3 ms·
Possibly the journalist mixed two totally separate stories, hydrogen embrittlement and corrosion fatigue. That would fit the symptoms and the journalists visua
by VLM 11y ago
Possibly the journalist mixed two totally separate stories, hydrogen embrittlement and corrosion fatigue. That would fit the symptoms and the journalists visual observations of testing.
I suppose H2 damaged steel, could lead to cracks, that when put underwater under tension would cause faster than expected corrosion fatigue like a couple years instead of a couple centuries, they're not totally unrelated.
(edited to rephrase corrosion doesn't cause brittleness but brittleness can speed corrosion in the above scheme)
- benzofuran 11y agoNot knowing the particulars of the bridge CP system in place, hydrogen embrittlement is possible but it sounds more like stress corrosion cracking is the major culprit.
- refurb 11y agoWhere would the hydrogen come from in a situation like this? I know aluminum will produce hydrogen under basic or acid condition, but steel doesn't (I think).
- Someone 11y agoI think from a reaction 2Fe + 3H2O -> Fe2O3 + 3H2 See http://www.madsci.org/posts/archives/2005-12/1134348446.Ch.r.html http://www.madsci.org/posts/archives/2005-12/1134348446.Ch.r...