Corrosion Crack Nucleation Mechanism in the Welded Structures of X65 Steel in Natural Seawater
Joint Authors
Bai, Linyue
Gao, Lei
Jiang, Kebin
Source
Advances in Materials Science and Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-08-13
Country of Publication
Egypt
No. of Pages
14
Abstract EN
The nucleation mechanism of corrosion cracks in welded structures in natural seawater has been revealed through investigation on the corrosion behavior of X65-welded structures in natural seawater.
The evolution laws of surface corrosion morphology, residual stress, and areas of welded structures with the most serious corrosion damage were analyzed by microstructure observation, corrosion morphology observation, residual stress detection, and magnetic field detection.
The results show that the main factors of determining surface corrosion morphology evolution law of welded structures are microstructures of the weld joint, heat-affected zone (HAZ), and the fusion line.
Due to the difference of corrosion rates between the weld joint, HAZ, and the coarse Widmänstatten structure in fusion line, the fusion line of welded structures receives the most serious damage while being corroded.
Meanwhile, mutual reinforcement of residual stress and corrosion damage on the surface of welded structures further accelerate the nucleation of corrosion cracks.
Under the influences of microstructure, residual stress, and corrosion, corrosion cracks that are parallel to weld joints generate first in the fusion line of welded structures.
Therefore, it makes welded structures the source of marine steel structures’ corrosion failure.
American Psychological Association (APA)
Bai, Linyue& Gao, Lei& Jiang, Kebin. 2018. Corrosion Crack Nucleation Mechanism in the Welded Structures of X65 Steel in Natural Seawater. Advances in Materials Science and Engineering،Vol. 2018, no. 2018, pp.1-14.
https://search.emarefa.net/detail/BIM-1122236
Modern Language Association (MLA)
Bai, Linyue…[et al.]. Corrosion Crack Nucleation Mechanism in the Welded Structures of X65 Steel in Natural Seawater. Advances in Materials Science and Engineering No. 2018 (2018), pp.1-14.
https://search.emarefa.net/detail/BIM-1122236
American Medical Association (AMA)
Bai, Linyue& Gao, Lei& Jiang, Kebin. Corrosion Crack Nucleation Mechanism in the Welded Structures of X65 Steel in Natural Seawater. Advances in Materials Science and Engineering. 2018. Vol. 2018, no. 2018, pp.1-14.
https://search.emarefa.net/detail/BIM-1122236
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1122236