Beneficial role of chloride ions during pickling of steel in sulfuric acid
- National Metallurgical Lab., Jamshedpur (India). Corrosion Protection Div.
Sodium chloride was shown to have a beneficial effect on the pickling of mild steel in different concentrations of sulfuric acid at various temperatures and ferrous sulfate (FeSO{sub 4}{center_dot}7H{sub 2}O) accumulations in the bath. Addition of this salt to the H{sub 2}SO{sub 4} bath drastically reduced metal loss, enhanced the pickling rate, removed scale quickly, and improved the surface finish of the pickled material. Addition of hydrochloric acid instead of NaCl, however, accelerated the corrosion rate of mild steel in the uninhibited acid solution but had a negligible effect in the inhibited solution. The beneficial effect of NaCl was discussed based upon electrochemical parameters.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 201377
- Journal Information:
- Corrosion, Journal Name: Corrosion Journal Issue: 2 Vol. 52; ISSN 0010-9312; ISSN CORRAK
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of inhibitors on scale removal in HCl pickling solutions
PICKLING OF THE ZIRCALOYS PRIOR TO CORROSION EXPOSURE