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Effect of Laser Fusing on Hot Corrosion Resistance of Nickel Based Self Fluxing Alloy Coating
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Effect of Laser Fusing on Hot Corrosion Resistance of Nickel Based Self Fluxing Alloy Coating

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Abstract:

The thermal sprayed coatings are widely used in waste incineration boilers and fossil fuel-fired boilers. However, the defects, such as porosity, cracks and unmelted particles, in these coatings are detrimental to corrosion performance. In this study, the nickel based self fluxing alloy coating was fused by YAG laser to improve hot corrosion resistance of the coating. Under appropriate laser parameters, the nonporous, crack-free coating was produced. Hot corrosion test, conducted in the presence of a mixed salt of Na2SO4/NaCl/KCl at 550Гshowed that the modified coating exhibited excellent corrosion resistance compared with the as sprayed and gas fused coatings.

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Periodical:

Materials Science Forum (Volumes 522-523)

Pages:

385-392

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.522-523.385

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Online since:

August 2006

Authors:

Yu Li, Kazumasa Nishio, Mitsuaki Katoh, Tomiko Yamaguchi, Shinji Okamine

Keywords:

Hot Corrosion, Laser Fusing, Ni-Cr-Si-B, Self-Fluxing Coating, Surface Roughness (SR)

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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