Rajicic, "Hydrogen damage
of steels: a case study and hydrogen embrittlement model," Engineering Failure Analysis, vol.
On-line monitoring of hydrogen permeation current can provide a causal link between the approximate magnitude of general corrosion, from which the performance of inhibition treatments can be assessed, and an early warning of hydrogen damage
for setting suitable inspection intervals.
In this study, the diffused hydrogen atoms tend to accumulate around the high-stress field, interfaces, and grain boundaries, leading to the main hydrogen damage
that can be obtained by means of stress-induced diffusion, which is given by Dean :
in steels show a strain rate dependence with more damage occurring at slower strain rates.
is evident as internal voids and surface bubbles.
Accelerations in FCGR due to hydrogen damage
may be inhibited by adding small concentrations of certain gases to hydrogen.
In the case of steel, hydrogen damage
may reveal itself as delayed hydrogen cracking, degradation of mechanical properties, especially ductility, and can change microstructures and create bubbles filled with molecular hydrogen, methane or hydrogen sulfide.
"Advanced NDE & Non-Intrusive Inspection Techniques" is said to give a state-of-the-art summary of today's methods including inspecting production welding, corrosion mapping and monitoring, hydrogen damage
and attack, inter granular stress corrosion cracking, in-service inspection of welds, flaw sizing and monitoring, weld root erosion, high temperature inspection and continuous monitoring techniques.
must also be considered and closed shrinkage porosity provides a significant hydrogen trap that inhibits hydrogen removal using thermal bake out procedures.