The solubility of hydrogen in liquid iron, liquid nickel and liquid iron alloys has been studied by SIEVERTS' method at the temperature range of 1450-1670°C and under the atmospheric pressure of hydrogen.
The carbon, silicon and phosphorus decrease the solubility of hydrogen in alloys, while nickel increases it.
The iron-silicon alloy has the minimum solubility of hydrogen at the concentration of 31-34%Si.
The results obtained are summarized as follows:
1. Solubility of hydrogen in liquid iron
log KFe-H(=[%H]/√PH2)=-1900/T-1.577
2. Solubility of hydrogen in liquid nickel
log KNi-H(=[%H]/√PH2)=-939/T-1.869
3. Interaction parameter in iron alloys
∂ log f(C)H/∂[%C]=417/T-0.204……<2%C
∂ log f(Si)H/∂[%Si]=0.031……<2%Si
∂ log f(P)H/∂[%P]=0.015……<6%P
∂ log f(Ni)H/∂[%Ni]=10.4/T+0.0040……<50%Ni
