Corrosion behavior of Fe-Si metallic coatings added with NiCrAlY in an environment of fuel oil ashes at 700°C
✍ Scribed by V. M. Salinas-Bravo; J. Porcayo-Calderón; T. Romero-Castañon; G. Domínguez-Patiño; J. G. Gonzalez-Rodriguez
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- German
- Weight
- 324 KB
- Volume
- 56
- Category
- Article
- ISSN
- 0947-5117
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✦ Synopsis
Electrochemical potentiodynamic polarization curves and immersion tests for 300 h at 700 8C in a furnace have been used to evaluate the corrosion resistance of Fe-Si metallic coatings added with up to 50 wt.% of NiCrAIY. The corrosive environment was fuel oil ashes from a steam generator. The composition of fuel oil ashes includes high content of vanadium, sodium and sulfur.
The results obtained show that only the addition of 20 wt.% NiCrAlY to the Fe-Si coating improves its corrosion resistance. The behavior of all tested coatings is explained by the results obtained from the analysis of every coating using electron microscopy and energy dispersive X-ray analysis.