Microstructure and hot corrosion behavior of hot dip siliconized coating on Ni-base superalloy IN738LC

Abstract

Nickel-based superalloys are widely used at elevated temperature applications because of their high corrosion and oxidation resistance characteristics as well as high stability. To improve the hot corrosion resistance of Nickel-based superalloys, different coatings are applied. In this study, nickelbase superalloy Inconel 738LC was coated via a novel hot-dip diffusion siliconizing process and the corrosion behavior was investigated by XRD, SEM and EDS analyses. A sever degradation and poor hot corrosion resistance was detected by the uncoated sample, while the siliconized coated sample possessed high corrosion resistance. It was figured out that the high hot corrosion resistance of the coated sample was due to the formation of SiO 2 protective scale in the surface layer which protects the substrate elements in the hot corrosion environment.

Hydroxyapatite Consolidated by Zirconia: Applications for Dental Implant

“…Nowadays, many studies have focused on corrosion [52] and coating [53], especially importance of ceramic coatings as dental implant to enhance osseointegration. Different forms of ceramic coatings have been utilized on implants for dentistry over the last 15 years including inert ceramics such as zirconium and aluminum oxides and bioactive ceramics including bioglasses and calcium phosphates.…”

Investigation of aluminum oxide coatings created by electrolytic plasma method in different potential regimes

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Corrosion behavior of aluminum oxide coatings created by electrolytic plasma method under different potential regimes

“…Among the effective parameters, the type of applied electrical regime can affect the porosity and cracking networks of the coating as well as its chemical composition. Therefore, by selecting the appropriate electrical regime, and controlling the porosity, cracking and the type of formed phases in the coating, better mechanical properties and corrosion resistance can be provided for PEO coatings [12,[15][16][17].…”