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Study of the Acid Pickling of Low‐Alloyed Steels by Using a Descaling Workstation Simulating the Production Line
Author(s) -
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.
Publication year - 2015
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201400564
Subject(s) - pickling , materials science , residence time (fluid dynamics) , surface roughness , metallurgy , surface finish , scale (ratio) , composite material , engineering , geotechnical engineering , physics , quantum mechanics
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.