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Influence of tensile stress on corrosion behaviour of high‐strength galvanized steel bridge wires in simulated acid rain
Author(s) -
Yang W. J.,
Yang P.,
Li X. M.,
Feng W. L.
Publication year - 2012
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201005921
Subject(s) - galvanization , materials science , corrosion , ultimate tensile strength , metallurgy , polarization (electrochemistry) , electrochemistry , electrolyte , composite material , layer (electronics) , electrode , chemistry
Corrosion behaviour of the high‐strength galvanized steel wires under tensile stress was researched by electrochemical polarization and salt spray test (SST) using simulated acid rain as electrolyte. Electrochemical polarization and SST results showed corrosion rate rose significantly with increasing tensile stress; white grains were observed by SEM after polarization, while cellular and dendritic crystals appeared on the rust layer after SST. XRD and TG‐DTA results revealed (Zn(OH) 2 ) 3 · ZnSO 4 · 5H 2 O was the main corrosion product, and traces of Fe 2 (SO 4 ) 2 O · 7H 2 O, Fe 2 (SO 4 ) 3 , Fe 2 O 3 · H 2 O were also detected. A three‐stage corrosion process for the galvanized steel wires during SST was proposed.