Magnesium alloy AZ91D is friction stir processed by varying the process parameters namely tool rotation speed and tool traverse speed. The effects of friction stir processing parameters on the microstructural evolution, surface topography, microhardness, and corrosion rate of AZ91D alloy are investigated using the hybrid models, which are developed by integrating the quadratic function and
From Table 2, we can see that AZ31 Mg alloy has poor corrosion resistance due to high corrosion current density (−1.481 V) and low corrosion potential (1.12 × 10 −5 A/cm 2). On the other hand, as CNT concentration of the electrolyte increased in the PEO process, corrosion resistance was highly improved.
17/4/2018· If the magnesium alloy satisfies the above-described range, it has a 5 very low rate of degradation, and thus can be effectively used in the industrial and medical fields. In addition, the magnesium alloy has excellent corrosion resistance and strength.
The corrosion resistant coating used for metal magnesium comprises the following chemical compositions in percentage by weight: 40-45wt% of alloy powder, 3-6wt% of titanium carbonitride powder, 3-6wt% of silicon nitride powder, 7-8wt% of butanol and the
susceptibility to corrosion. Magnesium alloys, especially *Corresponding author. Tel.: q44-121-414-5217; fax: q44-121-414-5232. function of time on AZ91D alloy at constant temperature and pH. The coating thickness was directly proportional to the plating
Based on the results of various studies 38,39,40, the corrosion behavior of magnesium alloy with the MAO coating and hydrothermal treatment was predicted as below. The reaction is schematized in
NASA/TP-97-206239 The Corrosion Protection of Magnesium Alloy AZ31B M.D. Danford, M.J. Mendrek, M.L. Mitchell, and P.D. Torres Marshall Space Flight Center, Marshall Space Flight Center, Alabama National Aeronautics and Space Administration Marshall
Corrosion resistance of titanium ion implanted AZ91 magnesium alloy Chenglong Liu Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Yunchang Xin Department of Physics and Materials Science
Corrosion resistance of anodized surfaces on high-purity magnesium (99.95 mass%), rolled sheets of ASTM AZ31B (Mg-2.9Al-0.85Zn) magnesium alloy and die-cast plates of ASTM AZ91D (Mg-9.1Al-0.75Zn) magnesium alloy has been studied. Anodization was
The invention provides a coating capable of improving the surface corrosion resistance and biocompatibility of medical magnesium and magnesium alloy and a preparing method of the coating. An electrolyte is composed of an aqueous solution containing Zn2+ salt, Ca2+ salt, H2PO4- …
Abstract The electrochemical corrosion performance of E-coated, which is also known as electro-coated or electrophoresis-coated (a process of using direct current to deposit an organic coating), and powder-coated magnesium alloys AZ31 and AZ61 was
Magnesium Alloys - Co rrosion and Surface Treatments 50 The unsolvable corrosion product Mg(OH) 2 precipitates on the surface of magnesium alloy and form a surface layer. The layer could protect the magnesium alloy from being corroded slightly. However, this
Corrosion rate for AZ91D die-cast as a function of exposure time. 1438 R. Aat et al./Corrosion Science 42 (2000) 1433–1455 evident from the E h –pH diagram for magnesium …
Corrosion relationships as a function of time and surface roughness on a structural AE44 magnesium alloy
Publiions in 2012 Click paper title to view the full paper using Acrobat Reader (A) Journal Papers (* Invited) and Book Chapters (**)Q. L. Hu, J. L. Wang, J. Shen
In the present study, surface melting of a magnesium alloy, ZE41 (4%-Zn, 1%-RE) is performed by an Nd:YAG laser (operating in a continuous wave mode). The degree of microstructural refinement and the depth of the laser melted zone is a strong function of laser
28/2/2019· The iron or iron-containing material, even as a micro-scale particle on the surface of a magnesium alloy article, may function as a hode in an electrochemical corrosion reaction that leads to oxidation of nearby anodic magnesium.
Hamed Amiri, Iman Mohammadi, Abdollah Afshar, Electrophoretic deposition of nano-zirconia coating on AZ91D magnesium alloy for bio-corrosion control purposes, Surface and Coatings Technology, 10.1016/j.surfcoat.2016.12.103, 311, (182-190), (2017).
View Corrosion action and passivation mechanism of magnesium alloy in fluoride solution.pdf from ENG 206 at Tianjin University. Corrosion action and passivation mechanism of magnesium alloy
20/10/2014· High cycle fatigue behavior of different regions in a low-pressure sand-cast GW103K magnesium alloy component - Volume 29 Issue 21 - Longkang Jiang, Wencai Liu, Yanlei Li, Guohua Wu, Wenjiang Ding Different parts of a casting may receive different
19/9/2013· Since the 90 years the electronics industries try to obtain a new type of clean magnesium alloy known as eco-magnesium alloy [27-28]. Finally in 2012, one of these real advances was developed for LG by the Korea Institute of Industrial Technology (KITECH) with funding from the Korean government, for parts being produced for all of its mobile phones.
An extruded low-alloyed Mg-Bi-Al-Zn alloy coining excellent tensile properties (YS = 201 MPa, EL = 29. 4%) with high corrosion resistance (Pi = 0.14 mm/a) for biomedical appliion is successfully developed in this study. The extruded alloy is mainly composed of dynamic recrystallized (DRXed) grains (2.32 ± 0.12 μm) and strongly textured coarse non-DRXed grains, as well as certain nano
11/4/2017· Macro corrosion surfaces of (a) conventional AZ31 alloy and (b) double extruded JDBM-2 alloy after exposing to physiological medium for 120 h and cleaning the corrosion products.(c) The corrosion
AbstractTo improve the corrosion and mechanical properties of the AM50 magnesium alloy, different amounts of the rare earth element gadolinium were used. The microstructure, corrosion and mechanical properties were evaluated by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, and electrochemical and mechanical stretch methods.
The poor corrosion resistance of the magnesium alloy restricts its widespread appliion []. A better understanding of their corrosion mechanism, and of the factors influencing their corrosion behaviour, is expected to lead to more corrosion-resistant Mg alloys [ 3 ].
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