Characterization of gun-barrel steel corrosion as a function of time in concentrated hydrochloric acid solution

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Abstract

The corrosion behavior of gun-barrel steel in 37.8% hydrochloric acid (HCI) at room temperature was investigated as a function of exposure time by several methods, including mass loss measurement, atomic absorption spectrometer (AAS), x-ray diffraction (XRD), scanning electron microscopy (SEM)/ energy dispersive x-ray analysis (EDX), x-ray fluorescence (XRF), and x-ray absorption fine structure (XAFS). The corrosion rate showed unsteady-state behavior: however, time had no significant effect on the composition of corrosion product. XRD analyses of this surface corrosion indicated the formation of akaganeite (β-FeOOH). Fluorescence XAFS studies revealed that the iron coordination environment in the steel was similar to that of the body-centered cubic (bcc) iron. Surface sensitive total electron yield (TEY) XAFS showed that the structure of the corrosion product was invariant as a function of exposure time.

Original languageEnglish (US)
Pages (from-to)370-380
Number of pages11
JournalCorrosion
Volume58
Issue number4
DOIs
StatePublished - Jan 1 2002

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

Keywords

  • Atomic absorption spectrometer
  • Energy dispersive x-ray analysis
  • Hydrochloric acid
  • Scanning electron microscopy
  • Total electron yield
  • X-ray absorption fine structure
  • X-ray diffraction
  • X-ray fluorescence

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