hydrogen permeation
Hydrogen Permeation Through X56 Pipeline Steel in Atmospheric Environment and Its Implication on SCC
... the hydrogen permeation current density increased sharply at the initial of the experiment, and then decreased ...the hydrogen permeation current density increased again and formed the second ...
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A method on hydrogen permeation measurement through steel under constant tensile stress
... of hydrogen by dislocations. Brass and Chene [13] proposed a hydrogen permeation test without Pd coating layer and reported a very low permeation current ...modified hydrogen ...
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Corrosion Characteristics of Hydrogen Permeation Materials in Molten Salt Flinak
... of the hydrogen-permeation materials during exposure to Flinak at 873 K for 304 hr. The Pd-Ag, pure V, and Nb ex- hibited weight gain, while pure Ta lost weight. The weight change for a fusion blanket ...
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Effect of Petrolatum Tape Cover on the Hydrogen Permeation of AISI4135 Steel under Marine Splash Zone Conditions
... of hydrogen permeated through specimens can be obtained by integrating the area below each curve shown in ...still hydrogen permeated through specimen under PTC protection even the amount of hydrogen ...
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Influence of CO2 and H2S Concentration on Hydrogen Permeation Behavior of P110 Steel
... extended hydrogen permeation time, the hydrogen permeation current gradually decreased, and eventually stabilized at ...of hydrogen evolution is increased, which directly leads to the ...
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Hydrogen Permeation of Thin Pd 25Ag Membranes Prepared by Cold Rolling and Microsystem Technology
... mechanical polishing. Figure 1(c) and (d) are SEM image of the 510 and 51 mm-thick Pd-25Ag membrane, respectively, after the hydrogen permeation experiment. Fine grain boundary-like morphologies were ...
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Hydrogen Permeation of Ni Nb Zr Metallic Glasses in a Supercooled Liquid State
... high hydrogen diffusivity and medium hydrogen solubility in order to suppress the severe hydrogen ...which hydrogen can diffuse relatively faster than in the fcc structure, have been adopted as ...
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Effects of the Temperature on the Hydrogen Permeation Behaviours of L360NCS Pipeline Steel in 1MPa H2S Environments
... containing hydrogen sulphide depended on the temperature and the solubility of hydrogen sulphide ...the hydrogen embrittlement are very complicated. Hydrogen permeation through a ...
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An Electrochemical Sensor for Measuring Hydrogen Permeation Behavior in Atmospheric Environment
... maximum hydrogen permeation current values in each wet-dry ...maximum hydrogen permeation current density increased with wet-dry cycles at beginning, and then decreased to steady ...increase ...
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Hydrogen Permeation Estimated by HMT in Carbon Steel Exposed to Gaseous Hydrogen
... of hydrogen evolution increases linearly with the charging ...the hydrogen gas pressure, the amount of hydrogen evolution increases in proportion to the square root of this ...evolved hydrogen ...
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Electron Microscopy Study of Eutectic Structure in Nb Ti X and Nb Zr X (X = Co, Ni) Hydrogen Permeation Alloys
... hydrogen permeability depends on the alloy systems and their compositions. On the basis of the present microstruc- tural observations, the crystal, macro-, and micro-structures of the eutectic Nb-Ti-Ni alloy are ...
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The Effect of Temperature on the Hydrogen Permeation of Pipeline Steel in Wet Hydrogen Sulfide Environments
... steady-state permeation current density, steady-state flux, and the permeation rate increased with increasing ...The hydrogen permeation behavior in under wet H 2 S ...
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Corrosion and hydrogen permeation of low alloy steel in H2S-containing environments : the effect of test buffer solution chemistry
... that hydrogen absorption becomes restricted as the instantaneous CR ...however, hydrogen permeation is sustained at an appreciable value for the entire ...
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Hydrogen Permeation Characteristics of Melt Spun Ni Nb Zr Amorphous Alloy Membranes
... the permeation test at high temperature and high hydrogen ...of hydrogen absorbed amorphous alloy moves to lower temperature side because the amorphous alloy becomes thermally unstable by ...after ...
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Analysis of Electrochemical Hydrogen Permeation through AISI Stainless and Welding Zones for Hydrogen Service
... named hydrogen. Hydrogen economy, that is Fuel Cells System Economy, needs the use of hydrogen embrittlement resistance materials for housings, valves and springs, ...fugacity hydrogen ...
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Hydrogen transport in metals: Integration of permeation, thermal desorption and degassing
... for hydrogen resistance, especially when various metallic systems are ...to hydrogen embrittlement due to the presence of multiple trap species altering the overall mobility of ...electrochemical ...
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Effect of Resins and Membrane Permeation for Improved Selectivity
... The membrane preparation was carried out based on a patented method [16]. The membrane support was prepared by sol gel dip-coating method. Prior to the permeation test, the membrane was weighed to determine the ...
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Transdermal Patches as a tool for permeation of drug through skin
... The dermis is a strong stretch envelops that helps to hold the body together. The dermis is a 3-5 mm thick layer and is composed of a matrix of connective tissue which contains lymph vessels, blood vessels, and nerves. ...
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Mechanism of transdermal permeation promotion of lipophilic drugs by ethosomes
... transdermal permeation promotion of lipophilic drugs by ...percutaneous permeation of Rhodamine B in the optimized ethosomes was superior to that in hydroethanolic solution ...
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In vitro analysis of sublingual vitamin B12 permeation
... Sublingual drug delivery utilises the permeability of the mucosal membrane located on the ventral side of the tongue. The sublingual membrane is a preventative barrier for the permeation of many compounds into ...
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