Hydrogen embrittlement of prestressing cables

M. Perrin (1, 2) , L. Gaillet (3) , C. Tessier (4) , Hassane Idrissi (5)

1 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)
2 EA 4050 - Recherches en Psychopathologie, nouveaux symptômes et lien social
3 IFSTTAR/MAST/SMC - Structures Métalliques et à Cables
4 ONERA - The French Aerospace Lab [Toulouse]
5 MATEIS - Matériaux, ingénierie et science [Villeurbanne]

In this study, hydrogen embrittlement is simulated in an accelerated way with an ammonium thiocyanate media test. Damage evolution of prestressing strand is monitored with electrochemical measurements and with acoustic emission (AE). Three stages of the damage mechanism are identified with different acoustic activities. For each stage, three pattern parameters coming from AE analyse are highlighted to distinguish each emitting stage. To have a precise description of damage evolution of prestressing cables during the hydrogen embrittlement test, some interrupted tests have been used. For each interruption, metallographic observations enable to characterize degradation mechanisms. Finally, each acoustic stage has been correlated to a degradation mechanism. © 2010 Elsevier Ltd. All rights reserved.

Mots clés: Prestressing cables; Prestressing strands; SEM; Stress corrosion; Three stages; Acoustic emission testing; Acoustic emissions; Ammonium compounds; Cables; Degradation; Electrochemical corrosion; Hydrogen; Prestressed beams and girders; Prestressing; Residual stresses; Steel metallurgy; Stress corrosion cracking; Hydrogen embrittlement; Metallographic observations; Low alloy steels; Electrochemical measurements; Damage evolution; Damage mechanism; Degradation mechanism; Acoustic activity; Ammonium thiocyanate; B. EIS

Domaines: Matériaux

M. Perrin, L. Gaillet, C. Tessier, Hassane Idrissi. Hydrogen embrittlement of prestressing cables. Corrosion Science, 2010, 52 (6), pp.1915-1926. ⟨10.1016/j.corsci.2010.02.041⟩. ⟨hal-01813937⟩