Pickling of AISI 316L stainless steel using and ecological mixture of H2O2-H2SO4-HF
DOI:
https://doi.org/10.3989/revmetalm.2005.v41.iExtra.1067Keywords:
Pickling AISI 316L stainless steel, Hydrogen peroxide, p-Toluene sulphonic acidAbstract
This study reports the pickling of austenitic AISI 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 °C. The pickling rate at 50 °C in the presence and absence of 40 g/l ferric ion was 2.6 and 0.2 mg/dm2 day (mdd), respectively. p-Toluene sulphonic acid was used as stabilizer of H2O2.
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