Results 261 to 270 of about 40,575 (290)

Electrochemical Hydrogen Charge Characteristics of Metal Hydride Electrodes

Berichte der Bunsengesellschaft für physikalische Chemie, 1992
AbstractA model for the cathode potential vs. time relationship during the galvanostatic charge process for metal hydride electrodes has been derived on the basis that the adsorbed hydrogen produced at the electrode surface by charge transfer of the Volmer reaction diffuses through the bulk electrodes, i.e., α, (α+β) and β phases during the charge ...
Y. Sakamoto, K. Kuruma, Y. Naritomi
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Researches on Fracture Surfaces Electrochemically Charged with Hydrogen

Advanced Materials Research, 2014
The present paper deals with the morphological alteration of fracture surfaces determined by hydrogen in the case of hydrogen based steels, through electrochemical methods as compared with similar samples of surfaces electrochemically uncharged or with welding deposits created by means of cellulose coated electrodes.
Catalina Sorina Parfene, Gheorghe Solomon, Ionelia Voiculescu, Ion Mihai Vasile, Daniela Ionita   +4 more
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Electrochemical hydrogen permeation tests under galvanostatic hydrogen charging conditions conventionally used for hydrogen embrittlement study

Corrosion Reviews, 2015
Abstract Electrochemical hydrogen permeation tests using pure Fe sheet specimens were performed under various galvanostatic hydrogen charging conditions commonly applied to tensile test specimens used for evaluation of hydrogen embrittlement property to obtain a guideline for efficient hydrogen charging method for a wide range of ...
Eiji Akiyama, Songjie Li
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Hydrogen depth profiles and microhardness of electrochemically hydrogen-charged nanostructured bainitic steels

International Journal of Hydrogen Energy, 2019
Abstract Hydrogen depth profiles and microhardness of the electrochemically hydrogen-charged nanostructured bainitic steels (produced at two different transformation temperatures, i.e. 200 °C (NBS200) and 350 °C (NBS350)) were obtained using elastic recoil detection analysis (ERDA) technique and Vickers microhardness testing, respectively, and ...
Kazum, Oluwole, Ionescu, Mihail, Beladi, Hossein, Kannan, M. Bobby   +3 more
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The electrochemical charge-discharge properties of ZrCrNi hydrogen storage alloys

Journal of Alloys and Compounds, 1995
Abstract Zr(Cr x Ni 1− x ) 2 (0.15 ⩽ x ⩽ 0.65) alloys were prepared by arc melting in an argon atmosphere. Through X-ray diffraction, the main crystal structure of the alloys was found to change from Laves phase cubic C15 to hexagonal C14 as the Cr to Ni ratio increased, and lattice parameters and hydrogen absorption capacities were mainly ...
Lei Yongquan, Yang Xiaoguang, Wu Jing, Wang Qidong   +3 more
openaire   +1 more source

Can Electrochemical Charging Replace Hydrogen Gas Charging During Hydrogen Embrittlement Testing?

CONFERENCE 2024
Abstract This paper presents the output from a study with the aim to correlate hydrogen gas charging and electrochemical charging for a X65 pipeline steel. The hydrogen uptake and diffusivity were evaluated via the permeation technique by employing both hydrogen gas charging and electrochemical charging.
Erik Koren, Roy Johnsen, Dong Wang, Catalina H.M. Hagen, Anette B. Hagen, Bård Nyhus, Antonio Alvaro, Hisao Matsunaga   +7 more
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Colouration of oxidized niobium surfaces by electrochemical hydrogen charging

Journal of the Less Common Metals, 1991
Abstract The colouration of oxidized niobium surfaces by electrochemical hydrogen charging was studied. Oxide films were formed on niobium sheet specimens by two different methods: anodic oxidation in an NaF-H 2 SO 4 solution and oxidation in air at 773 K.
Y. Hayashi, T. Miyakoshi, M. Masuda
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Electrochemical Hydrogen Permeation Tests under Conventional Potentiostatic Hydrogen Charging Conditions Conventionally Used for Hydrogen Embrittlement Study

ECS Transactions, 2017
Electrochemical hydrogen permeation tests were carried out under potentiostatic hydrogen charging conditions in various solutions, and the hydrogen entry behavior was compared with that of galvanostatic method. The relationship between hydrogen permeation current density and potential was similar in potentiostatic and galvanostatic methods and wide ...
Eiji Akiyama, Songjie Li
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A dilatometric study of nickel wire electrode electrochemically charged by hydrogen

Journal of Alloys and Compounds, 1996
Abstract The cathodic charging of nickel with hydrogen was studied with simultaneous measurements of dimensional variations within the solubility region. Relative dimensional changes as low as 3 × 10 −6 could be detected which makes this measuring combination sensitive and powerful in studying the behavior of metal hydrogen systems, particularly in ...
Y. Oren, E. Elish, A. Tamir, Z. Gavra
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Hydride dissociation and hydrogen evolution behavior of electrochemically charged pure titanium

Journal of Alloys and Compounds, 1995
Abstract A commercially pure α-titanium was electrochemically charged with hydrogen in a 5% H2SO4 solution at a current density of 5 kA m−2 for 14.4 ks (4 h), and the dissociation process of the electrochemically formed hydride and the evolution behavior of hydrogen from the samples were investigated by means of high temperature X-ray diffractometry,
Akito Takasaki, Yoshio Furuya, Kozo Ojima, Youji Taneda   +3 more
openaire   +1 more source