Improvement of anti-corrosive and anti-oxidative properties of electroless Ni-P coating. (3rd October 2019)

• Record Type: Journal Article
• Authors: Shan, Limei; Li, Yanli; Miao, Jingguo; Wu, Juying; Zhai, Kaihua; Wang, Xinyin
• Is Part Of: Surface engineering. Volume 35:Number 10(2019)
• Page Start: 833
• Page End: 840
• Publication Date: 2019-10-03
• Subjects: Chromate-free -- electroless Ni-P coating -- vanadium conversion coating -- anti-corrosive property -- anti-oxidative property; Surfaces (Technology) -- Periodicals; Coatings -- Periodicals; 620.4405
• DOI: 10.1080/02670844.2017.1399546
• Languages: English
• ISSNs: 0267-0844

Abstract

ABSTRACT: In order to improve the anti-corrosive and anti-oxidative properties of electroless Ni-P coating (ENPC), a vanadium conversion coating (VCC) was fabricated on the surface of the ENPC. SEM images and EDX line scanning spectra indicate that as-prepared VCC is supposed to be a thin film with a thickness of a few nanometres. XPS analyses demonstrate that the VCC is mainly consisted of V2 O5 or V2 O5 · n H2 O. The acid exposure test data indicate that the VCC-treated ENPC, compared with the pristine one, demonstrates a highly enhanced anti-oxidative property. Furthermore, the result of neutral salt spray test manifests that the VCC-treated ENPC has also a highly enhanced anti-corrosive property, which is further confirmed by the result of electrochemical corrosion test.