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The Solubility of Gases in Metals

The metals which absorb common gases are summarised in Table 39. Oxides are not mentioned in the table but apart from oxygen, hydrogen interacts most freely with metals, not as a rule to give hydrides but rather alloy systems, or solid [Pg.145]

Hydrogen gives saltlike hydrides Cu, Ag (slight) Hydrogen gives salt-like hydrides Al. Rare earths Ce, La, Nd, Pr Ti, Zr, Hf, Th V, Nb, Ta Cr, Mo, W (Mn) [Pg.146]

Pb (but give covalent hydrides) As, Sb, Bi (but give covalent hydrides) Se, Te give covalent hydrides Rh [Pg.146]

Do not dissolve in any metal so far studied either when liquid or solid [Pg.146]

The greatest diversity of interaction is shown by hydrogen, which reacts with metals to give three different t3rpes of products  [Pg.147]

The diagrams which have just been described are of only limited value because the presence of an alloying element in solution in the iron influences the thermodynamic behaviour of the solute. Thus it is well known that the solubility of gases in metals at constant pressure is changed by addition of alloying elements and since this is only another way of saying that the activity coefficient of the gas atoms in the solution has been changed, we... [Pg.1139]

The solubilities of gases in solid metals are much lower than liquid metals. Figure 10.18 shows the solubility of hydrogen in copper and copper-aluminum alloys. Because of the lower solubility in the solid, gas bubbles are released at the liquid-solid interface as the metal freezes. With long dendrites the gas bubbles are trapped and the result is gas porosity. [Pg.98]

The solubility of gases in alloys The study of gas-alloy systems has been confined principally to hydrogen. One might recognise two possible classes of alloy, one compounded of two hydrogen-dissolving metals, and the... [Pg.158]

Apart from the possibility of gases being trapped inadvertently during casting, considerable difficulties can result from the marked differences in the solubility of gases in liquid and solid metals. An example of this is shown in Fig. 5.18. Examination of this figure indicates that... [Pg.52]

The T dependence of the solubility of CsH in Cs differs significantly from those for solutions of the hydrides in the other alkali metals. Distillation leaves behind involatile impurity salts, but oxygen transport from distilland to receiver has been observed. Oxygen can be carried over with the distillate in the form of COj or CO, the former being produced by decomposition of carbonate and the latter by reduction of oxides with a carbon impurity under dry conditions near the end of distillation. The identification of CO among the noncondensable gases during the distillation of Cs lends support to this. ... [Pg.350]

Solubility of Gases in Platinum.—The solubility of hydrogen in platinum has been studied by Sieverts,1 who has shown that the gas is less soluble in. compact platinum than in the same weight of iron or nickel. At constant pressure the solubility rises with the temperature, whilst at constant temperature the amount of hydrogen absorbed is directly proportional to the square root of the pressure. On cooling, all the hydrogen absorbed at higher temperatures by the metal is evolved. [Pg.265]

Gases can be (very) slightly soluble in molten metals. For example, the solubility, of nitrogen in liquid iron is well correlated by the empirical expression... [Pg.774]

The solubilities of the various gases in [BMIM][PFg] suggests that this IL should be an excellent candidate for a wide variety of industrially important gas separations. There is also the possibility of performing higher-temperature gas separations, thanks to the high thermal stability of the ILs. For supported liquid membranes this would require the use of ceramic or metallic membranes rather than polymeric ones. Both water vapor and CO2 should be removed easily from natural gas since the ratios of Henry s law constants at 25 °C are -9950 and 32, respectively. It should be possible to scrub CO2 from stack gases composed of N2 and O2. Since we know of no measurements of H2S, SO, or NO solubility in [BMIM][PFg], we do not loiow if it would be possible to remove these contaminants as well. Nonetheless, there appears to be ample opportunity for use of ILs for gas separations on the basis of the widely varying gas solubilities measured thus far. [Pg.91]

Calculation of the solubility of simple and complex salts and gases, including estimation of "metal loading" in leach liquors... [Pg.626]

See other pages where The Solubility of Gases in Metals is mentioned: [Pg.273]    [Pg.221]    [Pg.145]    [Pg.207]    [Pg.273]    [Pg.221]    [Pg.145]    [Pg.207]    [Pg.3]    [Pg.597]    [Pg.3]    [Pg.3]    [Pg.2233]    [Pg.98]    [Pg.350]    [Pg.1393]    [Pg.194]    [Pg.172]    [Pg.54]    [Pg.44]    [Pg.67]    [Pg.3]    [Pg.162]    [Pg.14]    [Pg.1071]    [Pg.8]    [Pg.92]    [Pg.133]    [Pg.414]    [Pg.739]    [Pg.12]    [Pg.467]    [Pg.91]    [Pg.684]    [Pg.1082]    [Pg.480]    [Pg.193]    [Pg.132]    [Pg.426]    [Pg.96]    [Pg.92]    [Pg.251]    [Pg.44]    [Pg.288]   


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