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

S. Maeng, L. Axe, T. A. Tyson

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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
Issue number4
StatePublished - 2002

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering
  • General Materials Science


  • 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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