (649 download)
Download or read book Oxides: Advances in Research and Application: 2011 Edition written by and published by ScholarlyEditions. This book was released on 2012-01-09 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxides: Advances in Research and Application: 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Oxides. The editors have built Oxides: Advances in Research and Application: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Oxides in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Oxides: Advances in Research and Application: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Author : Christofer Leygraf
Publisher : John Wiley & Sons
ISBN 13 : 1118762347
Total Pages : 401 pages
Book Rating : 4.1/5 (187 download)
Download or read book Atmospheric Corrosion written by Christofer Leygraf and published by John Wiley & Sons. This book was released on 2016-06-07 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: ATMOSPHERIC CORROSION Presents a comprehensive look at atmospheric corrosion, combining expertise in corrosion science and atmospheric chemistry Atmospheric corrosion has been a subject of engineering study, largely empirical, for nearly a century. Scientists came to the field rather later on and had considerable difficulty bringing their arsenal of tools to bear on the problem. Atmospheric corrosion was traditionally studied by specialists in corrosion having little knowledge of atmospheric chemistry, history, or prospects. Atmospheric Corrosion provides a combined approach bringing together experimental corrosion and atmospheric chemistry. The second edition expands on this approach by including environmental aspects of corrosion, atmospheric corrosion modeling, and international corrosion exposure programs. The combination of specialties provides a more comprehensive coverage of the topic. These scientific insights into the corrosion process and its amelioration are the focus of this book. Key topics include the following: Basic principles of atmospheric corrosion chemistry Corrosion mechanisms in controlled and uncontrolled environments Degradation of materials in architectural, transport, and structural applications; electronic devices; and cultural artifacts Protection of existing materials and choosing new ones that resist corrosion Prediction of how and where atmospheric corrosion may evolve in the future Complete with appendices discussing experimental techniques, computer models, and the degradation of specific metals, Atmospheric Corrosion, Second Edition continues to be an invaluable resource for corrosion scientists, corrosion engineers, conservators, environmental scientists, and anyone interested in the theory and application of this evolving field. The book concerns primarily the atmospheric corrosion of metals and is written at a level suitable for advanced undergraduates or beginning graduate students in any of the physical or engineering sciences.
Author : Angeire S. Huggins Gonzalez
Publisher :
ISBN 13 :
Total Pages : 231 pages
Book Rating : 4.:/5 (118 download)
Download or read book Galvanic Interactions in Sweet and Sour Environments written by Angeire S. Huggins Gonzalez and published by . This book was released on 2019 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of carbon steel exposed to aqueous environments containing dissolved carbon dioxide (CO2) and hydrogen sulfide (H2S) is responsible for many failures of equipment and pipelines in the oil and gas industry. Corrosion product films, e.g., iron carbonate (FeCO3) and iron sulfide (FexSy), play a major role in enhancing localized corrosion after breakdown of these films by either mechanical or chemical means. This has been attributed to galvanic effects driven by the difference in open circuit potential (OCP) between steel covered by FeCO3 or FexSy and bare uncovered areas. Upon localized breakdown of the films, a galvanic current flows between the bare metal areas (anodes) and the areas covered with FeCO3 or FexSy (cathodes). Although many studies have evaluated these galvanic effects, there are still some questions remaining related to the cathodic nature of corrosion product films and their role in enhancing localized corrosion. The present study focused on the evaluation of galvanic interactions of iron (Fe) in CO2 and CO2/H2S environments. The corrosion rate and OCP were measured over time for samples under various conditions, corrosion products on those samples were characterized, and galvanic currents were measured between samples exposed to different conditions. The test conditions were selected to favor the formation of protective films. Fe and steel samples were immersed in 1% NaCl saturated with 100% CO2 or 0.1, 1, 10% H2S/balance CO2. The pH of the bulk solution was adjusted to values between 6 and 8, while the temperature was controlled between 20°C and 80°C. Corrosion product layers were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy. The galvanic interactions were measured using a modified split cell that allowed customization of different environments in each of the half cells, along with simultaneous monitoring of the galvanic current and driving force as indicated by the difference in OCPs. The results indicated that the pH of the bulk solutions plays a major role in the formation of protective FeCO3 scales. Fe exhibited a passive-like behavior when immersed in a solution at 80°C with pH adjusted to 8. The split cell experiments showed that after reaching a passive-like behavior, Fe was cathodic when coupled to samples immersed in a solution with lower pH, and the galvanic current was approximately 2.4 μA/cm2. The galvanic current decreased with increasing temperature and pH gradient between the half cells. The study of artificial couples between Fe electrodes in 1% NaCl solutions saturated with 0.1, 1 or 10% H2S/balance CO2 and with CO2 showed that the galvanic current increased with temperature and %H2S in the gas mixture. At 20°C and 0.1-1%H2S/balance CO2, the FexSy-covered electrodes were cathodic compared to Fe in CO2-saturated solution. At higher temperature and H2S/CO2 ratio, the FexSy covered samples were anodic. The reversal in polarity in the evaluation of temperature, pH and H2S/CO2 ratio suggested that the cathodic or anodic nature of FexSy films may be influenced by the local chemistry in the film/metal interface.
Author : Christian Vargel
Publisher : Elsevier
ISBN 13 : 0080472362
Total Pages : 659 pages
Book Rating : 4.0/5 (84 download)
Download or read book Corrosion of Aluminium written by Christian Vargel and published by Elsevier. This book was released on 2004-10-02 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of Aluminium highlights the practical and general aspects of the corrosion of aluminium alloys with many illustrations and references. In addition to that, the first chapter allows the reader who is not very familiar with aluminium to understand the metallurgical, chemical and physical features of the aluminium alloys. The author Christian Vargel, has adopted a practitioner approach, based on the expertise and experience gained from a 40 year career in aluminium corrosion This approach is most suitable for assessing the corrosion resistance of aluminium- an assessment which is one of the main conditions for the development of many uses of aluminium in transport, construction, power transmission etc. 600 bibliographic references provide a comprehensive guide to over 100 years of related study Providing practical applications to the reader across many industries Accessible to both the beginner and the expert
Author : Haitao Fang
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (787 download)
Download or read book Investigation of Localized Corrosion of Carbon Steel in H2S Environments written by Haitao Fang and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert Baboian
Publisher : ASTM International
ISBN 13 :
Total Pages : 317 pages
Book Rating : 4./5 ( download)
Download or read book Galvanic and Pitting Corrosion-Field and Laboratory Studies written by Robert Baboian and published by ASTM International. This book was released on 1976 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Saba Navabzadeh Esmaeely
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (15 download)
Download or read book Galvanic Localized Corrosion of Mild Steel Under Iron Sulfide Corrosion Product Layers written by Saba Navabzadeh Esmaeely and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : E. McCafferty
Publisher : Springer Science & Business Media
ISBN 13 : 1441904549
Total Pages : 583 pages
Book Rating : 4.4/5 (419 download)
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.
Author : Andreas Momber
Publisher : Academic Press
ISBN 13 : 0323857434
Total Pages : 777 pages
Book Rating : 4.3/5 (238 download)
Download or read book Corrosion and Corrosion Protection of Wind Power Structures in Marine Environments written by Andreas Momber and published by Academic Press. This book was released on 2024-04-06 with total page 777 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion and Corrosion Protection of Wind Power Structures in Marine Environments: Volume 1: Introduction and Corrosive Loads offers the first comprehensive review on corrosion and corrosion protection of offshore wind power structures. The book provides extensive discussion on corrosion phenomena and types in different marine corrosion zones, including the modeling of corrosion processes and interactions between corrosion and structural stability. The book addresses important design issues, namely materials selection relative to performance in marine environments, corrosion allowance, and constructive design. Active and passive corrosion protection measures are emphasized, with special sections on cathodic corrosion protection and the use of protective coatings. Seawater related issues associated with cathodic protection, such as calcareous deposit formation, hydrogen formation and fouling, are discussed. With respect to protective coatings, the book considers for the first time complete loading scenarios, including corrosive loads, mechanical loads, and special loads, and covers a wide range of coating materials. Problems associated with fouling and bacterial-induced corrosion are extensively reviewed. The book closes with a chapter on recent developments in maintenance strategies, inspection techniques, and repair technologies. The book is of special interest to materials scientists, materials developers, corrosion engineers, maintenance engineers, civil engineers, steel work designers, mechanical engineers, marine engineers. Offshore wind power is an emerging renewable technology and a key factor for a cleaner environment. Offshore wind power structures are situated in a demanding and challenging marine environment. The structures are loaded in a complex way, including mechanical loads and corrosive loads. Corrosion is one of the major limiting factors to the reliability and performance of the technology. Maintenance and repair of corrosion protection systems are particularly laborious and costly. Explores the literature between 1950 and 2020 and contains over 2000 references Offers the most complete monograph on the issue Covers all aspects of corrosion protection in detail, including coatings, cathodic protection, corrosion allowance, and constructive design, as well as maintenance and repair Delivers the most complete review on corrosion of metals in marine/offshore environments Focuses on all aspects of offshore wind power structures, including foundations, towers, internal sections, connection flanges, and transformation platforms
Author : Roger Francis
Publisher : Nace International
ISBN 13 :
Total Pages : 168 pages
Book Rating : 4.0/5 ( download)
Download or read book Galvanic Corrosion written by Roger Francis and published by Nace International. This book was released on 2001 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Zaki Ahmad
Publisher : Elsevier
ISBN 13 : 0080480330
Total Pages : 673 pages
Book Rating : 4.0/5 (84 download)
Download or read book Principles of Corrosion Engineering and Corrosion Control written by Zaki Ahmad and published by Elsevier. This book was released on 2006-09-18 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion is a huge issue for materials, mechanical, civil and petrochemical engineers. With comprehensive coverage of the principles of corrosion engineering, this book is a one-stop text and reference for students and practicing corrosion engineers. Highly illustrated, with worked examples and definitions, it covers basic corrosion principles, and more advanced information for postgraduate students and professionals. Basic principles of electrochemistry and chemical thermodynamics are incorporated to make the book accessible for students and engineers who do not have prior knowledge of this area. Each form of corrosion covered in the book has a definition, description, mechanism, examples and preventative methods. Case histories of failure are cited for each form. End of chapter questions are accompanied by an online solutions manual. * Comprehensively covers the principles of corrosion engineering, methods of corrosion protection and corrosion processes and control in selected engineering environments* Structured for corrosion science and engineering classes at senior undergraduate and graduate level, and is an ideal reference that readers will want to use in their professional work* Worked examples, extensive end of chapter exercises and accompanying online solutions and written by an expert from a key pretochemical university
