In:
Corrosion, Association for Materials Protection and Performance (AMPP), Vol. 73, No. 9 ( 2017-09-01), p. 1107-1118
Abstract:
The influences of co-deposited Ti particles on corrosion behavior of electrodeposited Ni-Ti coatings were investigated. The co-deposited Ti particles caused the refined crystallite size and random-oriented texture of Ni-Ti coating. In 3.5 wt% sodium chloride (NaCl) solution, the buried Ti particles in Ni matrix blocked the corrosion path and rapid intercrystalline corrosion. The inert TiO2 could form on the exposed Ti particles and hinder localized corrosion. In 10 wt% sodium hydroxide (NaOH) solution, Ni matrix crystallites, refined by co-deposited Ti particles, contributed to formation of the passive Ni(OH)2 film. The corrosion current of Ni-Ti coating decreased by about one order of magnitude in both solutions with respect to pure Ni coating, demonstrating the co-deposited Ti particles greatly improved the corrosion resistance of Ni-Ti composite coatings. Finally, a corrosion mechanism was built to explain the co-deposited Ti particles improved corrosion resistance of the Ni-Ti composite coatings.
Type of Medium:
Online Resource
ISSN:
0010-9312
,
1938-159X
Language:
English
Publisher:
Association for Materials Protection and Performance (AMPP)
Publication Date:
2017
detail.hit.zdb_id:
217266-5
detail.hit.zdb_id:
2043065-6
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