Download or read book Investigating Corrosion Behaviors of Anodized Metallic Implants by Electrochemical Analysis written by Md. Shafinur Murad and published by . This book was released on 2016 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomaterials are used in implantations inside the human body and have been a reliable method for a long time but not without detrimental effects. Although biomaterial manufacturing companies claim a longer service life for implants, it has been found that after a few years of implantation, a number of patients have complained about severe pain around the implantation areas attributed to the corrosion of implants. A number of research studies are undergoing to understand and reduce this corrosion. Anodization is a method performed in an electrolyte solution to reduce corrosion. Subsequent tests have been performed to recognize the impacts of anodized biomaterials, which includes immersing them into various solutions. The purpose of this research was to carry out a long-term investigation of the corrosive behavior of both anodized and non-anodized biomaterials under controlled conditions. The titanium alloy Ti6Al4V was anodized in 0.4 M phosphoric acid (PHOA) and 0.5 M oxalic acid (OXA), and the magnesium alloy MgAZ31B was anodized in 0.4 M PHOA and 1 N potassium hydroxide (KOH) by applying 20 V DC potential. Prolonged investigations were performed by immersing them in 3% sodium chloride (NaCl), phosphate buffered saline (PBS), and deionized (DI) water solutions and measuring the corrosion rate and pattern by electrochemical analysis. Anodized titanium (Ti) and magnesium (Mg) alloys have been found to be more corrosion resistive than their non-anodized alloys. Maximum corrosion rates (CRs) of 3.0430 mpy and 0.78447 mpy were found for non-anodized and anodized Ti6Al4V, respectively, after immersion in 3% NaCl solution for 1,080 hours. Maximum CRs of 1640.02 mpy and 868.63 mpy were found for nonanodized and anodized MgAZ31B, respectively, after immersion in 3% NaCl solution for 12 hours. It was observed that anodization increases the natural oxide layer on the material surface, which decreases the corrosion rate and prolongs the life of the biomaterial.
Download or read book Corrosion and Corrosion Prevention of Low Density Metals and Alloys written by B. A. Shaw and published by The Electrochemical Society. This book was released on 2001 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrochemical Corrosion Behavior of Metallic Implant Materials written by Enxi Sun and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrochemical and Optical Techniques for the Study and Monitoring of Metallic Corrosion written by M.G.S Ferreira and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 714 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 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.
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:
Download or read book Tribocorrosion Behavior of Metallic Implants written by Mihir V. Patel and published by . This book was released on 2019 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prosthetic implants have helped to restore mobility and increase the function of diseased joints. The modular design of joint replacement is most widely used due to the ease of anatomic customization. Modular interface such as the stem-head interface of total hip replacements is continuously subjected to wear and corrosion. CoCrMo and Ti6Al4V ELI are the most widely used metals in Total Hip Joint Replacement implant devices because of their long life, high mechanical strength, and electrochemical stability. Tribocorrosion behavior study of both metals is essential to predict the actual performance of these metals in implant and to judge which metal is better over others. The scratch test and electrochemistry of corrosion is performed on both metals to see wear behavior at varying Normal load. Three different loads were used on both metals to get a broader view. Open Circuit Potential (OCP) and Potentiostatic Polarization Resistance were measured to analyze corrosion behavior of metal along with mechanical wear by scratching the flat surface with the micromotion of the spherical ball. Potentiodynamic Polarization Resistance (PPR) were measured for corrosion behavior during an ideal condition when there is no mechanical wear. OCP measurement revealed that Ti6Al4V ELI exhibits depassivation for first few cycles of scratch but started repassivation soon with periodic depassivation. While on CoCrMo depassivation was more than repassivation resulting in continuous small drops during fretting. Ti6Al4V ELI showed better corrosion resistance at all loads during fretting. After fretting was ceased, repassivation was faster in CoCrMo than Ti6Al4V ELI. The coefficient of friction (COF) measurement during scratching is beneficial for predicting the material removal and wear debris arrest between contacting surface. PPR measurement yielded a wider range of passive zone for Ti6Al4V ELI when swept through negative to positive voltage. Potentiostatic Polarization at three different voltage resulted in an increase in current density from baseline only in CoCrMo along with scratch at three loads. Ti6Al4V ELI was passive at all three voltage and all three loads. CoCrMo showed a higher change in current density at a higher voltage and load.
Download or read book Anodic Protection written by Olen Riggs and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this book are to give technical information about anodic pro tection, explain how economic analyses are made to determine whether or not it should be used, and describe some of the applications and equipment. Lim itations of the technique will be pointed out. Technological changes that have resulted in higher temperatures, pres sures, and velocities increase corrosion rates and markedly influence materials selection and design decisions. Continuous cycle systems impose increased demands on system reliability. New processes require more sophisticated equipment made of costlier metals which are often in short supply and subject to the vagaries of international commerce. The impact of continuing inflation influences decisions related to capital expenditures and maintenance costs. Some problems caused by these considerations can be solved, or solutions simplified, by the use of anodic protection. Technical and scientific information is presented on applications to industrial equipment, economics, design and installation, operation and maintenance, electrochemical principles, laboratory tests and procedures. A historical summary, patent list, glossary of terms, and a subject index are included. It is important to acknowledge that much of the information has been from the original work of others, including the publications of many friends.
Download or read book Corrosion and Trib corrosion Behaviour of Metallic Orthopaedic Implant Materials written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the introduction of medical implants into human bodies, corrosion and wear have been regarded as key issues for their long-term durability. There has been a recent renewed interest in the use of large diameter metal-on-metal (MoM) hips, primarily because of the reduced volumetric wear compared with the wellestablished polyethylene-on-metal joints. Long term durability of MoM joints relies on control of both their corrosion resistance (relating to ion release) and wear behaviour (relating to creation of nanometre-scale wear debris). Concerns about the potential risk of released metal ions to the biological environment (patient) are of great importance. In this respect tribocorrosion is a serious consideration in joint performance. An integrated electrochemical cell on a reciprocating tribo-meter was employed to evaluate the corrosion and tribocorrosion behaviour in a protein rich solution (Bovine Serum), a cell culture solution (DMEM) and a saline solution (NaCI) with the attempt to isolate the organic species effects. Three commonly used orthopaedic materials were involved in this study. A High Carbon Cobalt-Chromium-Molybdenum alloy, a Low Carbon Cobalt-Chromium-Molybdenum and UNS S31603 Stainless Steel (316L). A range of electrochemical methods were used in the assessment of materials under biotribocorrosion systems and results were supported by surface analysis and bulk solution analysis techniques. The material degradation rate is strongly dependent upon the charge transfer (corrosion), the mechanical damage (tribology) and also their interactions (tribocorrosion) in these simulated biological environments.
Download or read book The Electrochemical and Corrosion Behavior of Aluminum written by George Angelo Di Bari and published by . This book was released on with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Electrochemical and Corrosion Behavior of Aluminum written by George A. DiBari and published by . This book was released on 1970 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts written by and published by . This book was released on 1999 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Laser Surface Modification of Biomaterials written by Rui Vilar and published by Woodhead Publishing. This book was released on 2016-04-15 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser Surface Modification of Biomaterials: Techniques and Applications covers this expanding field, which has many potential applications, including biomaterials. Laser surface modification of biomaterials enables the production of hybrid materials with different functionality in the bulk as well as the thin, sub-micrometer surface layer. This book will provide readers with a comprehensive review of the technology and its applications. Chapters in Part 1 look at the techniques and considerations of laser surface modification, while Part 2 reviews laser surface modification techniques of the most important classes of biomaterials, with a final set of chapters discussing application specific laser surface modification. - Offers a comprehensive review of laser surface modification techniques - Presents recent developments, fundamentals, and progress in laser surface modification - Reviews laser surface modification applications across a range of materials - Emphasizes applications in biomaterials
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.
Download or read book Degradation of Implant Materials written by Noam Eliaz and published by Springer Science & Business Media. This book was released on 2012-08-21 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the current understanding of the mechanical, chemical and biological processes that are responsible for the degradation of a variety of implant materials. All 18 chapters will be written by internationally renowned experts to address both fundamental and practical aspects of research into the field. Different failure mechanisms such as corrosion, fatigue, and wear will be reviewed, together with experimental techniques for monitoring them, either in vitro or in vivo. Procedures for implant retrieval and analysis will be presented. A variety of biomaterials (stainless steels, titanium and its alloys, nitinol, magnesium alloys, polyethylene, biodegradable polymers, silicone gel, hydrogels, calcium phosphates) and medical devices (orthopedic and dental implants, stents, heart valves, breast implants) will be analyzed in detail. The book will serve as a broad reference source for graduate students and researchers studying biomedicine, corrosion, surface science, and electrochemistry.
Download or read book Metals Abstracts Index written by and published by . This book was released on 1996 with total page 1634 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Magnesium Alloy Metallurgy written by Mihriban O Pekguleryuz and published by Elsevier. This book was released on 2013-03-11 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnesium and magnesium alloys offer a wealth of valuable properties, making them of great interest for use across a wide range of fields. This has led to extensive research focused on understanding the properties of magnesium and how these can be controlled during processing. Fundamentals of magnesium alloy metallurgy presents an authoritative overview of all aspects of magnesium alloy metallurgy, including physical metallurgy, deformation, corrosion and applications.Beginning with an introduction to the primary production of magnesium, the book goes on to discuss physical metallurgy of magnesium and thermodynamic properties of magnesium alloys. Further chapters focus on understanding precipitation processes of magnesium alloys, alloying behaviour of magnesium, and alloy design. The formation, corrosion and surface finishing of magnesium and its alloys are reviewed, before Fundamentals of magnesium alloy metallurgy concludes by exploring applications across a range of fields. Aerospace, automotive and other structural applications of magnesium are considered, followed by magnesium-based metal matrix composites and the use of magnesium in medical applications.With its distinguished editors and international team of expert contributors, Fundamentals of magnesium alloy metallurgy is a comprehensive tool for all those involved in the production and application of magnesium and its alloys, including manufacturers, welders, heat-treatment and coating companies, engineers, metallurgists, researchers, designers and scientists working with these important materials. - Overviews all aspects of magnesium alloy metallurgy - Discusses physical metallurgy of magnesium and thermodynamic properties of magnesium alloys - Reviews the formation, corrosion and surface finishing of magnesium and its alloys
