Effect of Cr Content on Corrosion Resistance of Ni–xCr–Mo Laser-Cladding Coatings under H 2 S-Induced High-Temperature Corrosion Atmosphere.
In: Materials (1996-1944), Jg. 15 (2022-03-01), Heft 5, S. 1885-1885
Online
academicJournal
Zugriff:
Ni–xCr–Mo laser-cladding coatings with varying Cr content of 10, 15, 20, 25, and 30 wt.% were fabricated using a self-assembled coaxial laser-cladding device. The H2S-induced high-temperature corrosion tests under reductive atmosphere were conducted at 500, 550, and 600 °C. Subsequently, the influence of Cr content on the microstructural evolution and corrosion resistance of the Ni–xCr–Mo coatings was investigated. The experimental results revealed that 30 wt.% Cr is the limited maximum content that forms the suitable morphology of coatings without large prominent pores and cracks during the fabrication process, and 15 wt.% Cr corresponds to the critical minimum content for excellent corrosion resistance, as implied from the variation tendency of the corrosion weight-gain curves. Moreover, a two-layer structure of the corrosion scales was observed in the Ni–xCr–Mo laser-cladding coatings, which was primarily caused by the selective corrosion between the Ni and S and Cr/Mo and O. [ABSTRACT FROM AUTHOR]
Titel: |
Effect of Cr Content on Corrosion Resistance of Ni–xCr–Mo Laser-Cladding Coatings under H 2 S-Induced High-Temperature Corrosion Atmosphere.
|
---|---|
Autor/in / Beteiligte Person: | Liu, Congcong ; Liu, Zongde ; Gao, Yuan ; Wang, Xinyu ; Zheng, Chao |
Link: | |
Zeitschrift: | Materials (1996-1944), Jg. 15 (2022-03-01), Heft 5, S. 1885-1885 |
Veröffentlichung: | 2022 |
Medientyp: | academicJournal |
ISSN: | 1996-1944 (print) |
DOI: | 10.3390/ma15051885 |
Schlagwort: |
|
Sonstiges: |
|