Pickling kinetics of tertiary oxide scale formed on hot-rolled steel strip


  • Yubonrat Jatuphaksamphan Faculty of Engineering, Chulalongkorn University
  • Natthapong Phinichka Faculty of Science, Srinakharinwirot University
  • Kritsada Prapakorn National Metal and Materials Technology Center, Klong Luang
  • Mawin Supradist Faculty of Engineering, Chulalongkorn University


Oxide scale, Hot-rolled steel strip, Scale dissolution rate


During hot rolling process a steel strip covers with oxide scales. These scales have to be removed by acid pickling process. This work focuses on the study of the scale removing rate of a hot-rolled steel strip in order to find an expression explaining the rate of reaction in hydrochloric acid. The study of scale removal is accomplished by utilizing the pickling simulator with different acid concentrations and pickling temperatures.

There are two approaches that can be used to find a scale removing rate; the measurement of weight change and the iron concentration change after the pickling process. In this work, the measurement of the change of iron concentration was selected because it represents the actual amount of the scale removed after the pickling process. The experimental data were used to derive the expression for the rate constants. By using these expressions, the pickling equations can be obtained. These equations are capable of predicting the maximum removable scale thickness during the pickling process for several pickling conditions; i.e. time needed for scale removal.


Metrics Loading ...


Chen, R.Y. and Yuen, W.Y.D. 1999. Effects of finishing and coiling temperatures on the scale structure and picklability of hot-rolled strip. 41st MWSP Conf. Proc. 37 : 697-705.

Chen, R.Y. and Yuen, W.Y.D. 2000. A study of the scale structure of hot-rolled steel strip by simulated coiling and cooling. Oxid. Met. 53(5-6) : 539-560.

Chen, R.Y. and Yuen, W.Y.D. 2001. Oxide-scale structures formed on commercial hot-rolled steel strip and their formation mechanisms. Oxid. Met. 56(1-2): 89-118.

Chen, R.Y. and Yuen, W.Y.D. 2002. Oxidation of low-carbon, low-silicon mild steel at 450-900°C under conditions relevant to hot-strip processing. Oxid. Met. 57 : 53-79.

Chen, R.Y. and Yuen, W.Y.D. 2002. On the pickling mechanisms of hot-rolled steel strip. 44th MWSP Conf. Proc. 40 : 1077-1089.

Chen, R.Y. and Yuen, W.Y.D. 2003. Review of the high-temperature oxidation of iron and carbon steels in air of oxygen. Oxid. Met. 59(6) : 433-468.

Chen, R.Y., Yuen, W.Y.D. and Hull, R. 2003. Effects of hot rolling conditions and scale breaking on the pickling performance of hot-rolled steel strip. SEAISI Q. 29 : 68-82.

Chen, R.Y., Yuen, W.Y.D. and Mak, T. 2001. Oxide scale growth and its pickling characteristics of hot-rolled steel strip. 43rd MWSP Conf. Proc. 39 : 287-299.

Hudson, R.M. 1982. Pickling and Descaling. In : ASM Handbook. 9th ed. 5 : 68-82.

Kizu, T., Nagataki,Y., Inazumi, T. and Hosoya Y. 2001. Effects of chemical composition and oxidation temperature on the adhesion of scale in plain carbon steels. ISIJ Int. 41 : 1494-1501.

Yamaguchi, S., Yoshida, T. and Saito, T. 1994. Improvement in descaling of hot strip by hydrochloric acid. ISIJ Int. 34(8) : 670-678.




How to Cite

Y. Jatuphaksamphan, N. Phinichka, K. . Prapakorn, and M. Supradist, “Pickling kinetics of tertiary oxide scale formed on hot-rolled steel strip”, J Met Mater Miner, vol. 20, no. 1, Apr. 2017.



Original Research Articles

Most read articles by the same author(s)