1. Solubility of hydrogen in aluminum
Hydrogen solubility in aluminum alloys depends on three factors:
temperature ;
the composition of the atmosphere in contact with the alloy;
alloy composition.
1.1 Effect of temperature
This is undoubtedly the factor with the greatest influence on gassing problems. The solubility of hydrogen in pure aluminum, expressed in Ncm3/100 g, varies as shown in figure 1. An abrupt discontinuity appears during solidification. Aluminum is capable of dissolving twenty times more hydrogen in its liquid state than in its solid state at melting temperature. It is this discontinuity that is at the root of gassing...
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Solubility of hydrogen in aluminum
Origin of gassing. Hydrogen sources
References
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