Morphology of nanoporous anodic films formed on tin during anodic oxidation in less commonly used acidic and alkaline electrolytes

2019 ◽  
Vol 362 ◽  
pp. 191-199 ◽  
Author(s):  
Leszek Zaraska ◽  
Karolina Gawlak ◽  
Magdalena Gurgul ◽  
Dominika Gilek ◽  
Marcin Kozieł ◽  
...  
Keyword(s):  
Anodic Oxidation ◽  
Anodic Films ◽  
Alkaline Electrolytes

Improvement of Corrosion Resistance of Rare Earth Element (REE)-Based Anodic Oxidation Coating on AZ91D Magnesium Alloy

2012 ◽  
Vol 187 ◽  
pp. 210-214 ◽  
Author(s):  
M.Z.M. Zain ◽  
S. Illias ◽  
M. Mat Salleh ◽  
K. Azwan Ismail ◽  
Z. Nooraizedfiza
Keyword(s):  
Corrosion Resistance ◽  
Rare Earth ◽  
Magnesium Alloy ◽  
Anodic Oxidation ◽  
Earth Metal ◽  
Immersion Test ◽  
Corrosion Property ◽  
Anodic Film ◽  
Anodic Films ◽  
Az91d Magnesium Alloy

Anodization is a useful technique for forming protective films on magnesium alloys and improves its corrosion resistance. Based on the rare earth metal (REE) salt solution, the optimum parameter was selected by comparing the anti-corrosion property of anodic film. The structure, component and surface morphology of anodic film and cross-section were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM) coupled with Energy Dispersive Spectroscopy (EDS). The corrosion behavior was evaluated by immersion test. In this paper, a dense anodic film approximately 20 µm thick was prepared on a AZ91D magnesium alloy through anodic oxidation coating. The results show that the anodic films were mainly composed of Mg17Al12, Mg17La2, MgO and amorphous compounds. The best corrosion resistance was obtained with specimen anodized in solution containing both lanthanum nitrate and magnesium, whose corrosion resistance is approximately 3 times higher than that of as-received AZ91D magnesium alloy.

Study on the Mechanism of the Anodic Oxidation of PAN-Based Carbon Fibers by Cyclic Voltammetry

2013 ◽  
Vol 774-776 ◽  
pp. 832-835
Author(s):  
Zhi Tao Lin ◽  
Bo Zhu ◽  
Xue Lin ◽  
Yang Chen ◽  
Yu Zhen Liu
Keyword(s):  
Oxygen Evolution ◽  
Anodic Oxidation ◽  
Carbon Fibers ◽  
Oxygen Evolution Reaction ◽  
Surface Oxidation ◽  
Cyclic Voltammograms ◽  
Affect Intensity ◽  
Activated Oxygen ◽  
Alkaline Electrolytes ◽  
Higher Temperature

The cyclic voltammograms (CVs) of polyacrylonitrile (PAN)-based carbon fibers (CFs) were measured in different electrolyte aqueous solutions, temperatures and concentrations. By analyzing the CVs, the mechanism of the anodic oxidation of PANbased CFs was investigated. The results show that the anodic oxidation of CFs is virtually the activated oxygen formed by oxygen evolution reaction of water reacts with the surface carbon of CFs. Although there are more activated oxygen formed in alkaline electrolytes, surface oxides of CFs are easier to be formed in acidic electrolytes. The higher temperature can make the oxygen evolution reaction of water and surface oxidation of CFs be easier and more violent. The variation in electrolyte concentration can affect intensity of the two reactions, whereas it does not affect the difficulty of the reactions.

Influence of Anodizing Process on Cohesive Property of Anodic Films on Aluminum Alloy with Rubber

2006 ◽  
Vol 11-12 ◽  
pp. 657-660
Author(s):  
Xiao Feng Zhang ◽  
Jing Sheng Zhang ◽  
Yong Lai Lu ◽  
Yan Dong Liu ◽  
Li Liu ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Sulfuric Acid ◽  
Anodic Oxidation ◽  
Normal Pressure ◽  
Styrene Butadiene Rubber ◽  
Drying Methods ◽  
Butadiene Rubber ◽  
Anodic Films ◽  
Bonding Properties ◽  
Aluminum Oxide Layer

The bonding properties between the solution polymerized styrene-butadiene rubber (SSBR) and 2A70 aluminum alloy with treatment of anodic oxidation by sulfuric acid or ethane acid were investigated. The influences of three treating methods were also studied. Two drying methods, which are vacuum method and normal pressure method affected on the properties of adhesive molecular immerging into the hole dispersing on the surface of aluminum alloy, were discussed. The results revealed that prolonging the time for anodic oxidation by both sulfuric acid and ethane acid can increase the thickness of the aluminum oxide layer.

scholarly journals TiO2 Coatings in Alkaline Electrolytes Using Anodic Oxidation Technique

2015 ◽  
Vol 8 ◽  
pp. 65-72 ◽  
Author(s):  
Alex Iván Kociubczyk ◽  
María Laura Vera ◽  
Carlos Enrique Schvezov ◽  
Eduardo Heredia ◽  
Alicia Esther Ares
Keyword(s):  
Anodic Oxidation ◽  
Alkaline Electrolytes ◽  
Tio2 Coatings ◽  
Anodic Oxidation Technique
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