Effect of chromium and silicon additions on the hot corrosion resistance of nickel aluminide coatings

被引：1
|
作者：
Gregoire, Benjamin [1 ,2 ]
Montero, Xabier [2 ]
Galetz, Mathias C. [2 ]
Bonnet, Gilles [1 ]
Pedraza, Fernando [1 ]
机构：
[1] La Rochelle Univ, Lab Sci Ingn Environm LaSIE, UMR CNRS 7356, Ave Michel Crepeau, F-17042 La Rochelle 1, France
[2] DECHEMA Forschungsinst, Theodor Heuss Allee 25, D-60486 Frankfurt, Germany
来源：
CORROSION SCIENCE | 2023年 / 224卷
关键词：
A; Aluminium; A. Molten salts; C; Oxidation; Sulphidation; C. Type II hot corrosion; C. Fluxing mechanisms; SI PHASE-DIAGRAM; OXIDATION BEHAVIOR; PART II; NI; AL; CR; MECHANISMS; PURE; DEGRADATION; EQUILIBRIA;
D O I：
10.1016/j.corsci.2023.111517
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of chromium and silicon modification on the microstructure and hot corrosion resistance of slurry aluminide coatings applied on pure nickel was studied by in-depth microscopic analyses. The simple and the Cr-modified aluminide coatings provided limited protection in Type II hot corrosion conditions but the Si-modified coating exhibited outstanding resistance with no sign of attack after 300 h of isothermal exposure at 700 degrees C. The synergistic dissolution between NiO and Al2O3/Cr2O3 appears responsible for the onset of the corrosion attack for the simple and Cr-modified coatings while silicon is shown to extend the incubation period.
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页数：18
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