期刊
SURFACE & COATINGS TECHNOLOGY
卷 371, 期 -, 页码 20-35出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2019.01.080
关键词
Chlorine-induced high-temperature corrosion; Erosion-corrosion protection; Thermal spraying; Amorphous coating; HVAF; HVOF
资金
- Knowledge Foundation for the SCoPe project [RUN 20160201]
- Vastra Gotalandsregionen (VGR) [RUN 2016-01489]
Chlorine-induced high-temperature corrosion and erosion-corrosion behavior of amorphous Fe-based coatings sprayed by high velocity air-fuel (HVAF) and high velocity oxy-fuel (HVOF) techniques were investigated. The coated specimens were first exposed to isothermal high-temperature corrosion at 600 degrees C in ambient air with and without KC1. The exposed specimens were then subjected to alumina erodent. The as-sprayed HVAF coating showed a more compact and uniform microstructure with a higher hardness leading to higher corrosion and erosion-corrosion resistance. After erosion, all the coatings similarly exhibited a combined brittle/ductile damage to surface oxide scale that previously formed in the corrosive environment. The corrosion and erosion corrosion behavior of the coatings primarily relied on the uniformity of coatings' microstructure and distribution of alloying elements to form the protective oxide scale in the corrosive environment, which can resist against erodent in the erosive media.
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