Hot corrosion behavior of CoWSi/WSi2 coating exposed to Na2SO4+NaCl salt at 900 °C
Source abstract
Abstract
Abstract In this study, the high temperature hot corrosion behavior of a CoWSi/WSi 2 composite coating was investigated. Hot corrosion studies were performed on CoWSi/WSi 2 coated nickel specimens after exposure to a molten Na 2 SO 4 +NaCl salt environment at 900 °C under cyclic conditions. Thermogravimetric technique was used to establish the kinetics of corrosion. XRD and SEM/EDS techniques were used to analyze the corrosion products. The oxide scale formed on the coating surface was complex and the hot corrosion resistance of coating may be attributed to the formation of oxides and spinels of silicon, cobalt and tungsten. Also, NaCl accelerated the degeneration of the coating because of producing the volatile CoCl 2 and thereby oxygen and sulfur could easily penetrate into the coatings and caused the formation of internal oxide and sulfide.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Intermetallics and Advanced Alloy Properties · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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