Effects of chloride ion addition on the pickling of hot-rolled steels in fluoboric acid solution

Cited 2 time in webofscience Cited 0 time in scopus
  • Hit : 396
  • Download : 0
Effects of chloride ion addition to, fluoboric acid (HBF4) solution on the pickling of a high-strength, hot-rolled steel were investigated by using open-circuit potential transient technique and alternating current (AC) impedance spectroscopy. The occurrence of an open-circuit potential plateau indicated dominant dissolution of one oxide phase in the scale. In contrast, the open-circuit potential decay was. caused by the simultaneous dissolution of two oxide phases in the scale. Thus, the shape of the open-circuit potential transient was determined crucially by the oxide scale structure. Time to reach a steady-state value of open-circuit potential decreased with increasing chloride ion concentration, indicating accelerated descaling. The decrease in the electrical resistance of the oxide scale estimated from AC impedance spectra also suggested that dissolved chloride ions accelerate descaling. From the experimental findings, it was concluded that the addition of chloride ions to HBF4 solution accelerates descaling and simultaneously impedes the subsequent dissolution of the bare steel in the pickling process.
Publisher
NATL ASSN CORROSION ENG
Issue Date
2003-02
Language
English
Article Type
Article
Keywords

ELECTROCHEMICAL-BEHAVIOR; REPASSIVATION KINETICS; CARBON-STEEL; CORROSION BEHAVIOR; ALUMINUM; SULFATE; ELECTROLYTE; DISSOLUTION; ALLOYS; IRON

Citation

CORROSION, v.59, no.2, pp.146 - 154

ISSN
0010-9312
URI
http://hdl.handle.net/10203/79488
Appears in Collection
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 2 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0