Abstract
A new experimental method is described for the study of gas absorption in liquid metals. The technique involves the sudden admission of the gas into a previously evacuated tube containing a column of stagnant liquid metal. Following a short initial period of pressure instability (< 10 sec), absorption rates can be accurately followed by monitoring changes in gas pressure (or volume) using a differential pressure transducer. In the present work, the solution of hydrogen in pure liquid iron was studied and confirmed to be a diffusion controlled process. The mean diffusion coefficient measured for hydrogen absorption in pure iron at 1 atm pressure over the temperature range 1550° to 1720°C was 8.76 x 10−4 sq cm sec−1. This figure is about 35 pct lower than previously reported values by Parlee and coworkers.9−10
Published Version
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