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Institution

DECHEMA

NonprofitFrankfurt am Main, Germany
About: DECHEMA is a nonprofit organization based out in Frankfurt am Main, Germany. It is known for research contribution in the topics: Corrosion & Oxide. The organization has 756 authors who have published 1307 publications receiving 25693 citations.
Topics: Corrosion, Oxide, Coating, Alloy, Catalysis


Papers
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Patent
22 Mar 1980
TL;DR: In this article, the authors present a process for the deposition of traces of gaseous contaminants based on halogen and/or sulfur and /or their compounds, such as mercaptane, H 2 S, HCI, HBr, Hl, organic sulfur and halogen compounds, chlorine, bromine or iodine, from waste gases by chemical adsorption, wherein passing gas stream containing the contaminant by a washing liquid, the heavy metal ions such as silver or copper ions, which are able to form with each to remove pollutants hard Iosllche compounds.
Abstract: Verfahren zur Abscheidung von Spuren gasformiger Schadstoffe auf Basis von Halogen und/oder Schwefel und/oder deren Verbindungen, wie beispielsweise Mercaptane, H 2 S, HCI, HBr, Hl, organische Schwefel- und Halogenverbindungen, Chlor, Brom oder Jod, aus Abgasen durch chemische Adsorption, bei dem man den Schadstoff enthaltenden Gasstrom durch eine Waschflussigkeit leitet, die Schwermetallionen, beispielsweise Silber- oder Kupferionen enthalt, die mit den jeweils zu entfernenden Schadstoffen schwer Iosllche Verbindungen zu bilden vermogen. A process for the deposition of traces of gaseous contaminants based on halogen and / or sulfur and / or their compounds, such as mercaptans, H 2 S, HCI, HBr, Hl, organic sulfur and halogen compounds, chlorine, bromine or iodine, from waste gases by chemical adsorption, wherein passing gas stream containing the contaminant by a washing liquid, the heavy metal ions, such as silver or copper ions, which are able to form with each to remove pollutants hard Iosllche compounds. Mit Hilfe dieses Verfahrens lassen sich selbst kleinste Spuren der genannten gasformigen Schadstoffe rasch aus Abgasen abscheiden, ohne zusatzliche Abgas- bzw. Umweltprobleme zu schaffen. Using this method allows even the smallest traces of said gaseous pollutants from exhaust gases quickly deposited without creating additional waste gas and environmental problems.

11 citations

Journal ArticleDOI
01 Aug 2017-Carbon
TL;DR: In this paper, several commercially available carbon black and graphitized carbon materials were first tested with respect to their thermal and electrochemical stability by thermogravimetric analysis and accelerated degradation test in 7M KOH, respectively.

11 citations

Journal ArticleDOI
16 Jan 2010-JOM
TL;DR: In this paper, a fluorine treatment on γ-TiAl alloys leads to the formation of a pure protective alumina scale and allows their use at service temperatures above 800°C.
Abstract: Titanium aluminides suffer from non-protective mixed-oxide scale formation during high-temperature exposure in oxidizing environments, so that they cannot be used at temperatures above approximately 800° C for longer times without additional treatment. A fluorine treatment on γ-TiAl alloys leads to the formation of a pure protective alumina scale and allows their use at service temperatures above 800°C. This thermally grown aluminum oxide layer can be used for bonding ceramic thermal barrier coatings to the TiAl substrate. Zirconia topcoats deposited by electron-beam physical vapor deposition were very adherent to F-treated TiA samples during cyclic oxidation tests at 900 to 1,000°C. A separate bond coat is not needed in this case.

11 citations

Journal ArticleDOI
Jonathan Z. Bloh1
TL;DR: In this paper, the authors discuss the origin of the efficiency losses and what needs to be done to prevent or counteract it and pave the way for efficient, intensified heterogeneous photocatalytic processes.
Abstract: Advances in LED and photoreactor technology have brought semiconductor photocatalysis to the verge of feasibility of industrial application for the synthesis of value-added chemicals. However, the often observed efficiency losses under intensified illumination conditions still present a great challenge. This perspective discusses the origin of these efficiency losses and what needs to be done to prevent or counteract it and pave the way for efficient, intensified heterogeneous photocatalytic processes. The role of surface catalysis is particularly highlighted as one of the rate-limiting steps.

11 citations

Journal ArticleDOI
TL;DR: In this paper, the authors compared the results of electrochemical corrosion testing methods with the practical performance of the materials and provided an extensive synopsis of present-day knowledge and experience on this subject, with detailed bibliographical notes.
Abstract: Weitgefaster Uberblick des heutigen Kenntnis- und Erfahrungsstandes, mit ausfuhrlichem Schrifttumsverzeichnis. Die Frage, wie weit die Ergebnisse elektrochemischer Korrosionsprufmethoden Schlusse auf das voraussichtliche Verhalten der Werkstoffe in der Praxis ermoglichen, wird unter verschiedenen Aspekten diskutiert. Nach einer Darstellung der Versuchsmethodik zur Ermittlung der durch Elektrodenpotentiale definierbaren Bestandigkeitsbereiche (Aktivitat, Passivitat, Immunitat) werden verschiedene Anwendungsgebiete erortert: kathodischer und anodischer Korrosionsschutz, Ermittlung der Anfalligkeit fur Lochfras und Spannungskorrosion, elektrokinetische Prufung der Wirksamkeit von Oberflachenbehandlungen, Schutzkriterien fur Korrosionsinhibitoren. Schlieslich werden einige Anwendungen bei der industriellen Routine prufung mitgeteilt. Comparing the results of electro-chemical corrosion testing methods with the practical performance of the materials The paper provides an extensive synopsis of present-day knowledge and experience on this subject, with detailed bibliographical notes. The questions as to what extent the results of electrochemical corrosion testing methods permit conclusions concerning the expected performance of the materials in practice is discussed from various aspects. After a description of the test methodology applied to the determination of the stability ranges (activity, passivity, immunity) which can be defined by electrode potentials, the author deals with a number of applications such as: cathodic and anodic corrosion protection, determination of pit corrosion proneness and stress corrosion proneness, electrokinetic tests of the effectiveness of surface treatments, protection criteria for corrosion inhibitors. Finally, some applications in the field of industrial routine testing are discussed.

10 citations


Authors

Showing all 760 results

NameH-indexPapersCitations
Wolf B. Frommer10534530918
Michael W. Anderson10180863603
João Rocha93152149472
Martin Muhler7760625850
Michael Hunger6029511370
Ivars Neretnieks442247159
Michael Schütze403436311
Jens Schrader381294239
Roland Dittmeyer312063762
Lei Li291984003
Dirk Holtmann291073033
Lasse Greiner26741994
Klaus-Michael Mangold23571590
A. Rahmel23591967
Gerhard Kreysa22781305
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20231
20227
202145
202053
201949
201844