Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 672, Issue -, Pages 147-154Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.02.101
Keywords
Duplex stainless steel; Intergranular corrosion; Precipitates
Categories
Funding
- National Natural Science Foundation of China [71401106]
- Shanghai Natural Science Foundation [14ZR1418700]
- Shanghai First-class Academic Discipline Project [S1201YLXK]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20123120120005]
- Foundation for Fostering Young Teachers in Higher Education Institutions of Shanghai [slg12010]
- Innovation Program of Shanghai Education Commission [14YZ090]
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The effect of aging at 700 degrees C for various times on the intergranular corrosion behavior of LDX 2404 duplex stainless steel is investigated by morphological observation and electrochemical detection. Scanning electronic microscopy and transmission electronic microscopy analysis reveal that Cr2N, M23C6 and the sigma and chi phases nucleate simultaneously at the initial stages of aging. The granular particles of sigma phase grow larger but fewer with the increase of aging time. The electrochemical detection results show that intergranular corrosion become more severe and the corrosion type evolves from intergranular corrosion into general corrosion as the holding time extends to 48 h. (C) 2016 Elsevier B.V. All rights reserved.
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