, Volume 34, Issue 2, pp 65–70 | Cite as

Effect of Strip Velocity on Pickling Rate of Hot-Rolled Steel in Hydrochloric Acid

  • R. M. Hudson
  • C. J. Warning
Process Metallurgy


The combined effect of strip velocity with other parameters on pickling rate of hot-rolled low-carbon steel in hydrochloric acid (HCl) solutions was determined. At temperatures from 150 to200°F(66 to 93°), the time required for pickling decreased substantially as strip velocity was increased from 0 to about 250 fpm (76 mpm); no further decrease in time resulted when velocities were increased to 800 fpm (244 mpm). Other pickling variables were studied with a velocity of 400 fpm (122 mpm). Pickling times decrease with increases in HCl concentrations, CHCl, and temperature, TF, according to prediction equations of the form log t = A + B log CHCl + D(459 + TF)−1. At 200°F, temper-mill scalebreaking decreased pickling times by about 5 sec; at lower temperatures, a larger magnitude effect was noted for one steel in the group tested.


Specimen Holder Scale Removal Large Magnitude Effect Descale Time Strip Speed 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    R.M. Hudson, D.W. Brown, and C.J. Warning, “Factors Influencing the Pickling Time Required for Hot-Rolled Steel Strip,” J. of Metals, 19,(3), 1967, pp. 9–13.Google Scholar
  2. 2.
    R.M. Hudson and C.J. Warning, “Discussion of Scale Removal in HCl,” Corrosion, 24(7), 1968, p. 222.CrossRefGoogle Scholar
  3. 3.
    R.M. Hudson and C.J. Warning, “Minimizing Fuming During Pickling With Hydrochloric Acid,” Sheet Metal Industries, 46(6), 1969, p. 523.Google Scholar
  4. 4.
    R.M. Hudson and C.J. Warning, “Factors Influencing the Pickling Rate of Hot-Rolled Low-Carbon Steel in Sulfuric and Hydrochloric Acids,” Metal Finishing, 78(6), 1980, pp. 21–28.Google Scholar
  5. 5.
    W. Whitmore, R. Russell, C. Welling, and J. Cochrane, Ind. Eng. Chem. 15 (1923), p. 672.CrossRefGoogle Scholar
  6. 6.
    Lange’s Handbook, 11th Editiion, McGraw-Hill Book Co., (1973), pp. 10–97.Google Scholar
  7. 7.
    L.A. Shevchenko and V.V. Zelinskii, “Cleaning of the Surface of Hot-Rolled Strips in a Stream of Acid Solutions,” Stahl’ (1981), (1), 68–9 (Russian) (Chemical Abstracts, 94, 143304d, 1981).Google Scholar

Copyright information

© The Minerals, Metals & Materials Society 1982

Authors and Affiliations

  • R. M. Hudson
  • C. J. Warning

There are no affiliations available

Personalised recommendations