METHODS FOR PREPARING THE SURFACE OF ALUMINUM ALLOYS FOR ELECTROPLATING (review)

2021 ◽  
pp. 82-99
Author(s):  
D.V. Kravchenko ◽  
◽  
I.A. Kozlov ◽  
A.A. Nikiforov ◽  
◽  
...  
Keyword(s):  
Aluminum Alloys ◽  
Anodic Oxidation ◽  
Direct Application ◽  
High Porosity ◽  
Nickel Plating ◽  
Zinc Treatment ◽  
Chemical Methods ◽  
Scientific Publications ◽  
Combined Methods

A review of modern scientific publications in the field of methods for preparing the surface of aluminum alloys for electroplating is presented. It is shown that the most widely used methods of preparation are: zinc treatment, high-porosity anodic oxidation and immersion nickel plating. A number of combined methods for preparing the surface of aluminum alloys for electroplating are given. Methods of direct application of electroplating coatings on aluminum and its alloys without the use of a sublayer, both by electrolytic and chemical methods, are considered.

Evaluation on Microstructure of Aluminum Alloys Dedicated to Plasma Etcher

2011 ◽  
Vol 689 ◽  
pp. 343-349
Author(s):  
Zhi Hui Zhang ◽  
Shu Feng Liu ◽  
Ze Ming Sun ◽  
Xiao Dong Yan
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Anodic Oxidation ◽  
Scientific Basis ◽  
Secondary Phases ◽  
6061 Aluminum Alloy ◽  
Close Relationship ◽  
The Matrix ◽  
Hole Defects

The relationship between microstructure and anodic oxidation film on 6061 aluminum alloy dedicated to plasma etcher were mainly studied by OM, SEM and TEM. The results show that the quality of anodic oxidation film has close relationship with the microstructure of materials, the distribution of element and the morphology of secondary phases. The microstructure of foreign 6061 aluminum alloy is uniform, and there are not obviously segregation and cavity. Two kinds of secondary phases disperse over the grain, one is rich-Fe phase, and the other is Mg2Si. Certainly there are also few secondary phases distributing along the grain boundary. The sizes of all secondary phases are almost below 5mm. The size of rich-Fe phases in homemade aluminum alloys are about from 2mm to 15mm, these big-size phases will bring pin-hole defects, which form some channels sending F+ etc. into the matrix of aluminum alloy, then not only the equipment will be destroyed at last, but also products will be polluted. The evaluation on microstructure of aluminum alloy will provide scientific basis for nationalization of plasma etcher.

Combined methods for the production of aluminum alloys

2018 ◽  
pp. 39-43
Author(s):  
A. P. Lysenko ◽  
◽  
S. Yu. Shilovskiy ◽  
E. S. Kondrateva ◽  
◽  
...  
Keyword(s):  
Aluminum Alloys ◽  
Combined Methods

scholarly journals Surface hardening of aluminum alloys by chemical nickel plating

2017 ◽  
Vol 7 (2) ◽  
pp. 165-169 ◽  
Author(s):  
S. A. Zemljakov ◽  
A. M. Guriev ◽  
M. A. Guriev ◽  
S. G. Ivanov
Keyword(s):  
Aluminum Alloys ◽  
Surface Hardening ◽  
Nickel Plating ◽  
Chemical Nickel ◽  
Chemical Nickel Plating

2024 ALUMINUM OXIDE FILMS PREPARED BY THE INNOVATIVE AND ENVIRONMENT-FRIENDLY OXIDATION TECHNOLOGY

2020 ◽  
Vol 27 (12) ◽  
pp. 2050020
Author(s):  
YUNDAN YU ◽  
HONGLIANG GE ◽  
GUOYING WEI ◽  
LI JIANG ◽  
DONG ZHANG
Keyword(s):  
Aluminum Alloys ◽  
Anodic Oxidation ◽  
Dynamic Equilibrium ◽  
Potassium Dichromate ◽  
Oxide Films ◽  
Corrosion Current ◽  
Potassium Dichromate Solution ◽  
Anticorrosion Property ◽  
Environment Friendly ◽  
Oxidation Technology

A kind of environment-friendly anodic oxidation technology was used to oxidize 2024 aluminum alloys from mixed acid solutions to effectively improve the anticorrosion and mechanical performances. The influences of anode oxidation method on surface morphology, microstructure, composition, electrochemistry parameter, anticorrosion property were studied. Aluminum alloy oxidation is actually a dynamic equilibrium process of the formation and dissolution of oxide film which is composed of porous and non-porous layer. With the treatment of anodic oxidation, [Formula: see text]-Al2O3 and [Formula: see text]-Al2O3 structures were obtained on the surface of aluminum alloys, which contributed directly to the increase of anticorrosion performance. The potassium dichromate solution was used to seal the surface of oxide films to further improve the anticorrosion property. The oxide films sealed with potassium dichromate were covered with leaf-like structures resulting in larger corrosion resistance that attributed directly to the decrease of corrosion current.

MODERN TRENDS IN THE ANODIC OXIDATION OF ALUMINUM-LITHIUM AND ALUMINUM ALLOYS (review)

2019 ◽  
pp. 79-89
Author(s):  
V.A. Duyunova ◽  
◽  
I.A. Kozlov ◽  
M.S. Oglodkov ◽  
A.A. Kozlovа ◽  
...  
Keyword(s):  
Aluminum Alloys ◽  
Anodic Oxidation ◽  
Aluminum Lithium

scholarly journals Preparation of 1060, 2024 and 7075 Aluminum Alloy Anodic Oxide Films

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1498
Author(s):  
Chaojie Jing ◽  
Ruijue Wang ◽  
Fangchao Zhao ◽  
Lunwu Zhang ◽  
Qiongyao He ◽  
...  
Keyword(s):  
Aluminum Alloys ◽  
Anodic Oxidation ◽  
Constant Pressure ◽  
Oxide Films ◽  
Anodic Oxide ◽  
Phosphoric Acid Solution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Mixed Stage ◽  
Highly Uniform

On aluminum alloys of grades 1060, 2024 and 7075, regular and highly uniform oxide films were formed by anodic oxidation. Anodizing was carried out at a constant pressure in a phosphoric acid solution of various concentrations. Using scanning electron microscopy (SEM) and X-ray diffraction (XRD), the optimal characteristics of the method of anodic oxidation for forming uniform oxide films on aluminum alloys were determined: anodic oxidation time, temperature, voltage and the concentration of H3PO4. It was found that, in the process of anodizing, the films have gone through four stages: a non-porosity stage, a mixed stage, an ordered porosity stage and a disordered porosity stage.

Anodic oxidation of complex shaped items of aluminum and aluminum alloys with subsequent electrodeposition of copper coatings

2014 ◽  
Vol 87 (1) ◽  
pp. 54-60 ◽  
Author(s):  
T. I. Devyatkina ◽  
E. I. Yarovaya ◽  
V. V. Rogozhin ◽  
T. V. Markova ◽  
M. G. Mikhalenko
Keyword(s):  
Aluminum Alloys ◽  
Anodic Oxidation ◽  
Copper Coatings
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