Analysis of causes for surface tarnishing of 304 pickling plate

CHEN Pei-dun; TANG Xu-wei; LI Chao; ZHANG Shuang; WU Yue-long

doi:10.13374/j.issn1001-053x.2014.s1.040

Volume 36 Issue S1

Jul. 2021

Turn off MathJax

Article Contents

Article Navigation > Chinese Journal of Engineering > 2014 > 36(S1): 218-221

CHEN Pei-dun, TANG Xu-wei, LI Chao, ZHANG Shuang, WU Yue-long. Analysis of causes for surface tarnishing of 304 pickling plate[J]. Chinese Journal of Engineering, 2014, 36(S1): 218-221. doi: 10.13374/j.issn1001-053x.2014.s1.040

Citation:

CHEN Pei-dun, TANG Xu-wei, LI Chao, ZHANG Shuang, WU Yue-long. Analysis of causes for surface tarnishing of 304 pickling plate[J]. Chinese Journal of Engineering, 2014, 36(S1): 218-221. doi: 10.13374/j.issn1001-053x.2014.s1.040

Citation:

PDF( 629 KB)

Analysis of causes for surface tarnishing of 304 pickling plate

doi: 10.13374/j.issn1001-053x.2014.s1.040

1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Shandong Taishan Iron and Steel Group Co. Ltd., Laiwu 271100, China

Received Date: 2013-11-18
Available Online: 2021-07-19

Abstract

Abstract

The surface tarnishing phenomenon was analyzed. The main inclusions are type A and type C determined by metallographic analysis. Serious intergranular corrosion was found in surface tarnishing 304 plate after annealing and pickling. After solution treatment and pickling test,the amount of ferrite decreases significantly,little carbide precipitation happens,and surface tarnishing phenomenon decreases. The result shows that the improper annealing results in carbide enrichment on the grain boundary and sensitization of material,which lead to intergranular corrosion when pickling,and then surface tarnishing of 304 pickling plate.
- 304 pickling plate,
- carbide,
- solution treatment