The rates of absorption of hydrogen in stagnant liquid pure silver and silver-copper alloys have been measured using a steady-state gas-liquid metal diffusion cell technique. The diffusion cell was formed by immersing an alumina absorption tube containing hydrogen gas at 1 atm in a bath of stagnant liquid silver.
The appropriate solution of Fick's first law was used to calculate hydrogen diffusion coefficient ($D_H$) for pure liquid silver and hydrogen permeability ($R_H$) was calculated for liquid silver-copper alloys.
The absorption rate have been found to be controlled by diffusion of hydrogen in liquid metal. The diffusion coefficient of hydrogen ($D_H$) in liquid pure silver in the temperature range of 1010℃ to 1130℃ can be described by the following Arrhenious type equation;
$D_H=5.75\times10^{-2} \exp \{(-1511\pm197)/RT \}cm^2/sec$
The permeabilities ($R_H$) of hydrogen in liquid silver-copper alloys in the temperature range of 1000℃ to 1160℃ can be described by the following equations;
$R_H$ pure $Ag = 5.47\times10^{-4} \exp \{(-16872.9\pm 700.0)/RT \} wt\% cm^2/sec$
$R_H$ Cu 1 $wt\% = 2.27\times10^{-4} \exp \{(-13859.6\pm1068.7)/RT\} wt\% cm^2/sec$
$R_H$ Cu 3 $wt\% = 2.16\times10^{-4} \exp \{(-13227.8\pm673.9)/RT\} wt\% cm^2/sec$
$R_H$ Cu 5 $wt\% = 2.15\times10^{-4} \exp \{(-12719.6\pm1351.4)/RT\} wt\% cm^2/sec$
$R_H$ Cu 7 $wt\% = 1.79\times10^{-4} \exp \{(-11909.7\pm1565.6)/RT\} wt\% cm^2/sec$
The rate of absorption of hydrogen in liquid silver-copper alloys have been found to be increased with increased with increasing concentration of copper.
용응 순수온과 은-동 합금내의 수소흡수속도를 steady state gas-liquid metal diffusion cell technique 을 이용하여 측정하였다. 확산 cell 은 stagnant 용응은 내1기압의 수소 개스를 함유한 알루미나 흡수관을 담가서 만든다.
Fick's 제1법칙의 변형된 식을 사용하여 수소확산계수를 계산하였으며 용응 은-동 합금에 있어서 수소의 permeability 를 계산하였다.
수소 흡수속도는 용응 금속내 수소확산에 의하여 지배됨을 알았다. 1010℃ 에서 부터 1130℃ 의 온도 범위에서 순수 용응 은내 수소확산계수 ($D_H$)는 다음과 같은 Arrhenious 식으로 표시된다.
$D_H=5.75\times10^{-2} \exp \{(-1511\pm197)/RT \}cm^2/sec$
1000℃ 에서 부터 1160℃ 의 온도 범위에서 용응 은-동 합금내 수소의 permeability 는 다음과 같은 식으로 표시된다.
$R_H$ pure $Ag = 5.47\times10^{-4} \exp \{(-16872.9\pm 700.0)/RT \} wt\% cm^2/sec$
$R_H$ Cu 1 $wt\% = 2.27\times10^{-4} \exp \{(-13859.6\pm1068.7)/RT\} wt\% cm^2/sec$
$R_H$ Cu 3 $wt\% = 2.16\times10^{-4} \exp \{(-13227.8\pm673.9)/RT\} wt\% cm^2/sec$
$R_H$ Cu 5 $wt\% = 2.15\times10^{-4} \exp \{(-12719.6\pm1351.4)/RT\} wt\% cm^2/sec$
$R_H$ Cu 7 $wt\% = 1.79\times10^{-4} \exp \{(-11909.7\pm1565.6)/RT\} wt\% cm^2/sec$
은-동 합금에 있어서 동의 함량이 증가함에 따라 수소의 흡수속도는 증가하였다.
