Pickling of AISI 316L stainless steel using and ecological mixture of H2O2-H2SO4-HF

L Narvaez, E Cano, D M Bastidas, P P Gomez

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Abstract

This study reports the pickling of austenitic AISl 316L stainless steel (SS) using a mixture of hydrogen peroxide (H2O2), sulphuric acid (H2SO4) and hydrofluoric acid (HF) at pH 2.0. The stability of H2O2 was also studied using different concentrations of ferric ion from 0 to 40 g/l and temperature from 25 to 60 degrees C. The pickling rate at 50 degrees C in the presence and absence of 40 g/l ferric ion was 2.6 and 0.2 mg/dm(2) day (mdd), respectively. p-Toluene sulphonic acid was used as stabilizer of H2O2.

Original languageEnglish
Pages (from-to)417-422
Number of pages6
JournalRevista de Metalurgia
Publication statusPublished - 2005

Keywords

  • pickling AISI 316L stainless steel
  • hdrogen peroxide
  • p-toulene
  • sulphonic acid

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