Study of the Acid Pickling of Low-Alloyed Steels by Using a Descaling Workstation Simulating the Production Line

A laboratory‐scale device was constructed for treating small‐size steel sheet specimens in an analogous manner to the acid pickling production line. This descaling simulator comprises three tanks for hydrochloric acid and another one for rinsing the samples, providing an automated sample transfer wi...

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Bibliographic Details
Published in:	Steel research international Vol. 86; no. 7; pp. 704 - 715
Main Authors:	Péter, László, Sánta, Orsolya, Koós, Gabriella, Földi, József, Verő, Balázs, Bátonyi, József, Schwarczenbarth, Petra, Mach, Kornél, Kardos, Ibolya, Gyerák, Gergely G., Vehovszky, Balázs, Lerner, Robert D.
Format:	Journal Article
Language:	English
Published:	Weinheim Blackwell Publishing Ltd 01-07-2015 Wiley Subscription Services, Inc
Subjects:	Assembly lines Descaling descaling of low-alloyed steels hydrochloric acid pickling modeling of a production line Pickling Production lines Samples scale thickness distribution Simulation simulator device Statistical analysis Statistical methods Steel alloys Structural steels
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Summary:	A laboratory‐scale device was constructed for treating small‐size steel sheet specimens in an analogous manner to the acid pickling production line. This descaling simulator comprises three tanks for hydrochloric acid and another one for rinsing the samples, providing an automated sample transfer with a free selection of all processing parameters such as motion rate, residence time, temperature, etc. A detailed description of the simulator device will be given. Besides the pickling loss which was the primary parameter measured, surface roughness of the samples, Raman spectrum of the surface, and scale thickness were also determined in some cases. Scale‐related pickling loss and overpickling rate were determined for a number of steel qualities. The role of the pickling liquors of each tank was studied, and the descaling efficiency at various acid temperatures was assessed. A statistical analysis was used for estimating the fluctuation in the scale thickness on the hot‐rolled specimens. Results obtained with the descaling simulator were also checked with an optical imaging of the scale and a composition depth profile analysis. The scale thickness obtained from weight loss measurement was in good agreement with the direct scale thickness measurement. A laboratory‐scale workstation has been constructed to study the acid pickling of steel sheets under conditions that are analogous to the production line. The weight loss due to the scale removal as well as the overpickling rate has been measured for various steel grades. The role of various process parameters like immersion time and pulling rate has been studied.
Bibliography:	ArticleID:SRIN201400564 istex:948A7F39A579626FBAF56DF0CD2DE58BE2F2D27E ark:/67375/WNG-SKNP11TK-L ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1611-3683 1869-344X
DOI:	10.1002/srin.201400564