High-Temperature Corrosion of HVAF-Sprayed Ni-Based Coatings for Boiler Applications

• DOI: 10.1007/s11085-019-09906-0
• Publication Date: 2019-03-14T11:56:05Z
• Authors: J. Eklund; J. Phother; E. Sadeghi; S. Joshi; J. Liske
• Keywords: High-Temperature Corrosion; Nichrome

The present study investigates the initial corrosion behaviour of HVAF-sprayed NiCr, NiAl and NiCrAlY coatings in two different environments, O2 + H2O KCl at 600 °C for up to 168 h order evaluate possibility utilizing such biomass- waste-fired boilers. SEM/EDX analysis showed that all displayed a protective H2O. Upon addition (O2 KCl), NiCr coating drastically changed as it formed thick oxide layer major chlorine diffusion down substrate. significantly better resistance with only minor formation. exhibited similar when exposed absence indicating thin has on surface. performance is promising future studies long-term exposures more corrosive environments boiler.