Hydrogel Based Anodization: A Novel Technique to Form Ordered Nano-sized Porous Oxide Layer on the Aluminum Surface

JOM ◽  
2022 ◽  
Author(s):  
Yasar Yilmaz ◽  
Ali Gelir ◽  
Azize Gomleksiz ◽  
Sevim Senacay
2016 ◽  
Vol 61 (3) ◽  
pp. 1601-1606
Author(s):  
A. Posmyk ◽  
M. Cholewa ◽  
J. Wieczorek ◽  
D. Scelina

Abstract The article presents the preparation process of AC-AlSi12 aluminum alloy surface by application of anodic oxidation method. The method enables the formation of a porous oxide layer (Al2O3) which generates the substrate of durable adhesive bond with an epoxy resin. It also presents the influence of the form of silicon precipitates in the modified alloy upon anodizing process, uniform structure and thickness of the oxide layer as well as the topography of its surface which is expected to improve adhesion of the resin and silumin. The paper describes how the position of oxidized surface against the negative electrode influences the coating structure. The studied silumins are intended to form the material for casting of 3 dimensional objects whose parts will change the distribution of electric field strength that may cause non-uniform structure of the coating.


2018 ◽  
Vol 145 ◽  
pp. 05012 ◽  
Author(s):  
Nelly Gidikova ◽  
Maciej Sulowski ◽  
Marcin Madej ◽  
Radoslav Valov ◽  
Vladimir Petkov

Aluminum offers engineers weight saving advantages in their product design. However, aluminum has poor wear and friction properties. In addition, the surface oxide layer of this chemically active metal, which gives it the corrosion resistance, makes it a very difficult metal to plate [1]. Specific pre-treatment must be applied to remove the oxide layer from the aluminum surface. The nanodiamond particles additionally facilitates the process of chromium deposition. The object of this study is to evaluate the impact of nanodiamonds on the mechanical properties of the chromium coating plated on


2009 ◽  
Vol 29 (6) ◽  
pp. 1923-1934 ◽  
Author(s):  
X.J. Tao ◽  
S.J. Li ◽  
C.Y. Zheng ◽  
J. Fu ◽  
Z. Guo ◽  
...  

Author(s):  
Hiroshi Abe ◽  
Yutaka Watanabe

Detailed FAC processes and effects of local H2 partial pressure, oxide film porosity, and Cr content on the enhancement of dissolution through the oxide layer have been discussed focused on the result of FAC experiments and oxide layer characterizations. Porosity of oxide layer is closely related to corrosion resistance of the steels even in Cr content range of 0.003 to 1.01 wt %. Compact inner oxide layer suppress the diffusion of oxidizer (H2O) and Fe ion via pores, on the other hand, liquid-state diffusion through a porous oxide layer is considered to be dominant under high FAC rate conditions. The model of spiral enhancement of dissolution through the oxide layer has been proposed. It has been considered that FAC is enhanced with increase of local H2 partial pressure and film porosity. It has also been suggested that low solubility Fe-Cr spinel-type oxide formed on the high Cr content steels suppresses the spiral enhancement of dissolution through the oxide layer.


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