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Corrosion behavior of typical hot rolled sheets in humid storage environments

Yun Bai (School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, China and Jiangyin Xingcheng Special Steel Works Co, Beijing, China)
Baozhuang Sun (Key Laboratory for Corrosion and Protection (MOE), Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, China)
Wenzhu Huangfu (China Ship Scientific Research Center, Wuxi, China)
Xianjin Sun (Jiangyin Xingcheng Special Steel Works Co, Beijing, China)
Zhiyong Liu (Key Laboratory for Corrosion and Protection (MOE), Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, China and National Materials Corrosion and Protection Data Center, Beijing, China)
Cuiwei Du (National Materials Corrosion and Protection Data Center, Beijing, China)
Xiaogang Li (National Materials Corrosion and Protection Data Center, Beijing, China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 1 June 2022

Issue publication date: 4 August 2022

116

Abstract

Purpose

The purpose of this paper was to study the relationship between safe storage life and storage mode of hot-rolled sheet (Q235, X70) in humid environment, and a prediction model of safe storage life under different storage modes was established.

Design/methodology/approach

The corrosion behavior of hot-rolled sheets under different storage conditions was studied with immersion experiment and morphology observation.

Findings

The results show that pitting occurs on the hot-rolled sheets in humid environment, and the corrosion behavior is strongly related with the storage mode. When they are stored separately, the number and depth of pits first increase and then decrease as the Cl concentration rises, while for the stack storage, pit depth increases with increasing Cl concentration. The safe storage time of separate storage is longer than that of stack storage. Based on this, a model of chloride ion concentration and storage life was established.

Originality/value

A storage safe life model of hot-rolled sheet in humid environment is proposed.

Keywords

Citation

Bai, Y., Sun, B., Huangfu, W., Sun, X., Liu, Z., Du, C. and Li, X. (2022), "Corrosion behavior of typical hot rolled sheets in humid storage environments", Anti-Corrosion Methods and Materials, Vol. 69 No. 5, pp. 453-462. https://doi.org/10.1108/ACMM-01-2022-2592

Publisher

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Emerald Publishing Limited

Copyright © 2022, Emerald Publishing Limited

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