Kouril M.,Institute of Chemical Technology Prague |
Christensen E.,Technical University of Denmark |
Eriksen S.,Tantaline |
Materials and Corrosion | Year: 2012
The paper is focused on selection of a proper material for construction elements of water electrolysers, which make use of a 85% phosphoric acid as an electrolyte at temperature of 150°C and which might be loaded with anodic polarization up to 2.5V versus a saturated Ag/AgCl electrode (SSCE). Several grades of stainless steels were tested as well as tantalum, niobium, titanium, nickel alloys and silicon carbide. The corrosion rate was evaluated by means of mass loss at free corrosion potential as well as under various levels of polarization. The only corrosion resistant material in 85% phosphoric acid at 150°C and at polarization of 2.5V/SSCE is tantalum. In that case, even a gentle cathodic polarization is harmful in such an acidic environment. Hydrogen reduction leads to tantalum hydride formation, to loss of mechanical properties and to complete disintegration of the metal. Contrary to tantalum, titanium is free of any corrosion resistance in hot phosphoric acid. Its corrosion rate ranges from tens of millimetres to metres per year depending on temperature of the acid. Alloy bonded tantalum coating was recognized as an effective corrosion protection for both titanium and stainless steel. Its serviceability might be limited by slow dissolution of tantalum that is in order of units of mm/year. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
News Article | December 19, 2016
CENTRAL ISLIP, N.Y.--(BUSINESS WIRE)--CVD Equipment Corporation (NASDAQ:CVV), a leading provider of chemical vapor deposition systems, has purchased certain assets (including all of the IP) formerly owned by Tantaline A/S of Nordborg, Denmark through our wholly owned subsidiary, CVD Materials Corporation. Formed in 2007, as a spin off from The Danfoss Group, Tantaline A/S established itself as a leader in the commercialization of tantalum treated parts for corrosion resistance. We have now established in Nordborg a new and wholly owned CVD subsidiary operating under the name Tantaline CVD ApS (“Tantaline®”). This innovative tantalum chemical vapor technology, called Tantaline® treatment, is used to create a tantalum surface alloy on parts including valves, fittings, autoclaves, process chambers, flow reactors, fasteners, mixers, flowmeters, and medical devices, as well as other parts that are prone to corrosion in harsh environments. These parts are used across a broad range of industries including chemical processing, oil & gas, mining, pharmaceutical, and medical. In hot corrosive acidic environments (>150°C) such as sulfuric, nitric, and hydrochloric acids, Tantaline® treated parts outperform most high priced specialty alloys and perform nearly at the level of solid tantalum parts. Tantaline® treatment therefore provides solid tantalum like superior corrosion resistance at a lower part cost. Leonard Rosenbaum, President and CEO stated “With this strategic acquisition CVD gains access to new markets and applications. Additionally, sales and manufacturing operations in Denmark expand our geographic footprint. Plans are also under consideration for additional coating facilities in the US and elsewhere. This is part of our strategic plan to leverage our equipment know-how and proven ability to scale up deposition processes into offering high value added materials, products, and services. This is the first step in our combined organic and acquisition growth initiative for 2017.” CVD Equipment Corporation (NASDAQ: CVV) designs, develops, and manufactures a broad range of chemical vapor deposition, gas control, and other state-of-the-art equipment and process solutions used to develop and manufacture materials and coatings for research and industrial applications. This equipment is used by our customers to research, design, and manufacture these materials or coatings for aerospace engine components, medical implants, semiconductors, solar cells, smart glass, carbon nanotubes, nanowires, LEDs, MEMS, and other applications. Through CVD Materials Corporation and our application laboratory, we provide material coatings, process development support, and process startup assistance with the focus on enabling tomorrow’s technologies™. Tantaline® is a producer of surface alloys for corrosion resistance in harsh environments. Through its innovative tantalum surface alloy technology, Tantaline® delivers the most corrosion resistant coating that is commercially available today. With superior corrosion performance and affordability compared to nickel alloys, titanium, and zirconium metals, Tantaline® helps businesses, ranging from global manufacturers to laboratories, reduce costs, increase productivity, and improve safety. Tantaline®`s coating expertise is applicable in industries such as chemical processing, mining, oil & gas, energy, and medical industries. Additional information can be found at www.tantaline.com The Private Securities Litigation Reform Act of 1995 provides a “safe harbor” for forward-looking statements. Certain information included in this press release (as well as information included in oral statements or other written statements made or to be made by CVD Equipment Corporation) contains statements that are forward-looking. All statements other than statements of historical fact are hereby identified as “forward-looking statements, “as such term is defined in Section 27A of the Securities Exchange Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Such forward looking information involves a number of known and unknown risks and uncertainties that could cause actual results to differ materially from those discussed or anticipated by management. Potential risks and uncertainties include, among other factors, conditions, success of CVD Equipment Corporation’s growth and sales strategies, the possibility of customer changes in delivery schedules, cancellation of orders, potential delays in product shipments, delays in obtaining inventory parts from suppliers and failure to satisfy customer acceptance requirements.
Hansen M.K.,Technical University of Denmark |
Aili D.,Technical University of Denmark |
Christensen E.,Technical University of Denmark |
Pan C.,Technical University of Denmark |
And 5 more authors.
International Journal of Hydrogen Energy | Year: 2012
Steam electrolysis test with a phosphoric acid doped Aquivion™ membrane was successfully conducted and current densities up to 775 mA cm -2 at 1.8 V was reached at 130°C and ambient pressure. A new composite membrane system using a perfluorosulfonic acid membrane (Aquivion™) as matrix and phosphoric acid as proton conducting electrolyte was developed. Traditional perfluorosulfonic acid membranes do not possess sufficient dimensional stability and proton conductivity to be used at elevated temperatures and ambient pressures. The elevated temperature, high potentials and acidic conditions implied that a new and highly corrosion resistant construction material was needed. Tantalum coated stainless steel felt was tested and found suitable as the anode gas diffusion layer. © 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights.
Advanced Materials and Processes | Year: 2010
Tantalum surface alloys provide unmatched corrosion protection at a reasonable cost is discussed. Pure tantalum is one of the most corrosion-resistant metals, but its extremely high cost makes it an impractical option for all but the most corrosive applications. The tantalum vapor then creates an alloy bond on the surface becoming a true surface alloy. The completed part becomes an entirely new product that maintains the original size and shape, but in addition has the chemical properties and corrosion resistance of pure tantalum. It is also extremely rugged and durable, with the ability to be formed into various shapes after processing. Tantaline's tantalum surface alloy can handle an extremely high degree of stress caused by mechanical loads, vibrations, rough physical handling, and/or temperature variations during service. The tantalum surface alloy is very rugged and durable, but it can be sand- blasted off.
Advanced Materials and Processes | Year: 2011
Tantalum surface alloys are used to address the corrosive, mechanical, and economic challenges of the sulfur-iodine thermochemical process. Tantalum surface alloys are created by chemically reacting and vaporizing tantalum at high temperatures. The tantalum metal in the gaseous tantalum atmosphere diffuses into and continues to grow on the surface of the substrate. An alloy zone is created in the substrate material, which is typically stainless steel, because the process occurs at an atomic level and at high temperatures. The tantalum surface is extremely rugged and durable and not susceptible to chipping, spalling, and delamination associated with coatings. Once the alloy zone is formed, the process continues to produce a pure tantalum metal surface having all of the chemical properties of commercially pure tantalum metal as specified by ASTM-B364. The tantalum surface is typically 50 μm thick, which has been shown to be the optimal thickness for most applications.
Chemical Engineering Progress | Year: 2010
The corrosion-sensitive equipment that are found in processing plants and the specialty-metal material options with the innovative techniques employed to resist corrosion are presented. The process equipment made from specialty metals is mechanically rugged and provides excellent corrosion resistance for many processing applications. Surface alloys, linings, and coatings are developed to combine the best properties of multiple materials. Linings such as fluoropolymers and metal claddings can also provide corrosion resistance. The developments in processing tantalum metal have made it possible to create tantalum surface-alloy materials that are suitably rugged and durable for use in the manufacturing of process equipment and that are priced 20-30% lower than specialty alloys such as nickel, titanium and zirconium metal alloys. Zirconium alloys also exhibit excellent resistance to corrosive attack and are suitable for many organic and inorganic acids, salt solutions, strong alkalis, and some molten salts.
Advanced Materials and Processes | Year: 2013
The continually increasing demand for new energy will likely be met through a combination of traditional and emerging energy platforms. While technology needs for traditional oil and gas production differ greatly from the needs of emerging power generation platforms, such as solar, wind, fuel cells, and batteries, a common need among all these sources or energy is advanced materials. Tantalum surface alloys are created by chemically reacting and vaporizing tantalum at high temperatures and growing tantalum into a base substrate like stainless steel. Today's practices involve deeper drilling supplemented by a variety of oil-well simulation techniques. This involves the injection and use of strong acids to improve production and maximize resources. While this approach has shown quantifiable improvements within well extraction, it can be rife with corrosion challenges that compromise efficiency, safety, and effectiveness.
Chemical Engineering | Year: 2011
Heat exchangers represent one of the most fundamental pieces of chemical processing equipment and are vital to heating-and-cooling process streams and reagents. Some of the things for the engineer to consider when selecting materials for heat exchangers include, estimated service life of material, reliability, and material costs. When evaluating a specialty metal solution is the corrosion resistance or corrosion rate of the metal in the target media, because it directly impacts the estimated service life of the heat exchanger. Tube-and-shell heat exchangers are known for their low pressure drop and ability to handle a wide range of materials, from clean liquids and vapor streams to slurries and steams containing high levels of particulate matter. Plate-and-frame heat exchangers are versatile and highly efficient. They can also be produced in a variety of different materials, including specialty alloys. Another variety of the plate-and-frame heat exchanger is the fully welded plate and frame, which takes advantage of a special welding process to bond the plates together.
News Article | August 4, 2011
Tantaline, a Waltham MA-based producer of tantalum surface alloys for hot acid environments, has closed a $3.6m Series B funding. The round was led by Berwind Private Equity (US), Vaekstfonden (DK), and CC Holdings (DK). The company intends to use the funding to further expand its markets and technical capabilities in the United States and Europe. Launched in 2007 and Led by CEO Peter Lock, Tantaline provides engineers with corrosion resistant material helping businesses, ranging from global manufacturers to laboratories, reduce costs, increase productivity, and improve safety. The company’s products are used primarily in the following industries: oil and gas, chemical processing, energy, pharmaceuticals, and mining.