Effect of inhibitors on scale removal in HCl pickling solutions
Inhibitors are available which effectively reduce the loss of metal because of corrosion occurring in the hydrochloric acid pickling baths. Selection of these inhibitors, however, must take into consideration the effect the inhibitor will have on scale dissolution. The optimum concentration of inhibitor must consider the functional relationship between inhibitor concentration and the rate of scale removal. This relationship is not the same as that between inhibitor concentration and metal dissolution rate. Data are shown on scale dissolution rates for 2 corrosion inhibitors in 10% by wt hydrochloric acid at temperatures of 55-85$C (131$-185$F). Extrapolations to somewhat higher temperatures of some pickling operations can be made. However, it was observed that all corrosion inhibitor effects on scale removal became somewhat temperature-dependent at, or near, 80$C. The experimental acid corrosion inhibitors (B and C) exhibit surfactant behavior between 55-75$C, removing scale more quickly than did the uninhibited acid.
- Research Organization:
- Continental Oil Co; North Texas State Univ
- OSTI ID:
- 6271377
- Journal Information:
- Corrosion; (United States), Journal Name: Corrosion; (United States) Vol. 24:2; ISSN CORRA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of acid-corrosion inhibitors on the pickling of scale from steels
Corrosion damage of the surface of high-speed tool steel in acid-inhibitor pickling
Related Subjects
360105* -- Metals & Alloys-- Corrosion & Erosion
CONTROL
CORROSION INHIBITORS
CORROSION PICKLING
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MEDIUM TEMPERATURE
OIL WELLS
PETROLEUM
PICKLING
SCALE CONTROL
STIMULATION
SURFACE TREATMENTS
WELL COMPLETION
WELL STIMULATION
WELLS