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Advances in Materials Science and Engineering
Volume 2018, Article ID 3676598, 7 pages
https://doi.org/10.1155/2018/3676598
Research Article

Electrochemical Determination of Hydrogen Entry to HSLA Steel during Pickling

Department of Chemical Engineering and Metallurgy, School of Chemical Technology, Aalto University, P.O. Box 16200, Aalto 00076, Finland

Correspondence should be addressed to Jari Aromaa; if.otlaa@aamora.iraj

Received 3 November 2017; Accepted 23 January 2018; Published 7 March 2018

Academic Editor: Jun Liu

Copyright © 2018 Jari Aromaa et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Pickling with hydrochloric acid is a standard method to clean steel surfaces before hot-dip galvanizing. When normal low strength steels are pickled, hydrogen formed in pickling reactions does not have any significant harmful effect on the mechanical properties of steel. However, in pickling of steels with higher strength, the penetration of hydrogen into the steel may cause severe damages. The effect of pickling of high-strength low-alloy (HSLA) steels was investigated using a cell construction based on the Devanathan-Stachurski method with modified anodic surface treatment and hydrogen production using acid. The penetration and the permeability of hydrogen were measured using an electrochemical cell with hydrochloric acid on the one side of the steel sample and a solution of NaOH on the other side. No protective coating, for example, palladium on the anodic side of the sample, is needed. The penetration rate of hydrogen into the steel and exit rate from the steel were lower for higher strength steel.