View in EDS

Perspectives on the unusual electrochemical corrosion of Nickel Aluminum Bronze (NAB) alloy fabricated through laser-powder bed fusion additive manufacturing.

Saved in:
Bibliographic Details
Title: Perspectives on the unusual electrochemical corrosion of Nickel Aluminum Bronze (NAB) alloy fabricated through laser-powder bed fusion additive manufacturing.
Authors: Morshed-Behbahani, Khashayar1 (AUTHOR) kmorshed@dal.ca, Rayner, Addison J.1 (AUTHOR), Bishop, Donald Paul1 (AUTHOR), Nasiri, Ali1 (AUTHOR) ali.nasiri@dal.ca
Source: Corrosion Science. Mar2024, Vol. 228, pN.PAG-N.PAG. 1p.
Subjects: Aluminum bronze, Heat treatment, Corrosion resistance, Nickel, Residual stresses
Abstract: This research delves into the passivation and electrochemical corrosion response of as-printed and annealed L-PBF NAB, comparing their performance with wrought NAB counterparts. The results unveil that the interplay between microstructural uniformity, higher aluminum content, residual stress, and the presence of martensitic nanotwins substantially enhances the integrity of the corrosion film and improves the uniform corrosion resistance of as-fabricated NAB. Nonetheless, this combination adversely impacts the localized corrosion resistance. Remarkably, annealing, despite its detrimental effect on passivation and uniform corrosion behavior, ameliorates resistance to localized attacks. In contrast, the wrought equivalents exhibit inferior electrochemical corrosion performance across all experimental conditions. [Display omitted] • Altered electrochemical corrosion response after prolonged NaCl immersion. • Pseudo-passivity observed in all NAB samples subjected to long-term exposure. • As-printed NAB highly resistant to uniform corrosion, yet vulnerable to localized attack. • Annealing improves localized corrosion behavior of as-built NAB. • Similar chronovoltammetry response regardless of heat treatment and processing route in NAB. [ABSTRACT FROM AUTHOR]
Copyright of Corrosion Science is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:This research delves into the passivation and electrochemical corrosion response of as-printed and annealed L-PBF NAB, comparing their performance with wrought NAB counterparts. The results unveil that the interplay between microstructural uniformity, higher aluminum content, residual stress, and the presence of martensitic nanotwins substantially enhances the integrity of the corrosion film and improves the uniform corrosion resistance of as-fabricated NAB. Nonetheless, this combination adversely impacts the localized corrosion resistance. Remarkably, annealing, despite its detrimental effect on passivation and uniform corrosion behavior, ameliorates resistance to localized attacks. In contrast, the wrought equivalents exhibit inferior electrochemical corrosion performance across all experimental conditions. [Display omitted] • Altered electrochemical corrosion response after prolonged NaCl immersion. • Pseudo-passivity observed in all NAB samples subjected to long-term exposure. • As-printed NAB highly resistant to uniform corrosion, yet vulnerable to localized attack. • Annealing improves localized corrosion behavior of as-built NAB. • Similar chronovoltammetry response regardless of heat treatment and processing route in NAB. [ABSTRACT FROM AUTHOR]
ISSN:0010938X
DOI:10.1016/j.corsci.2024.111846