scholarly journals Suppression of molten salt corrosion by plasma sprayed Ni3Al coatings

2021 ◽  
Author(s):  
Sarah Yasir ◽  
Jose Luis Endrino ◽  
Elena Guillén ◽  
Adrianus Indrat Aria
Keyword(s):  
Stainless Steel ◽  
Corrosion Rate ◽  
Corrosion Behaviour ◽  
Stainless Steel Surface ◽  
Air Plasma ◽  
Oxide Layers ◽  
Salt Corrosion ◽  
Plasma Sprayed ◽  
Steel Substrates ◽  
Al Coating

AbstractCorrosion behaviour of stainless steel 347 was investigated in a molten nitrate salt (60 wt% NaNO3 + 40 wt% KNO3) immersion at 565 °C for up to 3000 h. A growth of stratified oxide layers consisting of NaFeO2, Fe2O3 and Fe3O4 was observed on the stainless steel surface with a constant gravimetric corrosion rate of ~ 0.4 µm/year. The feasibility of using Ni3Al coatings deposited by means of air plasma spray for suppression of corrosion was investigated. Ni3Al coatings were observed to undergo a fast oxidation with a corrosion rate of ~ 2.7 µm/year in the first 500 h, and subsequently stabilise between 500 and 3000 h with no observable changes in microstructure, composition and weight at a corrosion rate of ~ 0.02 µm/year. The results presented in this study strongly suggest that Ni3Al coating suppresses the formation of oxide layers on the surface of stainless steel substrates and can be used as protection against corrosion in the presence of molten nitrate salts, which is of relevance to thermal energy storage applications.

Low Friction Stainless Steel Coatings Graphite Doped Elaborated by Air Plasma Sprayed

2004 ◽  
Vol 13 (5) ◽  
pp. 557-563
Author(s):  
A. Harir ◽  
H. Ageorges ◽  
A. Grimaud ◽  
P. Fauchais ◽  
F. Platon
Keyword(s):  
Stainless Steel ◽  
Air Plasma ◽  
Low Friction ◽  
Plasma Sprayed ◽  
Stainless Steel Coatings

Study of the microstructure of NiCr splats plasma sprayed on to stainless steel substrates by TEM

2010 ◽  
Vol 204 (9-10) ◽  
pp. 1608-1615 ◽  
Author(s):  
S. Brossard ◽  
P.R. Munroe ◽  
A.T.T. Tran ◽  
M.M. Hyland
Keyword(s):  
Stainless Steel ◽  
Plasma Sprayed ◽  
Steel Substrates

Effect of Time Depositions on Electrodeposited Cobalt-Iron Nanocoating

2012 ◽  
Vol 576 ◽  
pp. 565-568 ◽  
Author(s):  
Wan Normimi Roslini Abdullah ◽  
Koay Mei Hyie ◽  
Nor Azrina Resali ◽  
Chong Wen Tong
Keyword(s):  
Stainless Steel ◽  
Corrosion Rate ◽  
Surface Morphology ◽  
Elemental Composition ◽  
Stainless Steel Substrate ◽  
Corrosion Behaviour ◽  
Steel Substrate ◽  
Crystallographic Structure ◽  
Grain Sizes ◽  
Cobalt Iron

Cobalt-Iron (CoFe) nanocrystalline coatings are successfully prepared in 30, 60 and 90 minutes time depositions using electrodeposition method. The effect of time deposition towards crystallographic structure, elemental composition, surface morphology, microhardness and corrosion behaviour of CoFe coatings were investigated. The CoFe nanocrystalline coatings were deposited on stainless steel substrate at pH 3 environment. The grain sizes of the coatings are in the range of 57.88 to 70.18 nm. The CoFe nanocrystalline coating prepared at 90 minutes deposition achieves the highest microhardness of 290 HV. This coating also exhibits the lowest corrosion rate with 1.086 mpy. It is found that the increment of time deposition improves the microhardness and corrosion behavior of CoFe nanocrystalline coatings.

Experiments and simulation of rapid solidification of air plasma sprayed alloy 625 on stainless steel

2010 ◽  
Vol 204 (9-10) ◽  
pp. 1521-1527 ◽  
Author(s):  
H. Liu ◽  
F. Azarmi ◽  
M. Bussmann ◽  
J. Mostaghimi ◽  
T.W. Coyle
Keyword(s):  
Stainless Steel ◽  
Rapid Solidification ◽  
Air Plasma ◽  
Alloy 625 ◽  
Plasma Sprayed

AES of thin oxide layers on a duplex stainless steel surface

2010 ◽  
Vol 42 (6-7) ◽  
pp. 762-765 ◽  
Author(s):  
Djordje Mandrino ◽  
Črtomir Donik ◽  
Monika Jenko
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Steel Surface ◽  
Stainless Steel Surface ◽  
Oxide Layers ◽  
Thin Oxide

scholarly journals Characterization of Sol-Gel Derived Calcium Hydroxyapatite Coatings Fabricated on Patterned Rough Stainless Steel Surface

Coatings ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 334 ◽  
Author(s):  
Vilma Jonauske ◽  
Sandra Stanionyte ◽  
Shih-Wen Chen ◽  
Aleksej Zarkov ◽  
Remigijus Juskenas ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Sol Gel ◽  
Calcium Hydroxyapatite ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Stainless Steel Surface ◽  
Angle Measurements ◽  
Hydroxyapatite Coatings ◽  
Diffuse Reflectance Infrared ◽  
Steel Substrates

Sol-gel derived calcium hydroxyapatite (Ca10(PO4)6(OH)2; CHA) thin films were deposited on stainless steel substrates with transverse and longitudinal patterned roughness employing a spin-coating technique. Each layer in the preparation of CHA multilayers was separately annealed at 850 °C in air. Fabricated CHA coatings were placed in simulated body fluid (SBF) for 2, 3, and 4 weeks and investigated after withdrawal. For the evaluation of obtained and treated with SBF coatings, diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), X-ray diffraction (XRD) analysis, Raman spectroscopy, XPS spectroscopy, scanning electron microscopy (SEM) analysis, and contact angle measurements were used. The tribological properties of the CHA coatings were also investigated in this study.

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