Research on Hydrogen Embrittlement by the Electrochemical Hydrogen Permeation Technique

摘要

Research on hydrogen embrittlement (HE) using the electrochemical hydrogen permeation technique is reviewed. The diffusion coefficient of hydrogen (D) and the hydrogen permeation rate (J) can be determined more easily by electrochemical hydrogen permeation than by any other method. The threshold hydrogen content for HE is determined, and the HE mechanism is discussed with emphasis on the effect of metallurgical factors on apparent D. The effect of environmental factors on J is also investigated, and the hydrogen-entering mechanism is discussed by the transition of J. Electrochemical hydrogen permeation can be used for in-plant monitoring systems, and can be applied to "in-situ measurements" when combined with other tests of fracture mechanics, ultrasonic wave C-scanning, and so on. It is an important new experimental variation for research on hydrogen embrittlement.