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Corrosion and sliding wear behavior of Cr3Cr2-NiCr coatings alloyed by electron beam treatment

V. A. ŞERBAN1, D. UŢU1,* , G. MĂRGINEAN2

Affiliation

  1. University “Politehnica” Timisoara, Mechanical Engineering Faculty, Timisoara, Romania
  2. University of Applied Sciences Gelsenkirchen, Germania

Abstract

Cr3Cr2-NiCr cermet coatings were deposited by high velocity oxygen fuel (HVOF) spraying technique, onto the surface of Ni-based superalloy namely INCONEL 617 and subsequently remelted using the electron beam (EB) technique. The corrosion and sliding wear behaviour of the coatings was investigated before and after EB remelting. The scanning electron microscopy SEM and X-ray diffraction were used to characterize the coating morphology and to determine the phase modifications appeared during the alloying process. The electrochemical corrosion tests were conducted in a 0.5M H2SO4 solution on uncoated as well as on HVOF sprayed and EB remelted coated superalloy. The wear behaviour of the coating before and after remelting was evaluated using the pin-on-disk method. The achieved results demonstrated that a certain alloying degree of the investigated cermet coatings leads to the improvement of the corrosion behavior..

Keywords

Cr3Cr2-NiCr cermet coating, Sliding wear behaviour, EB alloying.

Citation

V. A. ŞERBAN, D. UŢU, G. MĂRGINEAN, Corrosion and sliding wear behavior of Cr3Cr2-NiCr coatings alloyed by electron beam treatment, Optoelectronics and Advanced Materials - Rapid Communications, 8, 1-2, January-February 2014, pp.153-157 (2014).

Submitted at: July 15, 2013

Accepted at: Jan. 22, 2014