Monochromatized x-ray photoelectron spectroscopy of the AM60 magnesium alloy surface after treatments in fluoride-based Ti and Zr solutions

2005 ◽  
Vol 37 (5) ◽  
pp. 509-516 ◽  
Author(s):  
S. Verdier ◽  
S. Delalande ◽  
N. van der Laak ◽  
J. Metson ◽  
F. Dalard
Keyword(s):  
Magnesium Alloy ◽  
Photoelectron Spectroscopy ◽  
Alloy Surface ◽  
X Ray

Utilisation of High-Energy Heat Sources in Magnesium Alloy Surface Layer Treatment

2013 ◽  
Vol 58 (2) ◽  
pp. 619-624 ◽  
Author(s):  
M. Szafarska ◽  
J. Iwaszko ◽  
K. Kudła ◽  
I. Łegowik
Keyword(s):  
Surface Layer ◽  
Magnesium Alloy ◽  
Physicochemical Properties ◽  
Treatment Effectiveness ◽  
High Energy ◽  
Alloy Surface ◽  
Heat Sources ◽  
X Ray ◽  
Additional Equipment ◽  
Alloy Surface Layer

The main aim of the study was the evaluation of magnesium alloy surface treatment effectiveness using high-energy heat sources, i.e. a Yb-YAG Disk Laser and the GTAW method. The AZ91 and AM60 commercial magnesium alloys were subject to surface layer modification. Because of the physicochemical properties of the materials studied in case of the GTAW method, it was necessary to provide the welding stand with additional equipment. A novel two-torch set with torches operating in tandem was developed within the experiment. The effectiveness of specimen remelting using a laser and the GTAW method was verified based on macro- and microscopic examinations as well as in X-ray phase analysis and hardness measurements. In addition, the remelting parameters were optimised. The proposed treatment methodology enabled the achieving of the intended result and effective modification of a magnesium alloy surface layer.

Crystallization on CuZr Amorphous Alloy Surface. An X-Ray Photoelectron Spectroscopy Study

1990 ◽  
Vol 122 (2) ◽  
pp. 481-487 ◽  
Author(s):  
H. Lu ◽  
C. L. Bao ◽  
X. N. Yu ◽  
Q. K. Xue ◽  
D. S. Tang ◽  
...  
Keyword(s):  
Amorphous Alloy ◽  
Photoelectron Spectroscopy ◽  
Alloy Surface ◽  
Spectroscopy Study ◽  
X Ray

NANOMECHANICAL AND CORROSION PROPERTIES OF ZK60 MAGNESIUM ALLOY IMPROVED BY GD ION IMPLANTATION

2014 ◽  
Vol 21 (06) ◽  
pp. 1450085 ◽  
Author(s):  
XUE WEI TAO ◽  
ZHANG ZHONG WANG ◽  
XIAO BO ZHANG ◽  
ZHI XIN BA ◽  
YA MEI WANG
Keyword(s):  
Magnesium Alloy ◽  
Ion Implantation ◽  
Photoelectron Spectroscopy ◽  
Surface Hardness ◽  
Protective Layer ◽  
Hybrid Structure ◽  
Nacl Solution ◽  
Corrosion Properties ◽  
X Ray ◽  
Zk60 Magnesium Alloy

Gadolinium ( Gd ) ion implantation with doses from 2.5 × 1016 to 1 × 1017 ions/cm2 into ZK60 magnesium alloy was carried out to improve its surface properties. X-ray photoelectron spectroscopy (XPS), nanoindenter, electrochemical workstation and scanning electron microscope (SEM) were applied to analyze the chemical composition, nanomechanical properties and corrosion characteristics of the implanted layer. The results indicate that Gd ion implantation produces a hybrid-structure protective layer composed of MgO , Gd 2 O 3 and metallic Gd in ZK60 magnesium alloy. The surface hardness and modulus of the Gd implanted magnesium alloy are improved by about 300% and 100%, respectively with the dose of 1 × 1017 ions/cm2, while the slowest corrosion rate of the magnesium alloy in 3.5 wt.% NaCl solution is obtained with the dose of 5 × 1016 ions/cm2.

scholarly journals Corrosion Resistance of MgZn Alloy Covered by Chitosan-Based Coatings

2021 ◽  
Vol 22 (15) ◽  
pp. 8301
Author(s):  
Iryna Kozina ◽  
Halina Krawiec ◽  
Maria Starowicz ◽  
Magdalena Kawalec
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Corrosion Rate ◽  
Photoelectron Spectroscopy ◽  
Multilayer Coating ◽  
Sem Analysis ◽  
Linear Sweep ◽  
High Corrosion Resistance ◽  
X Ray ◽  
Hank’S Solution

Chitosan coatings are deposited on the surface of Mg20Zn magnesium alloy by means of the spin coating technique. Their structure was investigated using Fourier Transform Infrared Spectroscopy (FTIR) an X-ray photoelectron spectroscopy (XPS). The surface morphology of the magnesium alloy substrate and chitosan coatings was determined using Scanning Electron Microscope (FE-SEM) analysis. Corrosion tests (linear sweep voltamperometry and chronoamperometry) were performed on uncoated and coated magnesium alloy in the Hank’s solution. In both cases, the hydrogen evolution method was used to calculate the corrosion rate after 7-days immersion in the Hank’s solution at 37 °C. It was found that the corrosion rate is 3.2 mm/year and 1.2 mm/year for uncoated and coated substrates, respectively. High corrosion resistance of Mg20Zn alloy covered by multilayer coating (CaP coating + chitosan water glass) is caused by formation of CaSiO3 and Ca3(PO4)2 compounds on its surface.

X-ray photoelectron spectroscopy investigations of zinc–magnesium alloy coated steel

2010 ◽  
Vol 124 (1) ◽  
pp. 472-476 ◽  
Author(s):  
Sheng Chen ◽  
Fei Yan ◽  
Fei Xue ◽  
Lihong Yang ◽  
Junliang Liu
Keyword(s):  
Magnesium Alloy ◽  
Photoelectron Spectroscopy ◽  
Coated Steel ◽  
X Ray

scholarly journals Corrosion Behavior and Mechanism of Carbon Ion-Implanted Magnesium Alloy

Coatings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 734
Author(s):  
Banglong Yu ◽  
Jun Dai ◽  
Qingdong Ruan ◽  
Zili Liu ◽  
Paul K. Chu
Keyword(s):  
Electron Microscopy ◽  
Magnesium Alloy ◽  
Ion Implantation ◽  
Electron Energy ◽  
Photoelectron Spectroscopy ◽  
Density Functional ◽  
Electronic Density ◽  
Carbon Ion ◽  
X Ray ◽  
Ion Implanted

Carbon ion implantation was conducted on an AM60 magnesium alloy with fluences between 1 × 1016 and 6 × 1016 ions/cm2 and an energy of 35 keV. The microstructure and electrochemical properties of the samples were systematically characterized by X-ray photoelectron spectroscopy, X-ray diffraction, Raman scattering, scanning electron microscopy, transmission electron microscopy, and electrochemical methods. These studies reveal that a 250 nm-thick C-rich layer is formed on the surface and the Mg2C3 phase embeds in the ion-implanted region. The crystal structure of the Mg2C3 was constructed, and an electronic density map was calculated by density-functional theory calculation. The large peak in the density of states (DOS) shows two atomic p orbitals for Mg2C3. The main electron energy is concentrated between −50 and −40 eV, and the electron energy mainly comes from Mg (p) and Mg (s). The electrochemical experiments reveal that the Ecorr is −1.35 V and Icorr is 20.1 μA/cm2 for the sample implanted with the optimal fluence of 6 × 1016 ions/cm2. The sample from C ion implantation gives rise to better corrosion resistance.

scholarly journals Effects of Ti, Ni, and Dual Ti/Ni Plasma Immersion Ion Implantation on the Corrosion and Wear Properties of Magnesium Alloy

Coatings ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 313
Author(s):  
Jun Dai ◽  
Zheng Liu ◽  
Banglong Yu ◽  
Qingdong Ruan ◽  
Paul K. Chu
Keyword(s):  
Magnesium Alloy ◽  
Ion Implantation ◽  
Photoelectron Spectroscopy ◽  
Wear Test ◽  
Corrosion And Wear ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
X Ray ◽  
Bonding Properties ◽  
Plasma Immersion Ion Implantation

Ti, Ni, and Ti/Ni plasma immersion ion implantation is carried out on the AM60 magnesium alloy with a 6 × 1016 ions/cm2 fluence and energy of 35 keV. The corrosion and wear properties of the ion-implanted samples are determined systematically by X-ray photoelectron spectroscopy, X-ray diffraction, scanning electron microscopy, electrochemical methods and wear tests. A Ni-rich layer composed of α-Mg, Ni2O3, and NiTi2 is formed on the surface after dual Ti/Ni ion implantation, and the ion implantation range is approximately 300 nm. The corrosion resistance of the Ni- and Ti/Ni-implanted AM60 samples is significantly reduced in the 3.5% NaCl solution. However, NiTi2 does not adhere well to the grinding ring during the wear test due to the bonding properties, and the sample implanted with both Ti and Ni shows the best wear resistance.

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