Download or read book Microstructure Characterization Corrosion and Wear Resistance of Duplex Electrodeposited Ni P Ni B TiO2 Sol enhanced Nano composite Coating written by Sina Sheikholeslami and published by . This book was released on 2017 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion and wear are responsible for more than 90% of metals failure in industries. Therefore, it is imperative to overcome the detriment caused by these phenomena to save costs, materials resources, manpower and energy efficiency. Applying coatings is one of the most efficient methods to combat wear and corrosion. Among different coating methods, electrochemical deposition is the most common and appreciated method due to its simple application technique and low cost. For the coating material selection, there are many available options that are compatible with electrodeposition methods. Nickel is one of the major preferences, since it has both good corrosion resistance and mechanical properties compared to other materials. To improve the coating characteristics, several developments have been introduced and investigated. This research considers doping enforcing particles into the coating to create a composite. Compared with conventional coatings, composite coatings have exquisite properties. If the size of doping particles decreases and their dispersion through the coating improves, then the overall properties of the coating are enhanced. Thus, instead of simple composite coatings, micro and nano-composite coatings have been developed. Moreover, the development of the coating itself is not the only relevant issue. In fact, each type of coating is mostly effective against either corrosion attacks or wear. In the electrodeposited nickel coatings category, high concentration phosphorous Ni-P coating is believed to have the ultimate corrosion resistance. Ni-B was believed to be the best coating in terms of tribological behavior. This research group has determined that sol-enhanced nano-composite Ni-B-TiO2 coating is the best coating to protect the surface against wear. However, none of the mentioned coatings can effectively withstand both corrosion and wear at the same time. Facing the problem mentioned above, an idea to create a special coating that can be effective both ways was presented and considered as the provision of the current study. The idea was to simply apply a multilayer coating instead of a single-layer one. The multilayer coating was set to consist of two main layers: The first layer, or the inner layer, is to be deposited on the surface of the substrate to be the corrosion-resistance layer. The second layer, or the outer layer, is to be applied on the top of the first layer to act as a wear resistance shield. For the first layer, high-content phosphorous Ni-P coating and for the second layer, sol-enhanced nano-composite Ni-B-TiO2 coating were selected, respectively. The deposition method for the Ni-P coating was electroless plating and for the sol-enhanced nano-composite Ni-B-TiO2 coating, electroplating was conducted. Optimum sol-enhancement parameters were extracted and used from the published results of a previous study from our research group. To make comparison and investigate the enhancement in properties, along with the duplex Ni-P/NiB-TiO2 coating sample, mono-layer Ni-P and Ni-B-TiO2 coating samples were also prepared for further analysis. It was observed that the microstructure of each layer within the duplex coating is not affected by the duplex coating process and remains identical to the mono-layer coating with the same chemical composition. The XRD-EDS revealed that the chemical composition of the inner and outer layers did not change and remained as single-layer Ni-P and Ni-B-TiO2.The outer layer in the duplex coating was completely the same as the mono-layer Ni-B-TiO2 nano-composite coating with almost the same hardness and grain size. In addition, wear resistance for the duplex coating was reported to be approximately the same as the single layer Ni-B-TiO2 coating and much better than the Ni-P coating. There was also an astonishing result from comparing corrosion behavior between Ni-P and sol-enhanced Ni-B-TiO2 nano-composite coatings. No previous study compared the properties of high-concentration Ni-P coatings and sol-enhanced Ni-B-TiO2 nano-composite coatings. This study has revealed that although Ni-P coatings are generally better than Ni-B coatings in terms of corrosion resistance, the corrosion resistance of this Ni-B-TiO2 coating is slightly better than the high content Ni-P coating, given the current study specifications. However, the ultimate result of this study was to identify the duplex Ni-P/Ni-B-TiO2 coating as having the best corrosion resistance among itself, Ni-P and Ni-B-TiO2 coating samples. It was concluded that while having the same corrosion potential as single layer Ni-B-TiO2 coating, the duplex Ni-P/Ni-B-TiO2 coating has almost 10 times lower corrosion current density and thus, its corrosion kinetic rate is much slower in comparison to other coating samples. Hence, we believe the duplex coating with both good wear resistance and corrosion protection will have great application prospect in a wide range of industries.

Download or read book ELECTROLESS Ni P Ti BASED NANOCOMPOSITE COATINGS written by Zhi Li and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrastructures in various industries, such as oil and gas, chemical, automotive etc., are subjected to aggressive erosive and corrosive environments. A potential candidate for the protection of such infrastructures is electroless Ni-P coating owing to its high hardness and good corrosion resistance. Nevertheless, Ni-P has low toughness, which tends to readily crack and fracture under load. To toughen Ni-P coating, superelastic NiTi particles are an attractive addition. The high price of the NiTi particles, however, restricts their application. Ti particles have much lower price (5-10 times lower) than NiTi particles, which can be employed as an alternative to the NiTi particles. Therefore, to reduce cost, Ti particles were utilized as an addition in the present study. Ni-P-NiTi composite coatings with different Ti concentrations were successfully prepared on low carbon steel substrates by co-plating Ni-P and Ti nanoparticles followed by annealing of Ni-P-Ti coatings. To systematically investigate the effects of the formation of superelastic NiTi phase after annealing on the mechanical, wear, and corrosion properties of the composite coatings, a series of tests were conducted such as scratch, bend, tensile, nanoindentation, single particle erosion, corrosion, and erosion-corrosion tests. The formation of NiTi phase after annealing was substantiated by slow scan XRD, point and line scan EDS. The superelastic effect of NiTi particles was also verified by nanoindentation tests. Compared to Ni-P-Ti coatings annealed at 700°C and 800°C for 5 hours, Ni-P-Ti coatings annealed at 650°C for 2 hours exhibited higher Vickers hardness, scratch toughness, scratch resistance due to the formation of high amount of superelastic NiTi phase. Different toughening mechanisms such as crack deflection, crack bridging, transformation toughening induced by superelastic NiTi particles were observed and identified in the aforementioned tests. In conclusion, the formation of superelastic NiTi phase not only improved the toughness, scratch, indentation, erosion resistance but also considerably enhanced the corrosion and erosion-corrosion resistance of Ni-P coating. As a result, the annealed Ni-P-Ti coatings (i.e., Ni-P-NiTi coatings) may be employed to protect low carbon steel components or in applications where the high cracking resistance, high wear, or impact resistance, and/or high corrosion resistance are required.

Download or read book Nanocomposite Coatings written by Mahmood Aliofkhazraei and published by Nova Science Pub Incorporated. This book was released on 2011-01-01 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews research activities around fabrication of these kinds of two dimensional nanostructured coatings with examples of enhanced mechanical properties, corrosion resistance, and physical characteristics. As one of the useful and simple methods for fabrication of nanocomposite coatings, electrochemical deposition (electroplating) techniques are a strong focus in this book. The relation among nanotechnology and these kinds of nanostructures that come from "size effect" and "distribution effect" is discussed through different chapters of this book. Nanocomposite coatings have numerous advantages.

Download or read book Tribological and Corrosion Performance of Electrodeposited Nickel Composite Coatings written by Nicholus Malatji and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The inclusion of second-phase particles in nickel-based matrix to fabricate composite coatings presents a promising solution to combating corrosion and wear deterioration of materials during service. Composite coatings possess better surface properties such as wear resistance, high microhardness, thermal stability, and corrosion resistance than the traditional nickel coatings. Their excellent properties enable them to be used in advanced industrial applications where they will be constantly exposed to severe and degrading environments. There are various surface modification techniques that are employed to produce these coatings and electrodeposition has received wide range of use in fabrication of nickel matrix composites. This technique is associated with low cost, simplicity of operation, versatility, high production rates, and few size and shape limitations. To produce advanced electrodeposits with better performance during application, the optimization and further developments of the process remain vital. Therefore, this chapter aims to review the electrofabrication and properties of nickel composite/nanocomposite coatings for corrosion and wear applications.

Download or read book Theory and Practice of Metal Electrodeposition written by Yuliy D. Gamburg and published by Springer Science & Business Media. This book was released on 2011-06-11 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors provide new insights into the theoretical and applied aspects of metal electrodeposition. The theory largely focuses on the electrochemistry of metals. Details on the practice discuss the selection and use of metal coatings, the technology of deposition of metals and alloys, including individual peculiarities, properties and structure of coatings, control and investigations. This book aims to acquaint advanced students and researchers with recent advances in electrodeposition while also being an excellent reference for the practical electrodeposition of metals and alloys.

Download or read book Sol TiO2 Enhanced Nanocomposite Silver Coatings by Electroplating written by Bo Hu and published by . This book was released on 2015 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electroplating as a surface treatment technology can significantly improve the properties of working parts and components which has been widely applied in a variety of technical fields. Recently this surface treatment technology has been developed to synthesize nanocomposite coatings. The nanocomposite coatings show a significantly improved mechanical properties due to the second-phase dispersed nanoparticles in the coating matrix. However, it is hard to realize a good suspension of solid nano-sized particles in a plating solution and good dispersion of nano-sized particles in the composite coatings because of the large surface energy of nano-particles. The traditional methods such as magnetic agitation, air injection, and ultrasonic vibration are always difficult to fully prevent agglomeration of nano-sized particles as the surface effect. To achieve a good dispersion of the nanoparticles in composite coatings, sol-gel enhanced electroplating is developed at the University of Auckland and intensively investigated. The aim of this research is to study the electroplating of sol enhanced Ag/TiO2 composite coatings. In the present thesis, TiO2 solid particles and a transparent TiO2 sol was added into a traditional cyanide silver electroplating electrolyte in order to prepare two different types of composite coatings. The research was started with an electroplating of pure silver coatings from traditional cyanide bath. Then investigations were carried out on the solid powder enhanced composite coatings and sol-enhanced composite coatings focused on the effect of the powder and sol concentration. The microstructure, mechanical properties, electrical properties as well as colour difference of the composite coating were investigated in the research. Both of the sol and powder enhanced electroplating successfully added dispersed TiO2 nanoparticles into the Ag coating matrix and improved the mechanical properties compared to the pure silver coating. The sol enhanced nanocomposite coatings shows better dispersion and mechanical properties.

Download or read book Electrodeposition of Ni P SiC Composite Films with High Hardness written by Alma Martínez-Hernández and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter describes the effect of SiC particle concentrations on the metallic continuous phase of the coating and the effect of heat treatment on the crystalline structure, hardness, and wear resistance of electrodeposited Ni-P-SiC coatings. The deposits were obtained via electrodeposition onto an AISI 1018 steel electrode and then heat treated at various temperatures ranging from 300 °C to 600 °C for 60 min in air. The tribological characteristics studied included hardness, friction coefficient, and wear resistance. The results indicated that the dispersion of SiC particles in the metallic matrix improves coating tribological properties such as hardness and wear resistance while diminishing the friction coefficient. The Ni-P-SiC alloy was originally amorphous and was transformed into a mixture of amorphous and crystalline phases when was thermally treated in the range from 400 °C to 500 °C. This phase transformation was associated with the precipitation of a mixture of Ni3P intermetallic compound and pure Ni crystals. In addition, the results showed that the wear resistance of the Ni-P-SiC coating increased with hardness. The maximum hardness (1453.4 HV) was obtained when the Ni-P-SiC coatings were thermally treated at 500 °C.

Download or read book Characterization of Minerals Metals and Materials 2019 written by Bowen Li and published by Springer. This book was released on 2019-02-13 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection gives broad and up-to-date results in the research and development of materials characterization and processing. Topics covered include characterization methods, ferrous materials, non-ferrous materials, minerals, ceramics, polymer and composites, powders, extraction, microstructure, mechanical behavior, processing, corrosion, welding, solidification, magnetic, electronic, environmental, nano-materials, and advanced materials The book explores scientific processes to characterize materials using modern technologies, and focuses on the interrelationships and interdependence among processing, structure, properties, and performance of materials.

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 Electrodeposited Metal Matrix Composites for Enhanced Corrosion Protection and Mechanical Properties written by Casey Ray Thurber and published by . This book was released on 2016 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the oil and gas industry, high corrosion resistance and hardness are needed to extend the lifetime of the coatings due to exposure to high stress and salt environments. Electrodeposition has become a favorable technique in synthesizing coatings because of low cost, convenience, and the ability to work at low temperatures. Electrodeposition of metal matrix composites has become popular for enhanced corrosion resistance and hardness in the oil and gas industry because of the major problems that persist with corrosion. Two major alloys of copper-nickel, 90-10 and 70-30, were evaluated for microbial corrosion protection in marine environments on a stainless steel substrate. Copper and copper alloys are commonly used in marine environments to resist biofouling of materials by inhibiting microbial growth. Literature surveying the electrodeposition of Cu-Ni incorporated with nano- to micro- particles to produce metal matrix composites has been reviewed. Also, a novel flow cell design for the enhanced deposition of metal matrix composites was examined to obtain the optimal oriented structure of the layered silicates in the metal matrix. With the addition of montmorillonite into the Ni and Cu-Ni matrix, an increase in strength, adhesion, wear and fracture toughness of the coating occurs, which leads to an increase corrosion resistance and longevity of the coating. These coatings were evaluated for composition and corrosion using many different types of instrumental and electrochemical techniques. The overall corrosion resistance and mechanical properties were improved with the composite films in comparison to the pure metals, which proves to be advantageous for many economic sectors including the oil and gas industry.

Download or read book Electrodeposition of Cu Ni Composite Coatings written by Casey R. Thurber and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The electrodeposition of Cu-Ni incorporated with nano- to microparticles to produce metal matrix composites has been reviewed in this chapter. The inclusion of particles into the metal matrix produced enhanced properties in the areas of electronics, mechanics, electrochemistry, and corrosion. In electronics, an increase in the magnetic properties and durability for microactuators was observed. Measurements of the mechanical properties showed an increase in hardness, wear resistance, shear adhesion, and tensile strength for the material. The corrosion resistance of the metal matrix coatings was improved over that of pure Cu-Ni. As the accessibility of nanoparticles continues to increase, the interest in reduced cost and low-temperature electrodeposited metal matrix composites continues to rise. However, only a small number of articles have investigated Cu-Ni composite coatings; these composite coatings need further examination due to their advantageous properties.

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 Advanced Coating Materials written by Liang Li and published by John Wiley & Sons. This book was released on 2018-12-06 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a comprehensive, yet practical source of reference, and excellent foundation for comparing the properties and performance of coatings and selecting the most suitable materials based on specific service needs and environmental factors. Coating technology has developed significant techniques for protecting existing infrastructure from corrosion and erosion, maintaining and enhancing the performance of equipment, and provided novel functions such as smart coatings greatly benefiting the medical device, energy, automotive and construction industries. The mechanisms, usage, and manipulation of cutting-edge coating methods are the focus of this book. Not only are the working mechanisms of coating materials explored in great detail, but also craft designs for further optimization of more uniform, safe, stable, and scalable coatings. A group of leading experts in different coating technologies demonstrate their main applications, identify the key bottlenecks, and outline future prospects. Advanced Coating Materials broadly covers the coating techniques, including cold spray, plasma vapor deposition, chemical vapor deposition, sol–gel method, etc., and their significant applications in microreactor technology, super(de)wetting, joint implants, electrocatalyst, etc. Numerous kinds of coating structures are addressed, including nanosize particles, biomimicry structures, metals and complexed materials, along with the environmental and human compatible biopolymers resulting from microbial activities. This state-of-the-art book is divided into three parts: (1) Materials and Methods: Design and Fabrication, (2) Coating Materials: Nanotechnology, and (3) Advanced Coating Technology and Applications.

Download or read book Corrosion Protection and Control Using Nanomaterials written by V S Saji and published by Elsevier. This book was released on 2012-02-21 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion is an expensive and potentially dangerous problem in many industries. The potential application of different nanostructured materials in corrosion protection, prevention and control is a subject of increasing interest. Corrosion protection and control using nanomaterials explores the potential use of nanotechnology in corrosion control.The book is divided into two parts. Part one looks at the fundamentals of corrosion behaviour and the manufacture of nanocrystalline materials. Chapters discuss the impact of nanotechnology in reducing corrosion cost, and investigate the influence of various factors including thermodynamics, kinetics and grain size on the corrosion behaviour of nanocrystalline materials. There are also chapters on electrodeposition and the corrosion behaviour of electrodeposited nanocrystalline materials. Part two provides a series of case studies of applications of nanomaterials in corrosion control. Chapters review oxidation protection using nanocrystalline structures at various temperatures, sol- gel and self-healing nanocoatings and the use of nanoreservoirs and polymer nanocomposites in corrosion control.With its distinguished editors and international team of expert contributors, Corrosion protection and control using nanomaterials is an invaluable reference tool for researchers and engineers working with nanomaterials in a variety of industries including, aerospace, automotive and chemical engineering as well as academics studying the unique protection and control offered by nanomaterials against corrosion. Explores the potential use of nanotechnology and nanomaterials for corrosion prevention, protection and control Discusses the impact of nanotechnology in reducing corrosion cost and investigates various factors on the corrosion behaviour of nanocrystalline materials Provides a series of case studies and applications of nanomaterials for corrosion control

Download or read book Handbook of Nanoelectrochemistry written by Mahmood Aliofkhazraei and published by Springer. This book was released on 2015-11-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited book is devoted to different electrochemical aspects of nano materials. This comprehensive reference text is basically divided in 3 parts: electrochemical synthesis routes for nanosized materials, electrochemical properties of nano materials and electrochemical characterization methods for nanostructures. The Handbook is a reference work to chemists and materials scientists interested in the nano aspects of electrochemistry. The chapters are written by a number of international experts in the field and the content will assist members of both electrochemical and materials communities to keep abreast of developments in the field.

Download or read book Modern Electroplating written by Mordechay Schlesinger and published by John Wiley & Sons. This book was released on 2011-02-14 with total page 755 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive resource for electroplating, now completely up to date With advances in information-age technologies, the field of electroplating has seen dramatic growth in the decade since the previous edition of Modern Electroplating was published. This expanded new edition addresses these developments, providing a comprehensive, one-stop reference to the latest methods and applications of electroplating of metals, alloys, semiconductors, and conductive polymers. With special emphasis on electroplating and electrochemical plating in nanotechnologies, data storage, and medical applications, the Fifth Edition boasts vast amounts of new and revised material, unmatched in breadth and depth by any other book on the subject. It includes: Easily accessible, self-contained contributions by over thirty experts Five completely new chapters and hundreds of additional pages A cutting-edge look at applications in nanoelectronics Coverage of the formation of nanoclusters and quantum dots using scanning tunneling microscopy (STM) An important discussion of the physical properties of metal thin films Chapters devoted to methods, tools, control, and environmental issues And much more A must-have for anyone in electroplating, including technicians, platers, plating researchers, and metal finishers, Modern Electroplating, Fifth Edition is also an excellent reference for electrical engineers and researchers in the automotive, data storage, and medical industries.

Download or read book Electroplating written by Nasser Kanani and published by Elsevier. This book was released on 2004-11-23 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electroplating: Basic Principles, Processes and Practice offers an understanding of the theoretical background to electroplating, which is essential if the practical results are to be as required. This book is different in that it explains HOW the electrodeposition processes work, covering such topics as the elctrodeposition of composites, multilayers, whisker formation and giant magnetoresistive effects. The section on R & D approaches will be especially useful for organisations in the field. This is the first English language version of a well-known German language book from a prestigious author of international repute.‘Electroplating’ is an invaluable resource for manufacturers of coatings, electrochemists, metal finishers and their customers and academics in surface engineering. · Offers an understanding of the theoretical background to electroplating · Explains how the electrodeposition processes work · Prestigious author of international repute