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titanium corrosion

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https://www.readbyqxmd.com/read/27897215/novel-ti-ta-hf-zr-alloys-with-promising-mechanical-properties-for-prospective-stent-applications
#1
Jixing Lin, Sertan Ozan, Yuncang Li, Dehai Ping, Xian Tong, Guangyu Li, Cuie Wen
Titanium alloys are receiving increasing research interest for the development of metallic stent materials due to their excellent biocompatibility, corrosion resistance, non-magnetism and radiopacity. In this study, a new series of Ti-Ta-Hf-Zr (TTHZ) alloys including Ti-37Ta-26Hf-13Zr, Ti-40Ta-22Hf-11.7Zr and Ti-45Ta-18.4Hf-10Zr (wt.%) were designed using the d-electron theory combined with electron to atom ratio (e/a) and molybdenum equivalence (Moeq) approaches. The microstructure of the TTHZ alloys were investigated using optical microscopy, XRD, SEM and TEM and the mechanical properties were tested using a Vickers micro-indenter, compression and tensile testing machines...
November 29, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27886000/evaluation-of-corrosion-resistance-and-surface-characteristics-of-orthodontic-wires-immersed-in-different-mouthwashes
#2
Didem Nalbantgil, Feyza Ulkur, Gulfeza Kardas, Mustafa Culha
BACKGROUND: Patients use mouthwashes in addition to mechanical cleaning during orthodontic treatment. The effects of mouthwashes on the archwires have not been examined yet. OBJECTIVE: To compare the corrosion resistance of four different arch wires and corrosion effects of different mouthwashes to formulate a biocompatible and mechanically useful arch wire and mouthwash combination. METHODS: Each group comprised of 4 wire samples of 2 cm 0...
November 25, 2016: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/27881805/corrosion-resistance-and-biological-activity-of-tio2-implant-coatings-produced-in-oxygen-rich-environments
#3
Rui Zhang, Yi Wan, Xing Ai, Zhanqiang Liu, Dong Zhang
The physical and chemical properties of bio-titanium alloy implant surfaces play an important role in their corrosion resistance and biological activity. New turning and turning-rolling processes are presented, employing an oxygen-rich environment in order to obtain titanium dioxide layers that can both protect implants from corrosion and also promote cell adhesion. The surface topographies, surface roughnesses and chemical compositions of the sample surfaces were obtained using scanning electron microscopy, a white light interferometer, and the Auger electron spectroscopy, respectively...
November 23, 2016: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/27869194/a-highly-efficient-stable-durable-and-recyclable-filter-fabricated-by-femtosecond-laser-drilling-of-a-titanium-foil-for-oil-water-separation
#4
Sen Ye, Qiang Cao, Qingsong Wang, Tianyuan Wang, Qing Peng
It has been a long standing challenge to efficiently separate oil and water since prehistoric times, and now it has become even more desirable in oily wastewater purification and oil spill cleanup. Here we introduce a super oil-water separation filter with superhydrophilicity and underwater superoleophobicity, fabricated using femtosecond laser micro-hole drilling of a titanium foil. Such a simply-made filter, without any modification, can achieve a separation efficiency exceeding 99% in eight typical oil-water mixtures...
November 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27860159/evaluation-of-corrosion-resistance-of-implant-use-ti-zr-binary-alloys-with-a-range-of-compositions
#5
Teisuke Akimoto, Takeshi Ueno, Yusuke Tsutsumi, Hisashi Doi, Takao Hanawa, Noriyuki Wakabayashi
Although titanium-zirconium (Ti-Zr) alloy has been adopted for clinical applications, the ideal proportion of Zr in the alloy has not been identified. In this study, we investigated the biocompatibility of Ti-Zr alloy by evaluating its corrosion resistance to better understand whether there is an optimal range or value of Zr proportion in the alloy. We prepared pure Ti, Ti-30Zr, Ti-50Zr, Ti-70Zr, and pure Zr (mol% of Zr) samples and subjected them to anodic polarization and immersion tests in a lactic acid + sodium chloride (NaCl) solution and artificial saliva...
November 18, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27858551/increased-levels-of-dissolved-titanium-are-associated-with-peri-implantitis-a-case-control-study
#6
Luciana M Safioti, Georgios A Kotsakis, Alex E Pozhitkov, Whasun O Chung, Diane M Daubert
BACKGROUND: Peri-implantitis represents a disruption of the biocompatible interface between the titanium (Ti) dioxide layer of the implant surface and the peri-implant tissues. Increasing preclinical data suggest that the peri-implantitis microbiota not only triggers an inflammatory immune response but also causes electrochemical alterations of the Ti surfaces, i.e. corrosion, that aggravate this inflammatory response. Thus, we hypothesized that there is an association between the dissolution of titanium from dental implants, which suggests corrosion, and peri-implantitis in humans...
November 18, 2016: Journal of Periodontology
https://www.readbyqxmd.com/read/27836578/will-new-metal-heads-restore-mechanical-integrity-of-corroded-trunnions
#7
Aditya Derasari, Jonathan E Gold, Sabir Ismaily, Philip C Noble, Stephen J Incavo
BACKGROUND: Metal wear and corrosion from modular junctions in total hip arthroplasty can lead to further unwanted surgery. Trunnion tribocorrosion is recognized as an important contributor to failure. This study was performed to determine if new metal heads restore mechanical integrity of the original modular junction after impaction on corroded trunnions, and assess which variables affect stability of the new interface created at revision total hip arthroplasty. METHODS: Twenty-two trunnions, cobalt-chromium (CoCr) and titanium alloy (TiAIV), (CoCr, n = 12; TiAIV, n = 10) and new metal heads were used, 10 trunnions in pristine condition and 12 with corrosion damage...
October 11, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27829756/corrosion-resistance-of-stainless-steel-nickel-titanium-titanium-molybdenum-alloy-and-ion-implanted-titanium-molybdenum-alloy-archwires-in-acidic-fluoride-containing-artificial-saliva-an-in-vitro-study
#8
Venith Jojee Pulikkottil, S Chidambaram, P U Bejoy, P K Femin, Parson Paul, Mohamed Rishad
OBJECTIVE: (1) To evaluate the corrosion resistance of four different orthodontic archwires and to determine the effect of 0.5% NaF (simulating high fluoride-containing toothpaste of about 2250 ppm) on corrosion resistance of these archwires. (2) To assess whether surface roughness (Ra) is the primary factor influencing the corrosion resistance of these archwires. MATERIALS AND METHODS: Four different archwires (stainless steel [SS], nickel-titanium [NiTi], titanium molybdenum alloy [TMA], and ion-implanted TMA) were considered for this study...
October 2016: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/27818733/skin-corrosion-and-irritation-test-of-nanoparticles-using-reconstructed-three-dimensional-human-skin-model-epiderm-tm
#9
Hyejin Kim, Jonghye Choi, Handule Lee, Juyoung Park, Byung-Il Yoon, Seon Mi Jin, Kwangsik Park
Effects of nanoparticles (NPs) on skin corrosion and irritation using three-dimensional human skin models were investigated based on the test guidelines of Organization for Economic Co-operation and Development (OECD TG431 and TG439). EpiDerm(TM) skin was incubated with NPs including those harboring iron (FeNPs), aluminum oxide (AlNPs), titanium oxide (TNPs), and silver (AgNPs) for a defined time according to the test guidelines. Cell viabilities of EpiDerm(TM) skins were measured by the 3-(4, 5-dimethylthi-azol-2-yl)-2...
October 2016: Toxicological Research
https://www.readbyqxmd.com/read/27818563/corrosion-behavior-of-plasma-electrolytically-oxidized-gamma-titanium-aluminide-alloy-in-simulated-body-fluid
#10
L Lara Rodriguez, P A Sundaram
Plasma electrolytic oxidized (PEO) γTiAl alloy samples were electrochemically characterized by open circuit potential (OCP), cyclic polarization and electrochemical impedance spectroscopy (EIS) to evaluate their corrosion resistance in simulated body fluid (SBF) in order to gauge their potential for biomedical applications. Experimental results through OCP and cyclic polarization studies demonstrated the protective nature and the beneficial effect of the PEO coatings on γTiAl. The PEO surface increased corrosion resistance of these surface modified alloys...
September 15, 2016: Materials Chemistry and Physics
https://www.readbyqxmd.com/read/27782560/a-new-flexible-titanium-foil-cell-for-hydrothermal-experiments-and-fluid-sampling
#11
Shi-Jun Wu, Min-Jian Cai, Can-Jun Yang, Ke-Wei Li
This paper describes the design of a flexible titanium foil cell, as well as its applications in hydrothermal experiments and in non-contaminating storage of seafloor hydrothermal fluids. A flexible cell constructed totally from pure titanium (Grade 1) can be used in corrosive environment because of the excellent chemical stability and temperature tolerance of the material. Theoretical calculation and finite element analysis of the titanium foil cell have been conducted to identify its flexibility and deformation mode...
September 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27782497/biomimetic-coatings-enhance-tribocorrosion-behavior-and-cell-responses-of-commercially-pure-titanium-surfaces
#12
Isabella da Silva Vieira Marques, Maria Fernanda Alfaro, Miki Taketomi Saito, Nilson Cristino da Cruz, Christos Takoudis, Richard Landers, Marcelo Ferraz Mesquita, Francisco Humberto Nociti Junior, Mathew T Mathew, Cortino Sukotjo, Valentim Adelino Ricardo Barão
Biofunctionalized surfaces for implants are currently receiving much attention in the health care sector. Our aims were (1) to create bioactive Ti-coatings doped with Ca, P, Si, and Ag produced by microarc oxidation (MAO) to improve the surface properties of biomedical implants, (2) to investigate the TiO2 layer stability under wear and corrosion, and (3) to evaluate human mesenchymal stem cells (hMSCs) responses cultured on the modified surfaces. Tribocorrosion and cell experiments were performed following the MAO treatment...
August 11, 2016: Biointerphases
https://www.readbyqxmd.com/read/27772706/in-vitro-studying-corrosion-behavior-of-porous-titanium-coating-in-dynamic-electrolyte
#13
Xuedan Chen, Qingshan Fu, Yongzhong Jin, Mingtian Li, Ruisong Yang, Xuejun Cui, Min Gong
Porous titanium (PT) is considered as a promising biomaterials for orthopedic implants. Besides biocompatibility and mechanical properties, corrosion resistance in physiological environment is the other important factor affecting the long stability of an implant. In order to investigate the corrosion behavior of porous titanium implants in a dynamic physiological environment, a dynamic circle system was designed in this study. Then a titanium-based implant with PT coating was fabricated by plasma spraying. The corrosion resistance of PT samples in flowing 0...
January 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27770907/reduced-bacteria-adhesion-on-octenidine-loaded-mesoporous-silica-nanoparticles-coating-on-titanium-substrates
#14
Gaoqiang Xu, Xinkun Shen, Liangliang Dai, Qichun Ran, Pingping Ma, Kaiyong Cai
Bacterial infection is one of the most severe postoperative complications leading to implantation failure. The early bacterial stage (4-6h) was proved to be the "decisive period" for long-term bacteria-related infection. Thus, to endow potential early antibacterial capacity for a titanium (Ti) based implant, an effective antiseptic agent of octenidine dihydrochloride (OCT) was effectively loaded on the mesoporous silica nanoparticles (MSNs)-incorporated titania coating which was fabricated by an electrophoretic-enhanced micro-arc oxidation technique...
January 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27768219/head-neck-taper-corrosion-following-total-hip-arthroplasty-with-stryker-meridian-stem
#15
Sonika Patel, Carl T Talmo, Sumon Nandi
BACKGROUND: Taper corrosion at the modular junctions of total hip arthroplasty (THA) femoral stems are known to cause locally destructive adverse local tissue reaction (ALTR). However, the implants at risk remain to be fully elucidated. CASE REVIEW: We report the case of a 76-year-old woman with hip pain, abductor weakness, and sciatic nerve symptoms 2 years following metal-on-polyethylene THA. Serum cobalt levels were elevated, while chromium levels were normal...
November 10, 2016: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/27734951/a-study-of-electrochemical-machining-of-ti-6al-4v-in-nano3-solution
#16
Hansong Li, Chuanping Gao, Guoqian Wang, Ningsong Qu, Di Zhu
The titanium alloy Ti-6Al-4V is used in many industries including aviation, automobile manufacturing, and medical equipment, because of its low density, extraordinary corrosion resistance and high specific strength. Electrochemical machining (ECM) is a non-traditional machining method that allows applications to all kinds of metallic materials in regardless of their mechanical properties. It is widely applied to the machining of Ti-6Al-4V components, which usually takes place in a multicomponent electrolyte solution...
October 13, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27733875/corrosion-analysis-of-an-experimental-noble-alloy-on-commercially-pure-titanium-dental-implants
#17
Manuel Alberto Bortagaray, Claudio Arturo Antonio Ibañez, Maria Constanza Ibañez, Juan Carlos Ibañez
OBJECTIVE: To determine whether the Noble Bond(®) Argen(®) alloy was electrochemically suitable for the manufacturing of prosthetic superstructures over commercially pure titanium (c.p. Ti) implants. Also, the electrolytic corrosion effects over three types of materials used on prosthetic suprastructures that were coupled with titanium implants were analysed: Noble Bond(®) (Argen(®) ), Argelite 76sf +(®) (Argen(®) ), and commercially pure titanium. MATERIALS AND METHODS: 15 samples were studied, consisting in 1 abutment and one c...
2016: Open Dentistry Journal
https://www.readbyqxmd.com/read/27714021/toxicological-aspects-of-soluble-titanium-a-review-of-in-vitro-and-in-vivo-studies
#18
M Golasik, M Herman, W Piekoszewski
Owing to the widespread use of titanium dioxide (TiO2) in various food, household and cosmetic products and in industry, the number of publications concerned with the potential toxic effects and health risks related to this substance in both bulk and nano form is steadily increasing. On the other hand, there is also a third form of titanium, ionic, which is produced by the biodegradation of Ti alloy implants. Thus, the growing population of implant recipients should raise concerns about the impact of soluble Ti on human health...
September 29, 2016: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/27709458/retraction-note-to-effect-of-coupling-asynchronous-acoustoelectric-effects-on-the-corrosion-behavior-microhardness-and-biocompatibility-of-biomedical-titanium-alloy-strips
#19
Xiaoxin Ye, Guoyi Tang
No abstract text is available yet for this article.
November 2016: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/27688425/titanium-ions-release-from-an-innovative-titanium-magnesium-composite-an-in-vitro-study
#20
Zlatko Stanec, Jasna Halambek, Krešimir Maldini, Martin Balog, Peter Križik, Zdravko Schauperl, Amir Ćatić
BACKGROUND: The innovative titanium-magnesium composite (Ti-Mg) was produced by powder metallurgy (P/M) method and is characterized in terms of corrosion behavior. MATERIAL AND METHODS: Two groups of experimental material, 1 mass% (Ti-1Mg) and 2 mass% (Ti-2Mg) of magnesium in titanium matrix, were tested and compared to commercially pure titanium (CP Ti). Immersion test and chemical analysis of four solutions: artificial saliva; artificial saliva pH 4; artificial saliva with fluoride and Hank balanced salt solution were performed after 42 days of immersion, using inductively coupled plasma mass spectrometry (ICP-MS) to detect the amount of released titanium ions (Ti)...
March 2016: Acta Stomatologica Croatica
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