ELECTROCHEMICAL CARBONITRIDING OF 316L STAINLESS STEEL IN MOLTEN SALT SYSTEM

2018 ◽  
Vol 25 (03) ◽  
pp. 1850072
Author(s):  
YANJIE REN ◽  
BO XIAO ◽  
YAQING CHEN ◽  
JIAN CHEN ◽  
JIANLIN CHEN
Keyword(s):  
Stainless Steel ◽  
Molten Salts ◽  
316L Stainless Steel ◽  
Electrode System ◽  
Chromium Nitride ◽  
X Ray Diffraction ◽  
Compact Layer ◽  
X Ray ◽  
Carbon Sheet ◽  
Molten Salt System

This paper reports an electrochemical route for carbonitriding 316L stainless steel in molten salts. Carbonitriding process was accomplished in molten alkaline chloride (LiCl/KCl) with the addition of KNO2 at 480[Formula: see text]C using a three-electrode system in which a carbon sheet was the counter electrode. The carbonitriding layer of 316L stainless steel obtained by potentiostatic electrolysis was analyzed by several physical techniques. The results showed that a compact layer with a thickness of about 7[Formula: see text][Formula: see text]m formed after the treatment. According to X-ray diffraction analysis, chromium nitride and carbide formed on the surface of carbonitriding layer. The microhardness of the carbonitriding layer is HV 336, as compared to HV 265 for the substrate.

Electrodeposition of Aluminum on 316L Stainless Steel from Molten Salts Based on Chlorides

2008 ◽  
Vol 373-374 ◽  
pp. 273-276 ◽  
Author(s):  
Yu Jiang Wang ◽  
Xin Xin Ma ◽  
Guang Wei Guo
Keyword(s):  
Stainless Steel ◽  
Cross Section ◽  
Molten Salts ◽  
Single Phase ◽  
316L Stainless Steel ◽  
Aluminum Layer ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Purity Aluminum ◽  
Scanning Electron

The electrodeposition of aluminum on 316L stainless steel from a molten salts based on chloride has been studied. The surface morphology of the aluminum layer has been examined through scanning electron microscope (SEM) and the structure of the aluminum layer has been analyzed by X-ray diffraction (XRD). The thickness of the deposited aluminum layer has been measured by the method of cross-section scan. It has been suggested that a white, smooth, non-porous and a high purity aluminum layer can be obtained on 316L stainless steel from the ternary chloride molten salts (AlCl3 – NaCl - KCl). And the structure of the aluminum layer was single-phase.

scholarly journals Effect of Rare Earth Oxides on Microstructure and Corrosion Behavior of Laser-Cladding Coating on 316L Stainless Steel

Coatings ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 636 ◽  
Author(s):  
Xu ◽  
Wang ◽  
Chen ◽  
Qiao ◽  
Zhang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Rare Earth ◽  
Corrosion Behavior ◽  
Laser Cladding ◽  
316L Stainless Steel ◽  
Electrochemical Impedance ◽  
Salt Spray ◽  
Rare Earth Oxides ◽  
X Ray Diffraction ◽  
X Ray

The effect of rare earth oxides on the microstructure and corrosion behavior of laser-cladding coating on 316L stainless steel was investigated using hardness measurements, a polarization curve, electrochemical impedance spectroscopy (EIS), a salt spray test, X-ray diffraction, optical microscopy, and scanning electron microscopy (SEM). The results showed that the modification of rare earth oxides on the laser-cladding layer caused minor changes to its composition but refined the grains, leading to an increase in hardness. Electrochemical and salt spray studies indicated that the corrosion resistance of the 316L stainless steel could be improved by laser cladding, especially when rare earth oxides (i.e., CeO2 and La2O3) were added as a modifier.

Electrodepositing Ir Film at Constant Current in NaCl-KCl Molten Salts

2013 ◽  
Vol 652-654 ◽  
pp. 1834-1837
Author(s):  
Jian Gang Qian ◽  
Hai Ting Li ◽  
Peng Rui Li ◽  
Tian Zhao
Keyword(s):  
Molten Salt ◽  
Molten Salts ◽  
Film Surface ◽  
Constant Current ◽  
Process Conditions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Energy Dispersive Spectroscope ◽  
Molten Salt System ◽  
Deposition Current Density

In this study, the dense and well-integrated Ir films were electrodeposited on Pt substrate at a constant current process in the NaCl-KCl molten salt system containing IrCl3. The morphology and constitution of the Ir films at different process conditions were examined by scanning electron microscope (SEM), energy dispersive spectroscope (EDS) and X-ray diffraction (XRD) respectively. The results showed that IrCl3 concentration had significantly influenced the surface morphology of the Ir film. The particles of the deposition film surface became lager with increasing the fraction of IrCl3 and gradually decreased with increasing the temperature. However, the film quality decreased due to the formation of some tiny holes when further increasing the temperature. The particle size decreased gradually with the increase of deposition current density. The addition of CsCl could not only reduce the molten salt temperature but also increase the deposition rate of Ir.

Quantitative Evaluation of Strain Induced Martensite in STS 316L Stainless Steel

2006 ◽  
Vol 326-328 ◽  
pp. 677-680 ◽  
Author(s):  
C.S. Kim ◽  
Il Ho Kim ◽  
Ik Keun Park ◽  
C.Y. Hyun
Keyword(s):  
Stainless Steel ◽  
Diffraction Analysis ◽  
316L Stainless Steel ◽  
Tensile Deformation ◽  
Martensite Phase ◽  
Microstructural Development ◽  
X Ray Diffraction ◽  
X Ray ◽  
Strain Induced Martensite ◽  
Ae Counts

In the present work, the strain induced martensite in 316L stainless steel was quantitatively characterized by X-ray diffraction, the measurement of the magnetic coercivity and the AE technique during the monotonic tensile deformation of plate specimens. Plate specimens subjected to different heat treatments (i.e. having different initial microstructures) were tensile-deformed and the AE counts obtained during tensile deformation were correlated with the microstructural development. The AE count was observed to increase with increasing amount of strain induced martensite phase, as determined by X-ray diffraction analysis. The potential of the AE technique and the measurement of the magnetic coercivity to be used for the evaluation of the tensile deformation was discussed in relation to the existence of strain-induced martensite.

Estimative of the Stacking Fault Energy for a FeNi(50/50) Alloy and a 316L Stainless Steel

2008 ◽  
Vol 591-593 ◽  
pp. 3-7 ◽  
Author(s):  
Marcos Flavio de Campos ◽  
S.A. Loureiro ◽  
Daniel Rodrigues ◽  
Maria do Carmo Silva ◽  
Nelson Batista de Lima
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Milling Time ◽  
High Energy ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
X Ray Diffraction ◽  
Experimental Conditions ◽  
X Ray ◽  
High Energy Milling

The effect of high energy milling on powders of a FeNi (50/50) alloy and a 316L stainless steel has been evaluated by means of X-Ray Diffraction (XRD). The average microstrain as function of the milling time (1/2h, 1h and 8h) was determined from XRD data. The displacement and broadening of the (XRD) peaks were used for estimate the stacking fault energy (SFE), using the method of Reed and Schramm. It was estimated SFE=79 mJ/m2 for the FeNi (50/50) alloy and SFE=14 mJ/m2 for the 316L stainless steel. The better experimental conditions for determining the SFE by XRD are discussed.

Study of Y2O3/Er2O3 Multilayered Coatings Deposited by Magnetron Sputtering

2011 ◽  
Vol 686 ◽  
pp. 641-645
Author(s):  
Jun Liu ◽  
Wei Ling Lv ◽  
Tao Tang ◽  
Si Xiang Zhao ◽  
Rong Lei ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Magnetron Sputtering ◽  
Bonding Strength ◽  
316L Stainless Steel ◽  
Bipolar Pulse ◽  
X Ray Diffraction ◽  
X Ray ◽  
Multilayered Coatings ◽  
Layered Coatings ◽  
Steel Substrates

The yttria-erbia multilayered coatings were prepared on 316L stainless steel substrates by bipolar pulse magnetron sputtering. Structures of these coatings were examined by X-ray diffraction and scanning electron microscopy. Bonding strength of these coatings on 316L stainless steel substrates was measured by scratch tester. Nano-hardness of these coatings was measured by nano-indenter. Comparative studies of the mechanical properties of the single-layered yttria coatings and multilayered coatings were conducted, and the seven layered coatings presented the highest bonding strength and nano-hardness as well as elastic modulus.

Effect of Temperature on BCP Ceramics Coating on 316L Stainless Steel Using Electrophoretic Technique

2012 ◽  
Vol 501 ◽  
pp. 66-70 ◽  
Author(s):  
Asam M.A. Abudalazez ◽  
Shah Rizal Kasim ◽  
Azlan B. Ariffin ◽  
Zainal Arifin Ahmad
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Morphological Changes ◽  
Steel Substrate ◽  
Effect Of Temperature ◽  
Vacuum Furnace ◽  
X Ray Diffraction ◽  
X Ray ◽  
Deposition Voltage ◽  
Temperature Crack

Biphasic calcium phosphate (BCP) coatings on a medical grade 316L stainless steel substrate were prepared by electrophoretic deposition (EPD) using ethanol as a dispersive medium. The deposition voltage of 30V was applied for 1 min at 25, 40 and 60 °C, respectively. The coated substrates were sintered in a vacuum furnace at 800 °C for 1 h. The surface morphology, structure and phase composition of the coatings was investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results showed that by increasing deposition conditions of voltage and temperature, crack occurrence and morphological changes increased in the produced coatings. The optimum condition for crack-free surface was at 30 V at 25 °C.

A Comparative Study of Biomimetic Coatings on Titanium and Stainless Steel

2014 ◽  
Vol 802 ◽  
pp. 440-445 ◽  
Author(s):  
Mariny F.C. Coelho ◽  
Maria E.R. Cronemberger ◽  
Juliete N. Pereira ◽  
Sandra Nakamatsu ◽  
Sylma Carvalho Maestrelli ◽  
...  
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Orthopedic Implants ◽  
Human Blood Plasma ◽  
X Ray Diffraction ◽  
X Ray ◽  
Good Corrosion Resistance ◽  
Synthetic Solution ◽  
Biomimetic Method ◽  
Cp Ti

Titanium and stainless steel are examples of biomaterials widely used in dental and orthopedic implants owing to their properties of good corrosion resistance and excellent biocompatibility. This paper reports on a study of the biomimetic method applied to titanium (cp-Ti) and 316L stainless steel. The method consists in immersing the metal substrate in a synthetic solution of SBF (simulated body fluid) whose composition, pH and temperature resemble those of human blood plasma. The coating on the two metals was effective for obtaining hydroxyapatite, which was confirmed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR).

Sign in / Sign up

Export Citation Format

Share Document