Necessity of a palladium coating to ensure hydrogen oxidation during electrochemical permeation measurements on iron

Transfer function analysis of hydrogen permeation through a metallic membrane in a Devanathan cell

“…In the Devanathan-Stachurski method, the output side of the iron membrane is currently coated with a thin Pd layer to obtain a full oxidation of hydrogen exiting the membrane [19]. However, few authors said that palladium is not necessary [20,21].…”

Development of a novel in-situ technique for hydrogen uptake evaluation from a lubricated tribocontact

“…Partial oxidation of hydrogen atoms could compromise the reliability of the method. The palladium layer on the detection side significantly reduces this unmeasured fraction of hydrogen and ensures high detection efficiency and minimized noise levels [27][28][29]. Another advantage of having a thin layer of palladium is that it prevents anodic dissolution of the metal membrane, otherwise an oxide layer would form on the metal surface which acts as a diffusion barrier for hydrogen [27,28,30].…”

Study of the hydrogen diffusion and segregation into Fe–C–Mo martensitic HSLA steel using electrochemical permeation test

“…The interactions of this element with the metallic structure are often analyzed using permeation tests. The effect of thickness [1][2][3][4], the effect of an oxide layer [5][6][7], the use of a palladium coating [8][9][10][11][12], the influence of temperature to determine the diffusion activation energy [7] and finally the effect of the microstructure of low carbon steels [4,[12][13][14][15][16][17][18][19][20][21][22] had already been discussed in several papers. The electrochemical permeation experiment allows to easily measure the hydrogen flux through a metallic membrane and so is a relevant technique to characterize the hydrogen-metal system.…”