scholarly journals Study on the Influence of Introducing Al Transition Layer on Deuterium Resistance of Al2O3 Coating

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Weijing Wang ◽  
Qinghe Yu ◽  
Xiaopeng Liu ◽  
Lei Hao ◽  
Jing Mi ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Transition Layer ◽  
Element Distribution ◽  
Al2o3 Coating ◽  
X Ray Diffraction ◽  
Depth Direction ◽  
Al2o3 Composite ◽  
316 L Stainless Steel ◽  
Microscopic Morphology ◽  
Polished Side

The Al/Al2O3 composite deuterium barrier was deposited on the polished side of 316 L stainless steel by the method of radio-frequency magnetron sputtering. The influence of the introduction of Al transition layer on the deuterium resistance performance of Al2O3 ceramic coating was studied. The field emission scanning electron microscope (SEM), the grazing incident X-ray diffraction technique (GIXRD), and the auger electron spectroscopy (AES) were used to analyze the microscopic morphology, phase, and element distribution in the depth direction of the Al/Al2O3 coating, and the gas-driver permeation method was used to measure the deuterium permeation behavior of the coating sample. The results show that Al2O3 is amorphous after annealing at 873 K. Due to the oxidation of the Al transition layer, the connection between the coating and the substrate is tightly connected. Under the combined action of permeation temperature and pressure of 873 K and 80 kPa, the deuterium permeability of Al/Al2O3 coating is 6.35 × 10 − 14  mol·m-1·s-1·Pa-0.5, which shows that the Al/Al2O3 coating has excellent deuterium permeation resistance. Furthermore, deuterium permeability of the Al/Al2O3 coating was diminished by about 2 orders of magnitude compared with 316 L stainless steel, and it is reduced 2~3 times compared with the single Al2O3 coating sample. The study indicates that the introduction of the Al transition layer can significantly enhance the barrier effect of the Al/Al2O3 coating sample.

scholarly journals Equivalent Properties of Transition Layer Based on Element Distribution in Laser Bending of 304 Stainless Steel/Q235 Carbon Steel Laminated Plate

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2326 ◽  
Author(s):  
Zihui Li ◽  
Xuyue Wang ◽  
Yonghao Luo
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Transition Layer ◽  
Volume Fraction ◽  
Element Distribution ◽  
304 Stainless Steel ◽  
Laminated Plate ◽  
Laser Bending ◽  
Bending Angle ◽  
Equivalent Method

Compared with the single-component metal plate, there is a special transition layer on the joint interface between two kinds of materials in the stainless steel-carbon steel laminated plate (SCLP). In order to describe the finite element model of laser bending accurately, it is of great significance to determine material properties of the transition layer. Based on the element distribution, an equivalent method is adopted to calculate thermal conductivity, thermal expansion coefficient, elastic modulus, density, Poisson’s ratio, and specific heat capacity of transition layer. The electron probe experiments show that the transition layer is formed by interfacial element diffusion with thickness of 7 μm. Besides, the volume fraction of stainless steel (46.63%) and carbon steel (53.37%) in the transition layer is tested by energy dispersive spectrometer, respectively. Through the equivalent method, a laser bending model of SCLP is simulated by ANSYS software to predict the bending angle under different parameters. The experimental verification shows that the maximum of bending angle errors is 3.74%, which is lower than the maximum 4.93% of errors calculated by the mean value method. The analysis verifies that the laser bending model is feasible and contributes to improving the accuracy of modeling SCLP in the laser bending process.

FORMATION OF CHROMIUM COATING AND COMPARATIVE EXAMINATION ON CORROSION RESISTANCE WITH 13CrSTEEL INCO2-SATURATED SIMULATED OILFIELD BRINE

2013 ◽  
Vol 20 (03n04) ◽  
pp. 1350041
Author(s):  
JIAOJUAN ZOU ◽  
FAQIN XIE ◽  
NAIMING LIN ◽  
XIAOFEI YAO ◽  
WEI TIAN ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Element Distribution ◽  
Chromium Coating ◽  
Tube Steel ◽  
X Ray Diffraction ◽  
Cross Sectional ◽  
P110 Steel ◽  
Comparative Examination ◽  
Oilfield Brine

In order to enhance the surface properties of P110 oil casing tube steel and increase its usage during operation, chromium coating was fabricated by pack cementation. Scanning electron microscope, energy dispersive spectrometry and X-ray diffraction were used to investigate the surface morphology, cross-sectional microstructure, element distribution and phase constitutions of the coating. Comparative examinations on corrosion resistance between chromium coating and 13 Cr stainless steel in CO2-saturated simulated oilfield brine were carried out via electrochemical measurements. The results showed that the obtained coating was uniform and compact, mainly consisted of CrxCyand doped with minor Cr2N . Chromizing treatment made it possible to create on the working surface of P110 steel with enhanced corrosion resistance, and the chromium coating indicated lower pitting corrosion sensitivity than that of 13 Cr stainless steel.

Oxidation Behavior at 1173 K of Modified P/M Stainless Steel 316 L by Addition of Cr, Ni, and Cr with Ni

2021 ◽  
Vol 63 (4) ◽  
pp. 317-321
Author(s):  
Yada Polsen ◽  
Panyawat Wangyao ◽  
Nutthita Chuankrerkkul ◽  
Patama Visuttipitukul ◽  
Ruangdaj Tongsri ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Oxidation Resistance ◽  
Xrd Analysis ◽  
Hydrogen Atmosphere ◽  
Hydraulic Press ◽  
Oxidation Products ◽  
X Ray Diffraction ◽  
316 L Stainless Steel ◽  
Ni Additions ◽  
Stainless Steel 316

Abstract Specimens of P/M 316 L stainless steel and modified P/M 316 L stainless steel with various amounts of Cr, Ni, and Cr along with Ni additions were compressed by a 500 MPa-hydraulic press for a duration of 30 s and then sintered at 1573 K in a hydrogen atmosphere for 2.7 ks. The oxidation resistance tests of those specimens were carried out at 1173 K in air for 360 ks. The 5 wt.-% Cr-added specimen resulted in the best oxidation resistance with the lowest oxidation rate constant of 1.54 × 10-7 kg2 × m-4 × s-1. The oxidation products which formed inside the pores and on the surfaces of all specimens were analyzed using scanning electron microscope/energy dispersive spectroscopic (SEM/EDS) and X-ray diffraction (XRD) analysis techniques. The results show that the oxides forming on both inside pores and surfaces were identified as Cr2O3, Fe2O3, (Fe0.6Cr0.4)2O3, NiFe2O4 and NiCr2O4 in all tested conditions. The measured hardness of the modified specimens was in the range of 87-92 HRB, compared to the hardness of the 316 L specimen, which was 93 HRB. Increasing the amount of powder added provided a slightly lower hardness value due to increased porosity.

scholarly journals Corrosion Resistant ZrO2 Sol-Gel Coating on Stainless Steel

1992 ◽  
Vol 271 ◽  
Author(s):  
M. Atik ◽  
M. A. Aegerter
Keyword(s):  
Stainless Steel ◽  
Sol Gel ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
Corrosion Resistant ◽  
Steel Sheets ◽  
Chemical Attack ◽  
316 L Stainless Steel ◽  
Zro2 Sol ◽  
Dip Coating Technique

ABSTRACTCorrosion resistant Sol-Gel ZrO2, coatings deposited by dip coating technique on 316 L stainless steel sheets have been fabricated utilizing sonocatalysed precursors sols prepared from zirconium alkoxide Zr(OC3H7)4, isopropanol, glacial acetic acid and water. Their composition varied between 0,025 to 0,9 mol/1 ZrO2. The coatings have been characterized by X-ray diffraction, IR optical reflection, ellipsometry and scanning electron microscopy. When densified under a slow heat treatment thin coatings exhibit outstanding corrosion resistance as no weight change has been observed after 24 h chemical attack in H2SO4 aqueous solution at 81°C and 10 h oxidation treatment in air at 800°C. Thick films as well as films densified under rapid heat treatments tend to crack and are less corrosion resistant.

Preparation of β-PbO2 and β-PbO2-MnO2 Coating on Stainless Steel Substrate

2012 ◽  
Vol 490-495 ◽  
pp. 3486-3490
Author(s):  
Qiang Yu ◽  
Zhen Chen ◽  
Zhong Cheng Guo
Keyword(s):  
Stainless Steel ◽  
Mass Fraction ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Substrate Material ◽  
X Ray Diffraction ◽  
X Ray ◽  
New Type ◽  
Plating Solution ◽  
Element Mass Fraction

In order to prepare a new type of anode material, stainless steel was selected as substrate material. The β-PbO2 coating on stainless steel substrate was prepared under the appropriate plating solution, and the PbO2-MnO2 coating was prepared with thermal decomposition. The crystal structure was determined by X-ray diffraction; Surface morphology was test by Scanning Electron Microscopy; the energy spectrum was used to determine element mass-fraction and the ratio of atomic number of the coatings.

Stacking Faults in a High Nitrogen Face-Centered-Cubic Phase Formed on Nitrogen-Modified Austenitic Stainless Steel

2008 ◽  
Vol 373-374 ◽  
pp. 318-321
Author(s):  
J. Liang ◽  
M.K. Lei
Keyword(s):  
Stainless Steel ◽  
Plasma Source ◽  
Peak Shift ◽  
Cubic Phase ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
High Nitrogen ◽  
X Ray ◽  
Peak Asymmetry ◽  
Face Centered

Effects of stacking faults in a high nitrogen face-centered-cubic phase (γΝ) formed on plasma source ion nitrided 1Cr18Ni9Ti (18-8 type) austenitic stainless steel on peak shift and peak asymmetry of x-ray diffraction were investigated based on Warren’s theory and Wagner’s method, respectively. The peak shift from peak position of the γΝ phase is ascribed to the deformation faults density α, while the peak asymmetry of the γΝ phase is characterized by deviation of the center of gravity of a peak from the peak maximum (Δ C.G.) due to the twin faults density β. The calculated peak positions of x-ray diffraction patterns are consistent with that measured for plasma source ion nitrided 1Cr18Ni9Ti stainless steel.

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