In:
Materials and Corrosion, Wiley, Vol. 69, No. 11 ( 2018-11), p. 1509-1515
Abstract:
Bulk metallic glasses have been studied and developed as engineering materials due to their outstanding mechanical properties. Corrosion resistance of the bulk metallic glasses is a crucial factor to be considered for their practical applications. In recent years, corrosion properties of a series of amorphous alloys and their crystalline counterparts in corrosive solutions have been reported, but researches on Pd‐based alloys are rare. In this paper, the corrosion behaviors of the amorphous and crystalline Pd 40.5 Ni 40.5 P 19 and Pd 77.5 Cu 6 Si 16.5 alloys in simulated seawater were investigated. It is found that the surface of both amorphous and crystalline Pd 40.5 Ni 40.5 P 19 alloys is uniformly corroded without pitting. The corrosion resistance of the crystalline Pd 40.5 Ni 40.5 P 19 alloy is superior than that of the amorphous Pd 40.5 Ni 40.5 P 19 alloy due to the inert phosphides and noble palladium phases formed after crystallization. However, different‐sized pitting holes are found on the surface of both amorphous and crystalline Pd 77.5 Cu 6 Si 16.5 alloys, and the amorphous Pd 77.5 Cu 6 Si 16.5 alloy shows better corrosion resistance than its crystalline counterpart. This phenomenon may be associated with Cu‐rich phase on the surface of the crystalline Pd 77.5 Cu 6 Si 16.5 alloy, which promotes the nucleation of the pitting.
Type of Medium:
Online Resource
ISSN:
0947-5117
,
1521-4176
DOI:
10.1002/maco.201810072
Language:
English
Publisher:
Wiley
Publication Date:
2018
detail.hit.zdb_id:
1481051-7
detail.hit.zdb_id:
1224916-6
detail.hit.zdb_id:
202688-0
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