Hydrogen permeation through metals

摘要: Abstract Hydrogen permeation rates have been measured for several metals of interest commonly used vacuum envelopes. These include nickel, OFHC copper, Kovar, stainless steel, cold drawn gas-free iron, Monel and Inconel. A continuous-flow technique was employed, a mass spectrometer tube serving as detector. The coefficient each metal at temperatures in the range from 400 to 900°C data fitted semi-empirical equation. energy derived temperature system. At 1000° K, coefficients, U, units micron liters cm−1 sec−1 atm 1 2 , varied low 0.37 × 10−2 copper high 4.17 iron.