Download or read book PECVD formed Polymer Coatings for the Corrosion Protection of Biocompatible Magnesium Alloy WE43 written by Zhuoya Deng and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Magnesium (Mg) alloys have gained increasing attention for biomedical applications recently. Current permanently-implanted metallic implants for orthopaedic and cardiovascular applications could cause a range of complications, such as endothelial dysfunction, restenosis and local inflammation, which require subsequent surgical interventions. Magnesium and its alloys may be applied as potential biodegradable materials for such applications due to their good mechanical properties, biocompatibility and degradability. Mg alloy degrades via corrosion reaction in the body and should disappear once it finishes surgical fixation. However, the rapid degradation (corrosion) rate of Mg-based implants in the physiological environment poses challenge of their commercialization and widespread use. Formation of anti-corrosive coating is an effective technique to control the corrosion rate of Mg and its alloy. This research focused on investigating the possibility of using biocompatible plasma polymer coatings fabricated by PECVD under various deposition condition, varying from pressure, deposition time and gas ratio to control degradation rate of a biocompatible Mg alloy WE43. Preliminary measurements confirmed that a PECVD coating produced from 1,3-butadiene and ammonia (PPB:N) offered best anti-corrosive properties, and this coating was subsequently chosen for further optimization and characterization for its anti-corrosive properties. It was found that the anti-corrosive properties of the PPB:N depend on both the deposition time and deposition pressure. The optimum coating-formation conditions were determined to be at 100 Pa and 40 minutes of deposition. The coating produced under these conditions offered a protection efficiency of 99.7% after 20 hours of immersion in PBS. Long-term tests evidenced that the PPB:N coating offered a 92% of protection efficiency even after 10 days of immersion in corrosive PBS. Hence, this coating can be considered as a good candidate for control of corrosion rate of a biomedical grade Mg alloy WE43." --

Download or read book Advances in Corrosion Control of Magnesium and its Alloys written by Viswanathan S. Saji and published by CRC Press. This book was released on 2023-08-22 with total page 631 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnesium (Mg) and its alloys have received widespread acceptance in automobile industries and biomedical applications with substantial recent advancements made in their development, however a significant limitation remains their poor aqueous and galvanic corrosion resistance. This book covers both the fundamentals and recent advancements in two major corrosion protection strategies of magnesium and its alloys, namely, metal-matrix composites and protective coatings. Key features: Covers all aspects of metal-matrix composites and protective coatings for magnesium alloys to improve their corrosion resistance, wear resistance, mechanical properties and biocompatibility Provides the most recent research advancements in the corrosion mitigation strategies of magnesium and its alloys Complete with case studies specific to practical applications, this book serves as a ready reference for graduate students, researchers, engineers and industry professionals in the fields of materials, corrosion science, biofouling and protective coatings.

Download or read book Conversion Coatings for Magnesium and its Alloys written by Viswanathan S. Saji and published by Springer Nature. This book was released on 2022-02-01 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers fundamentals and recent advancements on conversion coatings for magnesium and its alloys. The contents are presented in two sections, respectively dealing with chemical and electrochemical conversion coatings. The chemical conversion coating section is further subdivided into inorganic conversion coatings, organic conversion coatings and advanced approaches/coatings. The section on electrochemical conversion coatings spans from fundamentals to state-of-the-art progress on electrochemical anodization and plasma electrolytic oxidation of magnesium and its alloys.

Download or read book Improving Anti corrosive Properties of Electrochemically Formed Polypyrrole Coatings on Magnesium Alloy WE43 by Reduced Graphene Oxide Composites and Forced Passivation written by Logan Carrigan and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Magnesium (Mg) alloys are some of the strongest engineering materials with respect to their low density, but are also highly reactive in most aqueous media, particularly media with chloride ions. Mg alloys have increasingly gained interest as materials used in the automotive industry and for biodegradable medical implants. However, the major obstacle for their effective application in these areas is their poor corrosion properties. In order to tackle this issue, research on the development of new corrosion resistant alloys and anti-corrosive coatings has been done extensively. With respect to the latter, electrochemically-formed polypyrrole (PPy) coatings are of interest. Previously, PPy had been polymerized in our laboratory onto Mg alloy WE43 for biodegradable implant applications and showed a significant decrease in the rate of corrosion. This project investigates two methods to further improve the corrosion protection properties of PPy coatings. The methods are based on (i) the incorporation of reduced graphene oxide (r-GO) into the PPy polymer matrix to create r-GO/PPy composite coatings (r-GO/PPy-WE43) on WE43, and (ii) the forced passivation of WE43 after being coated with PPy (passivated PPy-WE43). Using EIS and H2 evolution measurements the corrosion properties of each modified coating was measured using 3.5 wt.% NaCl over a period of 72 hours. Compared to unmodified PPy coated WE43 (PPy-WE43), the total corrosion resistance observed an increase of 82% and 110% for r-GO/PPy-WE43 and passivated PPy-WE43 respectively. Corrosion protection efficiencies for both modifications were measured to be double that of PPy-WE43 using both EIS and H2 gas measurements. Following these results anti-corrosion mechanisms for both modifications, r-GO/PPy-WE43 and passivated PPy-WE43, were hypothesized." --

Download or read book Corrosion Protection of Magnesium AZ31 Alloy by Polymer Coatings written by Thiago Ferreira da Conceição and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2011 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, the corrosion protection provided by coatings of poly (ether imide)(PEI), poly vinilidene fluoride (PVDF) and polyacrylonitrile (PAN) on magnesium AZ31 alloy sheets in described. The coatings were prepared by spin-coating and dip-coating, using different solutions of the polymers, and the parameters related to the performance of these coatings was investigated by techniques as electrochemical impedance spectroscopy, infrared spectroscopy, x-ray photoelectron spectroscopy and scanning electron microscopy. Special attention was given to interfacial interactions between substrate and polymer as well as interfacial reactions between the coating and the corrosion products. The influence of acid pre-treatments on the coating properties was also investigated. It was observed that a good protection is related to acid-base interactions at the interface and that self-healing process might take place by reactions between polymer the magnesium hydroxide.

Download or read book Corrosion Protection of Magnesium AZ31 Alloy Sheets by Polymer Coatings written by and published by . This book was released on 2011 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of Sacrificial Magnesium Based Coatings by Vapor Deposition for the Corrosion Protection of Magnesium Alloys written by Michael Nunez and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The corrosion properties of pure magnesium (Mg), AZ31, AZ61, AZ91, WE43, and EV31 bulk alloys were analyzed in a solution of 0.1 M sodium chloride (NaCl) adjusted to a pH of 7 with sodium hydroxide (NaOH). Open circuit potential (OCP) measurements, polarization resistance, electrochemical impedance spectroscopy, and potentiodynamic polarization were conducted on all bulk samples. WE43 exhibited the lowest OCP and the lowest corrosion rate of all the bulk alloys in 0.1 M NaCl solutions that were open to air. AZ91 had the lowest corrosion rate of all the bulk alloys in deaerated solutions.Pure Mg, Mg-Sn, and Mg-Zn-Sn thin films were deposited via electron beam physical vapor deposition (EBPVD) and biased target deposition (BTD), with the objective of obtaining an alloy with a lower OCP than all the bulk Mg alloys. Pure Mg films deposited via BTD had the lowest OCP, of about -1.9 V vs. SCE. The pure Mg film deposited via EBPVD also had a low corrosion rate, of about 20.2 mpy in deaerated solutions, compared to bulk pure Mg (53.36). The OCP of the Mg-Sn and Mg-Zn-Sn alloys were shifted towards more positive values with increasing Sn concentration. An increase in the corrosion rate was also observed with increasing Sn concentration, due to microgalvnic effects caused by larger volume fractions of the Mg2Sn phase with higher Sn concentrations. Mg-Sn films deposited via BTD had lower corrosion rates than Mg-Sn films deposited via EBPVD. Pure Mg films deposited via BTD had very porous structures that were detrimental to corrosion. Extreme localized corrosion in the form of filiform corrosion was observed in pure Mg films deposited via BTD.

Download or read book Materials Chemistry written by Bradley D. Fahlman and published by Springer. This book was released on 2018-08-28 with total page 817 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 3rd edition of this successful textbook continues to build on the strengths that were recognized by a 2008 Textbook Excellence Award from the Text and Academic Authors Association (TAA). Materials Chemistry addresses inorganic-, organic-, and nano-based materials from a structure vs. property treatment, providing a suitable breadth and depth coverage of the rapidly evolving materials field — in a concise format. The 3rd edition offers significant updates throughout, with expanded sections on sustainability, energy storage, metal-organic frameworks, solid electrolytes, solvothermal/microwave syntheses, integrated circuits, and nanotoxicity. Most appropriate for Junior/Senior undergraduate students, as well as first-year graduate students in chemistry, physics, or engineering fields, Materials Chemistry may also serve as a valuable reference to industrial researchers. Each chapter concludes with a section that describes important materials applications, and an updated list of thought-provoking questions.

Download or read book Biomanufacturing written by Chander Prakash and published by Springer. This book was released on 2019-03-20 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: ​Current Trends in Biomanufacturing focuses on cutting-edge research regarding the design, fabrication, assembly, and measurement of bio-elements into structures, devices, and systems. The field of biomaterial and biomanufacturing is growing exponentially in order to meet the increasing demands of for artificial joints, organs and bone-fixation devices. Rapid advances in the biological sciences and engineering are leading to newer and viable resources, methods and techniques that may providing better quality of life and more affordable health care services. The book covers the broad aspects of biomanufacturing, including: synthesis of biomaterials; implant coating techniques; spark plasma sintering; microwave processing; and cladding, powder metallurgy and electrospinning. The contributors illustrate the recent trends of biomanufacturing, highlighting the important aspects of biomaterial synthesis, and their use as feedstock of fabrication technologies and their characterization, along with their clinical practices. Current Trends in Biomanufacturing updates researchers and scientists the novelties and techniques of the field, as it summarises numerous aspects of biomanufacturing, including synthesis of biomaterials, fabrication of biomedical structures, their in-vivo/ in-vitro, mechanical analysis and associated ISO standards.

Download or read book Magnesium Technology 2015 written by Michele Manuel and published by Springer. This book was released on 2016-12-26 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Magnesium Technology Symposium, the event on which this collection is based, is one of the largest yearly gatherings of magnesium specialists in the world. Papers represent all aspects of the field, ranging from primary production to applications to recycling. Moreover, papers explore everything from basic research findings to industrialization. Magnesium Technology 2015 covers a broad spectrum of current topics, including alloys and their properties; cast products and processing; wrought products and processing; forming, joining, and machining; corrosion and surface finishing; ecology; and structural applications. In addition, there is coverage of new and emerging applications.

Download or read book Fundamental Biomaterials Metals written by Preetha Balakrishnan and published by Woodhead Publishing. This book was released on 2018-07-19 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamental Biomaterials: Metals provides current information on the development of metals and their conversion from base materials to medical devices. Chapters analyze the properties of metals and discuss a range of biomedical applications, with a focus on orthopedics. While the book will be of great use to researchers and professionals in the development stages of design for more appropriate target materials, it will also help medical researchers understand, and more effectively communicate, the requirements for a specific application. With the recent introduction of a number of interdisciplinary bio-related undergraduate and graduate programs, this book will be an appropriate reference volume for students. It represents the second volume in a three volume set, each of which reviews the most important and commonly used classes of biomaterials, providing comprehensive information on materials properties, behavior, biocompatibility and applications. - Provides current information on metals and their conversion from base materials to medical devices - Includes analyses of types of metals, discussion of a range of biomedical applications, and essential information on corrosion, degradation and wear and lifetime prediction of metal biomaterials - Explores both theoretical and practical aspects of metals in biomaterials

Download or read book Magnesium Technology 2011 written by Wim H. Sillekens and published by John Wiley & Sons. This book was released on 2011-04-12 with total page 669 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Magnesium Technology Symposium, which takes place every year at the TMS Annual Meeting & Exhibition, is one of the largest yearly gatherings of magnesium specialists in the world. Papers are presented in all aspects of the field, ranging from primary production to applications to recycling. Moreover, papers explore everything from basic research findings to industrialization. Magnesium Technology 2011 covers a broad spectrum of current topics, including alloys and their properties; cast products and processing; wrought products and processing; forming, joining, and machining; corrosion and surface finishing; ecology; and structural applications. In addition, you'll find coverage of new and emerging applications in such areas as biomedicine and hydrogen storage.

Download or read book Biological Performance of Materials written by Jonathan Black and published by CRC Press. This book was released on 2005-12-20 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioengineers need a thorough grounding in biocompatibility - the biological performance of materials. Until now, there were no publications suitable for a neophyte in the field; prior publications were either not comprehensive or focused on rather narrow interests. Drawing on the author's 35 years of experience as a teacher, researcher, and consultant in biomaterials science and engineering (BSE), Biological Performance of Materials: Fundamentals of Biocompatibility, Fourth Edition focuses primarily on principles of biological performance at a relatively fundamental level, analyzing interactions between living organisms and nonliving materials used in medical devices - the subject that sets BSE apart as a distinct field of investigation. Following an introductory section, the book is divided into three sections: the material response to biological systems, host response to biomaterials, and test methods for determining biological response in vitro as well as in animal models and clinical settings. Supplemental "Interparts" summarize the physical properties of commonly used metallic, polymeric, and ceramic biomaterials. They also provide a guide to understanding the clinical performance of implanted biomaterials.

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:

Download or read book Nanocoatings and Ultra Thin Films written by Abdel Salam Hamdy Makhlouf and published by Elsevier. This book was released on 2011-09-14 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coatings are used for a wide range of applications, from anti-fogging coatings for glass through to corrosion control in the aerospace and automotive industries. Nanocoatings and ultra-thin films provides an up-to-date review of the fundamentals, processes of deposition, characterisation and applications of nanocoatings.Part one covers technologies used in the creation and analysis of thin films, including chapters on current and advanced coating technologies in industry, nanostructured thin films from amphiphilic molecules, chemical and physical vapour deposition methods and methods for analysing nanocoatings and ultra-thin films. Part two focuses on the applications of nanocoatings and ultra-thin films, with chapters covering topics such as nanocoatings for architectural glass, packaging applications, conventional and smart nanocoatings for corrosion protection in aerospace engineering and ultra-thin membranes for sensor applications.With its distinguished editors and international team of contributors, Nanocoatings and ultra-thin films is an essential reference for professional engineers in the glazing, consctruction, electronics and transport industries, as well as all those with an academic research interest in the field. - Provides an up-to-date review of the fundamentals, processes of deposition, characterisation and applications of nanocoatings - Focuses on the applications of nanocoatings and ultra-thin films, covering topics such as nanocoatings for architectural glass, packaging applications and ultra-thin membranes for sensor applications - Includes chapters on current and advanced coating technologies in industry, nanostructured thin films from amphiphilic molecules, chemical and physical vapour deposition methods and methods for analysing nanocoatings and ultra-thin films

Download or read book Metallic Biomaterials written by Yufeng Zheng and published by John Wiley & Sons. This book was released on 2017-02-27 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: With its comprehensive coverage of recent progress in metallic biomaterials, this reference focuses on emerging materials and new biofunctions for promising applications. The text is systematically structured, with the information organized according to different material systems, and concentrates on various advanced materials, such as anti-bacterial functionalized stainless steel, biodegradable metals with bioactivity, and novel structured metallic biomaterials. Authors from well-known academic institutes and with many years of clinical experience discuss all important aspects, including design strategies, fabrication and modification techniques, and biocompatibility.

Download or read book Handbook of Deposition Technologies for Films and Coatings written by Peter M. Martin and published by William Andrew. This book was released on 2009-12-01 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 3e, edited by Peter M. Martin, PNNL 2005 Inventor of the Year, is an extensive update of the many improvements in deposition technologies, mechanisms, and applications. This long-awaited revision includes updated and new chapters on atomic layer deposition, cathodic arc deposition, sculpted thin films, polymer thin films and emerging technologies. Extensive material was added throughout the book, especially in the areas concerned with plasma-assisted vapor deposition processes and metallurgical coating applications.