Hot corrosion behavior of La2(Zr0.7Ce0.3)2O7based coatings prepared by plasma spraying and exposed to molten salts at 1050 °C in air

2016 ◽  
Vol 67 (11) ◽  
pp. 1195-1203 ◽  
Author(s):  
Z. S. Khan ◽  
B. Zou ◽  
X. Cao
Keyword(s):  
Plasma Spraying ◽  
Corrosion Behavior ◽  
Hot Corrosion ◽  
Molten Salts

scholarly journals Hot Corrosion Behavior of BaLa2Ti3O10 Thermal Barrier Ceramics in V2O5 and Na2SO4 + V2O5 Molten Salts

Coatings ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 351 ◽  
Author(s):  
Hui Liu ◽  
Jin Cai ◽  
Jihong Zhu
Keyword(s):  
Corrosion Behavior ◽  
Hot Corrosion ◽  
Molten Salts ◽  
Main Reaction ◽  
Thermal Barrier ◽  
Dense Layer ◽  
Reaction Products ◽  
Corrosion Medium ◽  
Barrier Coating ◽  
Salt Corrosion

BaLa2Ti3O10 ceramics for thermal barrier coating (TBC) applications were fabricated, and exposed to V2O5 and Na2SO4 + V2O5 molten salts at 900 °C to investigate the hot corrosion behavior. After 4 h corrosion tests, the main reaction products resulting from V2O5 salt corrosion were LaVO4, TiO2, and Ba3V4O13, whereas those due to Na2SO4 + V2O5 corrosion consisted of LaVO4, TiO2, BaSO4 and some Ba3V4O13. The structures of reaction layers on the surfaces depended on the corrosion medium. In V2O5 salt, the layer was dense and had a thickness of 8–10 μm. While in Na2SO4 + V2O5 salt, it had a ~15 μm porous structure and a dense, thin band at the bottom. Beneath the dense layer or the band, no obvious molten salt was found. The mechanisms by which the reaction layer forms were discussed.

Preparation of plasma sprayed nanostructured GdPO4 thermal barrier coating and its hot corrosion behavior in molten salts

2017 ◽  
Vol 43 (10) ◽  
pp. 7797-7803 ◽  
Author(s):  
Mingzhu Li ◽  
Yuxian Cheng ◽  
Lei Guo ◽  
Chenglong Zhang ◽  
Yuchen Zhang ◽  
...  
Keyword(s):  
Thermal Barrier Coating ◽  
Corrosion Behavior ◽  
Hot Corrosion ◽  
Molten Salts ◽  
Thermal Barrier ◽  
Barrier Coating ◽  
Plasma Sprayed

Hot corrosion behavior of NdYbZr2O7 exposed to V2O5 and Na2SO4 + V2O5 molten salts

2020 ◽  
Vol 46 (7) ◽  
pp. 8543-8552 ◽  
Author(s):  
Yang Wu ◽  
Zhiming Bai ◽  
Lei Zheng ◽  
Wenting He ◽  
Hongbo Guo
Keyword(s):  
Corrosion Behavior ◽  
Hot Corrosion ◽  
Molten Salts

Effects of Laser Remelting on Microstructural Characteristics and Hot Corrosion Behavior of MСrAlY Coating Prepared by Plasma Spraying

2019 ◽  
Vol 971 ◽  
pp. 70-76 ◽  
Author(s):  
Dong Sheng Wang
Keyword(s):  
Plasma Spraying ◽  
Corrosion Behavior ◽  
Hot Corrosion ◽  
Tial Alloy ◽  
Surface Oxidation ◽  
Corrosion Property ◽  
Laser Remelting ◽  
Mcraly Coating ◽  
Before And After ◽  
Plasma Sprayed

Plasma spraying technique was used to prepare MCrAlY coating on TiAl alloy surface, the coating was treated through the laser remelting process, and then scanning electron microscope (SEM) and X-ray diffractometer (XRD) were used to analyze surface topography and phase composition before and after hot corrosion behavior of the coating. Results indicate that after laser remelting treatment, lamellar structure of the coating disappears with improved compactness and most defects like pores and inclusion eliminated. Plasma sprayed MCrAlY coating can significantly improve hot corrosion property of TiAl alloy, which can be further improved after laser remelting. MCrAlY coating mainly experiences surface oxidation reaction and internal sulfurization reaction during the hot corrosion in the high-temperature molten salt, which mainly generate corrosion products such as Al2O3, Cr2O3, NiO, NiCr2O4, Ni3S2 and CrS.

scholarly journals Effect of scandia content on the hot corrosion behavior of Sc2O3 and Y2O3 co-doped ZrO2 in Na2SO4 + V2O5 molten salts at 1000 °C

2019 ◽  
Vol 158 ◽  
pp. 108094 ◽  
Author(s):  
Chao Chen ◽  
Tianquan Liang ◽  
Yan Guo ◽  
Xiyong Chen ◽  
Quanyan Man ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Hot Corrosion ◽  
Molten Salts ◽  
Co Doped
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