Corrosion Resistance of Cold-Sprayed Coatings
Author Information
Author(s): Scendo Mieczysław, Żórawski Wojciech
Primary Institution: Institute of Chemistry, Jan Kochanowski University in Kielce
Hypothesis
The study aims to determine the effect of heat treatment on the properties of cermet coatings on the Al7075 substrate.
Conclusion
Heat treatment at 300 °C significantly enhances the corrosion resistance of the cermet coating applied to the Al7075 substrate.
Supporting Evidence
- Heat treatment at 300 °C resulted in the most uniform and smooth structure for the cermet coating.
- Annealing introduced new phases, specifically Cr7C3 and Cr23C6, which formed on the cermet surface.
- The highest microhardness value was achieved for the coating annealed at 300 °C.
- The Cr3C2-25(Ni20Cr)/Al7075 coating heat treated at 300 °C exhibited the highest polarization resistance and lowest corrosion rate.
Takeaway
This study shows that heating a special coating can make it much better at resisting rust when it's exposed to harsh conditions.
Methodology
The coatings were produced using cold spray and subjected to heat treatment at various temperatures, followed by electrochemical testing in an acidic chloride solution.
Limitations
The study does not explore the long-term durability of the coatings under real-world conditions.
Digital Object Identifier (DOI)
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