Title: Mechanism of single and multiple step pickling of 304 stainless steel in acid electrolytes
Authors: Li, LF ×
Caenen, P
Daerden, M
Vaes, David
Meers, G
Dhondt, C
Celis, Jean-Pierre #
Issue Date: May-2005
Publisher: Elsevier
Series Title: Corrosion Science vol:47 issue:5 pages:1307-1324
Abstract: Pickling of oxidised 304 stainless steel in single or multiple electrolytes was investigated based on weight loss and corrosion potential measurements. A smooth surface finish was obtained after an extended pickling in HCl, but some external oxide scales remained. On pickling in HF, the external oxide scales were fully removed, but internal oxide scales remained, and intergranular corrosion took place. Multi-step pickling in successive HCl and HF electrolytes allowed achieving a smooth surface finish free of any oxide scales. The sequence and duration of pickling steps in such multi-step pickling greatly influenced the final surface finish. Corrosion potential of oxidised stainless steel in both electrolytes could differ, and that difference leaded to a uniform pickling of stainless steel in HCl and a localised pickling in HF. (c) 2004 Elsevier Ltd. All rights reserved.
ISSN: 0010-938X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Chemical and Extractive Metallurgy Section (-)
Production Engineering, Machine Design and Automation (PMA) Section
× corresponding author
# (joint) last author

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