Influence of laser-glazing on hot corrosion resistance of yttria-stabilized zirconia TBC in molten salt mixture of V2 O5 and Na2 SO4

2009 ◽  
Vol 60 (11) ◽  
pp. 882-888 ◽  
Author(s):  
X. Zhong ◽  
Y. Wang ◽  
Z. Xu ◽  
Y. Zhang ◽  
J. Zhang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Molten Salt ◽  
Hot Corrosion ◽  
Yttria Stabilized Zirconia ◽  
Laser Glazing ◽  
Stabilized Zirconia ◽  
Salt Mixture

Effects of laser surface remelting on the molten salt corrosion resistance of yttria-stabilized zirconia coatings

2018 ◽  
Vol 44 (18) ◽  
pp. 22645-22655 ◽  
Author(s):  
Peng Yi ◽  
Javad Mostaghimi ◽  
Larry Pershin ◽  
Pengyun Xu ◽  
Xianghua Zhan ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Molten Salt ◽  
Laser Surface ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Laser Surface Remelting ◽  
Salt Corrosion

scholarly journals Effects of Selective Laser Modification and Al Deposition on the Hot Corrosion Resistance of Ceria and Yttria-Stabilized Zirconia Thermal Barrier Coatings

Coatings ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 353 ◽  
Author(s):  
Panpan Zhang ◽  
Xiaofeng Zhang ◽  
Fuhai Li ◽  
Zhihui Zhang ◽  
Hong Li ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Hot Corrosion ◽  
Molten Salts ◽  
Yttria Stabilized Zirconia ◽  
Air Plasma ◽  
Laser Remelting ◽  
Stabilized Zirconia ◽  
Α Al2o3 ◽  
Sprayed Coating ◽  
Plasma Sprayed

The air-plasma-sprayed ceria and yttria-stabilized zirconia (CYSZ) coating was modified by selective laser remelting and Al deposition to enhance hot corrosion resistance. The dotted coating was obtained after selective laser remelting. Magnetron sputtering was used to deposit an Al film on the dotted coating, and a vacuum heat treatment was subsequently performed to produce a dense α-Al2O3 overlay. Hot corrosion behavior of the following three types of coatings was investigated: plasma-sprayed, dotted, and dotted coatings combined with Al deposition (DA). Hot corrosion behaviors were evaluated in a mixture of 55 wt % V2O5 and 45 wt % Na2SO4 molten salts at 1000 °C for 30 h. The hot corrosion reaction between molten salts and zirconia stabilizers (Y2O3 and CeO2) led to the generation of monoclinic zirconia, YVO4, and CeVO4 plate-shaped crystals, and the mineralization of CeO2. The results indicated that the hot corrosion resistance of the DA coating was the best, and the dotted coating had superior hot corrosion resistance in comparison with the plasma-sprayed coating. The minimal surface roughness and dense dotted units improved the hot corrosion resistance of the dotted coating. The dense α-Al2O3 overlay with chemical inertness effectively inhibited the infiltration of molten salts, which led to the optimal hot corrosion resistance of the DA coating.

Comparison of Hot Corrosion Resistance of YSZ and CYSZ Thermal Barrier Coatings in Presence of Sulfate-Vanadate Molten Salts

2012 ◽  
Vol 472-475 ◽  
pp. 141-144 ◽  
Author(s):  
Raheleh Ahmadi Pidani ◽  
Reza Shoja Razavi ◽  
Reza Mozafarinia ◽  
Hossein Jamali
Keyword(s):  
Corrosion Resistance ◽  
Hot Corrosion ◽  
Molten Salts ◽  
Yttria Stabilized Zirconia ◽  
Air Plasma ◽  
Stabilized Zirconia ◽  
X Ray ◽  
Strong Acidity ◽  
Analysis Of Results ◽  
Plasma Sprayed

In this study, NiCoCrAlY bond coat and two types of top coat including yttria stabilized zirconia (YSZ) and ceria and yttria stabilized zirconia (CYSZ) were deposited on IN 738LC by air plasma spraying (APS). Hot corrosion behavior of samples in 1000 °C was study using 55wt.%V2O5-45wt.%Na2SO4 corrosive salt. Characterization and analysis of results was done by employing field emission scanning electron microscope (FESEM) and x-ray diffractometry (XRD). Results ravealed that plasma sprayed CYSZ TBCs exhibited excellent hot corrosion resistance which was superior to that of YSZ TBCs due to strong acidity and high contents of stabilizer.

Sulfate‐vanadate hot corrosion of neodymium cerate/yttria stabilized zirconia composite coating

2018 ◽  
Vol 16 (3) ◽  
pp. 931-942
Author(s):  
Noveed Ejaz ◽  
Liaqat Ali ◽  
Akhlaque Ahmed ◽  
Asif Rafiq ◽  
Gul Hameed Awan ◽  
...  
Keyword(s):  
Composite Coating ◽  
Hot Corrosion ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia

scholarly journals Study of Molten Salt Corrosion of Superni-75 using Termogravimetric Technique

1970 ◽  
Vol 3 (2) ◽  
pp. 77-82 ◽  
Author(s):  
TS Sidhu ◽  
S Prakash ◽  
RD Agrawal
Keyword(s):  
Corrosion Resistance ◽  
Molten Salt ◽  
Hot Corrosion ◽  
Corrosion Behaviour ◽  
Thick Layer ◽  
X Ray Diffraction ◽  
Salt Corrosion ◽  
Marine Engineering ◽  
The Given ◽  
Kinetics Of

The present study aims to evaluate the hot corrosion behaviour of the Ni-based alloy Superni- 75 in the molten salt environment of Na2SO-60%V2O5 at 900°C under cyclic conditions. The thermogravimetric technique was used to establish the kinetics of corrosion. X-ray diffraction, scanning electron microscopy/energy-dispersive analysis and electron probe microanalysis techniques were used to analyse the corrosion products. Superni-75 has successfully provided the hot corrosion resistance to the given molten salt environment. The hot corrosion resistance of the Superni-75 has been attributed to the formation of uniform, homogeneous and adherent thick layer of the scale consisting mainly of oxides of nickel and chromium, and refractory Ni(VO3)2. These oxides and refractory nickel vanadates have blocked the penetration of oxygen and other corrosive species to the substrate. Keywords: Hot corrosion, nickel-based alloy, superalloy, molten salt environment   DOI: 10.3329/jname.v3i2.922 Journal of Naval Architecture and Marine Engineering 3(2006) 77-82

scholarly journals Dynamic pilot plant facility for applications in CSP: Evaluation of corrosion resistance of A516 in a nitrate molten salt mixture

2017 ◽  
Author(s):  
Francisco Javier Pérez ◽  
Víctor Encinas-Sánchez ◽  
Gustavo García-Martín ◽  
María Isabel Lasanta ◽  
María Teresa de Miguel
Keyword(s):  
Corrosion Resistance ◽  
Molten Salt ◽  
Pilot Plant ◽  
Salt Mixture
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