The Application Of Ion Exchanged Clay As Corrosion Inhibiting Pigments In Organic Coatings
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Author | : Santi Chrisanti |
Publisher | : |
Total Pages | : 251 |
Release | : 2008 |
Genre | : Corrosion and anti-corrosives |
ISBN | : |
Download The Application of Ion-exchanged Clay as Corrosion Inhibiting Pigments in Organic Coatings Book in PDF, Epub and Kindle
Abstract: High strength aluminum alloys are used in aerospace industry and are normally coated to prevent corrosion. The corrosion protection of the coatings is mainly provided by pigmented-primer layer. Strontium chromate pigments are widely used, but they are toxic and carcinogenic. The objective of the current study is to develop and characterize the ion exchange compounds bentonite and hydrotalcite as corrosion inhibiting pigments. These compounds were synthesized with different cations and anions, and were used either alone or in mixtures as particulate additive in organic coatings. In coating applications as well as bulk solution, the inhibitor release mechanism is based on ion exchange. To evaluate corrosion inhibition, pigments extract solutions were used in potentiodynamic polarization as well as electrochemical impedance spectroscopy (EIS) experiments on bare aluminum alloy 2024-T3. Cathodic polarization showed that zinc- and cerium-containing filtrate solutions modestly inhibited cathodic current density. These solutions also decreased the extent of pitting damage formed on the surface, as compared to uninhibited 0.5 M NaCl solution. Pigments were also added as primer additives, and painted on AA2024-T3. The coated panels were then subjected to salt spray exposure testing. The possibility of sensing inhibitor exhaustion by means of X-ray diffraction interrogation of the pigment in a coating is demonstrated and discussed on cerium bentonite-pigmented coatings. Although cerium bentonite-pigmented coatings did not show behavior indicative of self-healing, the combination of bentonite and hydrotalcite that released Ce3, Zn2, and PO43− showed potent scribe protection even after 3000 h exposure in salt spray. Promising self-healing was also demonstrated by pigments that consisted of decavanadate-hydrotalcite and zinc pyrovanadate, as indicated by a shiny scribed area after 1000h exposure in salt spray. When these pigments are used, blistering is minimized.
Author | : Sudhakar P. V. Mahajanam |
Publisher | : |
Total Pages | : |
Release | : 2005 |
Genre | : Aluminum alloys |
ISBN | : |
Download Application of Hydrotalcites as Corrosion-inhibiting Pigments in Organic Coatings Book in PDF, Epub and Kindle
Abstract: High strength aluminum alloys typically used in the aerospace industry are provided with coatings for corrosion protection. One of the coating layers is the primer, containing corrosion inhibiting pigments. Conventionally chromate pigments have been used but they are carcinogenic; so there is a need to develop environment-friendly alternatives that can match the corrosion inhibition of chromates. In this study, the use of hydrotalcites as corrosion-inhibiting pigments in organic coatings has been explored. Hydrotalcites are anion clays with excellent ion-exchange capabilities, and for this reason they have been used in industry as anion scavengers. Vanadates are excellent inhibitors of Al alloy corrosion. A Zn-Al-decavanadate hydrotalcite (HT-V) was synthesized and its ion exchange properties characterized. From instrumental neutron activation studies, it was determined that inhibitor release was a small fraction of the total inhibitor in the pigment. However, this was sufficient to provide appreciable corrosion inhibition to Al alloys during potentiodynamic polarization. Additionally, inhibitor release occurred even when these pigments were dispersed in epoxy resins and applied to Al alloys. A bare surface in close proximity to the coating was also inhibited from corrosion. Lastly, coatings containing the HT-V pigment performed well in a salt spray environment, protecting scribe corrosion up to [approx.] 1000 h exposure. Blistering problems encountered during this test were overcome by silane additions to the coating, which improved adhesion and controlled blistering.
Author | : Flavio Deflorian |
Publisher | : Frontiers Media SA |
Total Pages | : 137 |
Release | : 2020-12-11 |
Genre | : Technology & Engineering |
ISBN | : 2889662136 |
Download New Pigments and Additives for Corrosion Protection by Organic Coatings Book in PDF, Epub and Kindle
This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Author | : Majid Hosseini |
Publisher | : Springer |
Total Pages | : 715 |
Release | : 2016-05-14 |
Genre | : Technology & Engineering |
ISBN | : 3319268937 |
Download Industrial Applications for Intelligent Polymers and Coatings Book in PDF, Epub and Kindle
This book is a comprehensive collaboration on intelligent polymers and coatings for industrial applications by worldwide researchers and specialists. The authors cover the basis and fundamental aspects of intelligent polymers and coatings, challenges, and potential mechanisms and properties. They include recent and emerging industrial applications in medical, smart textile design, oil and gas, electronic, aerospace, and automobile industries as well as other applications including microsystems, sensors, and actuators, among others. The authors discuss the potential for future research in these areas for improvement and growth of marketable applications of intelligent polymers and coatings.
Author | : D. A. Shifler |
Publisher | : The Electrochemical Society |
Total Pages | : 534 |
Release | : 2005 |
Genre | : Science |
ISBN | : 9781566774574 |
Download Corrosion in Marine and Saltwater Environments II Book in PDF, Epub and Kindle
Author | : Susai Rajendran |
Publisher | : Elsevier |
Total Pages | : 540 |
Release | : 2020-03-10 |
Genre | : Science |
ISBN | : 0128193603 |
Download Corrosion Protection at the Nanoscale Book in PDF, Epub and Kindle
Corrosion Protection at the Nanoscale explores fundamental concepts on how metals can be protected at the nanoscale by using both nanomaterials-based solutions, including nanoalloys, noninhibitors and nanocoatings. It is an important reference resource for both materials scientists and engineers wanting to find ways to create an efficient corrosion prevention strategy. Nanostructure materials have been widely used in many products, such as print electronics, contact, interconnection, implant, nanosensors and display units to lessen the impact of corrosion. Traditional methods for protection of metals include various techniques, such as coatings, inhibitors, electrochemical methods (anodic and cathodic protections), metallurgical design are covered in this book. Nanomaterials-based protective methods can offer many advantages over their traditional counterparts, such as protection for early-stage, higher corrosion resistance, better corrosion control. This book also outlines these advantages and discusses the challenges of implementing nanomaterials as corrosion protection agents on a wide scale. Explains the main methods of detection, monitoring, testing, measurement and simulation of corrosion at the nanoscale Explores how metals can be protected at the nanoscale using nanotechnology and nanomaterials Discusses the major challenges of detecting and preventing corrosion at the nanoscale
Author | : Isao Sekine |
Publisher | : The Electrochemical Society |
Total Pages | : 294 |
Release | : 1998 |
Genre | : Science |
ISBN | : 9781566771917 |
Download Proceedings of the Symposium on Advances in Corrosion Protection by Organic Coatings III Book in PDF, Epub and Kindle
Author | : Inamuddin |
Publisher | : John Wiley & Sons |
Total Pages | : 560 |
Release | : 2021-04-26 |
Genre | : Science |
ISBN | : 1119710235 |
Download Self-Healing Smart Materials Book in PDF, Epub and Kindle
This comprehensive book describes the design, synthesis, mechanisms, characterization, fundamental properties, functions and development of self-healing smart materials and their composites with their allied applications. It covers cementitious concrete composites, bleeding composites, elastomers, tires, membranes, and composites in energy storage, coatings, shape-memory, aerospace and robotic applications. The 21 chapters are written by researchers from a variety of disciplines and backgrounds.
Author | : Ashish Kumar |
Publisher | : CRC Press |
Total Pages | : 379 |
Release | : 2024-08-05 |
Genre | : Technology & Engineering |
ISBN | : 1040090338 |
Download Encapsulated Corrosion Inhibitors for Eco-Benign Smart Coatings Book in PDF, Epub and Kindle
This book covers all the recent advancements and technologies developed for encapsulated corrosion inhibitors-based coatings by using eco-benign and sustainable encapsulated smart coatings based on self-healing functionality. It includes overview of properties and applicability of encapsulated inhibitors, methodologies to detect corrosion, and recent developments made in the field of corrosion science to study the inhibition potential of encapsulated corrosion inhibitors for eco-benign smart coatings in several corrosive systems. Features: Covers encapsulation of the corrosion inhibitor which explores the self-healing mechanism of the smart coatings. Includes encapsulated corrosion inhibitor fabrication, synthesis, modeling, functionalization, classification, characteristics, and so forth. Reviews effectiveness and significant constraints of scale-up engineering. Discusses the fundamental characteristics of industrial-scale application research for encapsulated corrosion inhibitors. Explores entire aspects of encapsulated corrosion inhibitors-based sustainable smart coatings in one place. This book is aimed at researchers and graduate students of corrosion engineering, surface engineering, and chemistry engineering.
Author | : Mohammad Ehtisham Khan |
Publisher | : Elsevier |
Total Pages | : 662 |
Release | : 2023-01-25 |
Genre | : Technology & Engineering |
ISBN | : 0323997058 |
Download Nanocomposites-Advanced Materials for Energy and Environmental Aspects Book in PDF, Epub and Kindle
Nanocomposites-Advanced Materials for Energy and Environmental Aspects provides a brief introduction to metal oxides. The book then discusses novel fabrication methodologies and eco-friendly methods for using a broad range of metal oxide-based nanocomposites in innovative ways. Key aspects include fundamental characteristics of environmentally sustainable fabrication of materials for solar power, power generation and the textiles industries. Commercialization and economic aspects that are currently of major significance are also discussed in detail. The book represents an important information resource for material scientists and engineers to create the next generation of products and devices for energy and environmental applications. Metal and metal oxide-based nanocomposites are at the heart of some of the most exciting developments in the field of energy and environmental research. They have exceptional properties and are utilized in electronic and environmental sensing devices, for energy storage, electrode materials, fuel cells, membranes, and more. Covers fabrication, standard characterization and photocatalytic mechanism for a wide range of applications Includes broad ranging metal and metal oxide-based applications covering environmental, energy, electronics, oil, gas, water treatment and sensing Evaluates dye consumption in the textiles industries and the energy related research that will determine options for sustainable and transformational opportunities