hydrogen damage


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hydrogen damage

[′hī·drə·jən ‚dam·ij]
(metallurgy)
Corrosion, common in boilers, caused by diffusion of hydrogen through steel reacting with carbon to form methane, which builds up local stresses at the interfaces between grains, forming voids that ultimately produce failure.
References in periodicals archive ?
Accelerations in FCGR due to hydrogen damage may be inhibited by adding small concentrations of certain gases to hydrogen.
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.
Hydrogen damage is evident as internal voids and surface bubbles.
Part two then examines modern methods of characterization and analysis of hydrogen damage and part three focuses on the hydrogen degradation of various alloy classes
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.
Part two investigates modern methods of modelling hydrogen damage so as to predict material-cracking properties.