Effect of annealing temperature on the corrosion resistance of electroless produced Ni-B-W coatings

Rasid Ahmed Yildiz, Ali Göksenli, Behiye Yüksel, Faiz Muhaffel, Ali Aydeniz

Araştırma sonucu: ???type-name???Konferans katkısıbilirkişi

17 Atıf (Scopus)

Özet

The present work deals with the formation of Ni-B-W coating on steel by electroless plating process and evaluation of their corrosion resistance after applying heat treatments at different temperatures for 1 h. The Ni-B-W coating was prepared using alkaline borohydridereduced electroless nickel bath. Scanning electron microscopy of the surface cross-sectional view of the electroless Ni-B-W coating was analyzed and layer characteristics was investigated. Coating structure was investigated using XRD. The study reveals that the Ni-B-W coating is amorphous in their as-plated condition and upon heat treatment at 400°C for 1 h, Ni-B-W coating crystallize and produce nickel and nickel borides in the coatings. Annealing temperature dependence of the corrosion resistance of the coating was investigated by potentiodynamic polarisation measurements. These results show that the Ni-B-W coating annealed at 650°C exhibit better corrosion resistance than those of coatings with other annealing temperature. The corrosion resistance increased after the crystallisation of the coating, due to factors like; decrease of porosity and internal stress and the formation of tungsten oxide on the surface acting as a protective layer.

Orijinal dilİngilizce
Ana bilgisayar yayını başlığı2012 International Conference on Engineering Materials, ICEM 2012
Sayfalar263-268
Sayfa sayısı6
DOI'lar
Yayın durumuYayınlandı - 2013
Etkinlik2012 International Conference on Engineering Materials, ICEM 2012 - , Singapore
Süre: 30 Ara 201231 Ara 2012

Yayın serisi

AdıAdvanced Materials Research
Hacim651
ISSN (Basılı)1022-6680

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???event.eventtypes.event.conference???2012 International Conference on Engineering Materials, ICEM 2012
Ülke/BölgeSingapore
Periyot30/12/1231/12/12

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