An Effect of Process Parameters to Anodic Thickness in Hard Anodizing Process

2016 ◽  
Vol 872 ◽  
pp. 168-172
Author(s):  
Aunyanat Rattanasatitkul ◽  
Suksan Prombanpong ◽  
Pongsak Tuengsook
Keyword(s):  
Experimental Design ◽  
Oxide Film ◽  
Aluminum Oxide ◽  
Process Parameters ◽  
Cycle Time ◽  
Treatment Process ◽  
Aluminum Surface ◽  
Design Technique ◽  
Defect Rate ◽  
Hard Anodizing

The anodizing process is an aluminum surface treatment process which an aluminum oxide film forms on an aluminum substrate. Typically, the anodic thickness is a required specification which depends upon current density and anodizing cycle time. In addition, another important factor is ramp time which must be proper set to prevent a burn defect. Thus, this paper investigates a relationship among these three factors to determine the setting condition which minimizes the anodizing cycle time. Moreover, the required thickness must be obtained without increasing the burn defect rate. The experimental design technique is proposed to achieve this goal and it is found that the current of 35 amp, ramp time of 340sec and anodizing time at 1400 sec ensure the obtained anodic thickness greater than 30 micron.

Optimization of Alkali Treatment Process Parameters for Kenaf Fiber: Experiments Design

2020 ◽  
pp. 1-10
Author(s):  
R. Sathish Kumar ◽  
Nivedhitha Muralidharan ◽  
Ravishankar Sathyamurthy
Keyword(s):  
Process Parameters ◽  
Treatment Process ◽  
Alkali Treatment ◽  
Kenaf Fiber

scholarly journals Impact of Process Parameters on the Diameter of Nanobubbles Generated by Electrolysis on Platinum-Coated Titanium Electrodes Using Box–Behnken Experimental Design

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2542
Author(s):  
Karol Ulatowski ◽  
Radosław Jeżak ◽  
Paweł Sobieszuk
Keyword(s):  
Experimental Design ◽  
Process Parameters ◽  
Current Density ◽  
Salt Concentration ◽  
Multivariate Regression ◽  
Electrical Energy ◽  
Multiphase System ◽  
Anova Analysis ◽  
Dependent Variables ◽  
Parameter Function

(1) The generation of nanobubbles by electrolysis is an interesting method of using electrical energy to form bubble nuclei, effectively creating a multiphase system. For every process, the effectiveness of nanobubble generation by electrolysis depends on various process parameters that impact should be determined. (2) In this work, the electrolytic generation of hydrogen and oxygen bubbles was performed in a self-built setup, in which a Nafion membrane separated two chambers. The generation of bubbles of both gases was investigated using Box–Behnken experimental design. Three independent variables were salt concentration, current density, and electrolysis time, while the dependent variables were Sauter diameters of generated bubbles. An ANOVA analysis and multivariate regression were carried out to propose a statistical and power model of nanobubble size as a process parameter function. (3) The generation of bubbles of hydrogen and oxygen by electrolysis showed that different factors or their combinations determine their size. The results presented in this work proved to be complementary to previous works reported in the literature. (4) The Sauter diameter of bubbles increases with salt concentration and stays constant with increasing current density in investigated range. The proposed correlations allow the Sauter diameters of nanobubbles generated during electrolysis to be predicted.

Fabrication of Anodic Aluminum Oxide Film on Large-Area Glass Substrate

2007 ◽  
Vol 10 (12) ◽  
pp. C69 ◽  
Author(s):  
Ching-Jung Yang ◽  
Shih-Wei Liang ◽  
Pu-Wei Wu ◽  
Chih Chen ◽  
Jia-Min Shieh
Keyword(s):  
Oxide Film ◽  
Aluminum Oxide ◽  
Glass Substrate ◽  
Anodic Aluminum Oxide ◽  
Large Area ◽  
Anodic Aluminum Oxide Film ◽  
Aluminum Oxide Film ◽  
Anodic Aluminum

Strength and Adhesion of Thin Aluminum Oxide Film Deposited on Iron Surface

1993 ◽  
Vol 115 (4) ◽  
pp. 615-619 ◽  
Author(s):  
M. Nakanishi ◽  
H. Okuya ◽  
K. Nakajima
Keyword(s):  
Oxide Film ◽  
Aluminum Oxide ◽  
Substrate Surface ◽  
Iron Surface ◽  
Indentation Hardness ◽  
Aluminum Oxide Film ◽  
Thin Aluminum ◽  
Atomic Mixing ◽  
Scratch Tests ◽  
Sputter Etching

The strength of deposited film and the adhesion between the film and the substrate were investigated with deposited aluminum oxide film on iron surface by scratching the surface with a diamond cone. Two types of samples were examined, one with oxide film deposited after cleaning the substrate surface by sputter etching, the other with the film deposited without any sputter etching. It was found that a law similar to Meyers’ for indentation hardness holds between the load and scratch width on the sample examined. These results suggest that by analyzing the scratch data the adhesion strength of the film to the substrate can be estimated together with the hardness of the film itself. Analyses by EPMA (electron probe X-ray microanalyzer) and AES (Auger electron spectroscopy) were conducted to correlate the results obtained by the scratch tests and friction experiments, and it was confirmed that (i) adhesion is improved by sputter etching prior to the deposition of the film; (ii) adhesion decreases considerably due to the progress of oxidation in the vicinity of the interface, which depends markedly on the oxygen concentration in the oxide film; and (iii) there is an optimum thickness of the three-component layer (Fe, Al, and O) formed by atomic mixing at the interface for maximizing the adhesion.

Structure of the Ultrathin Aluminum Oxide Film on NiAl(110)

Science ◽  
2005 ◽  
Vol 308 (5727) ◽  
pp. 1440-1442 ◽  
Author(s):  
G. Kresse
Keyword(s):  
Oxide Film ◽  
Aluminum Oxide ◽  
Aluminum Oxide Film

Study on Anodizing Processes for Formation of Nano Porous Aluminum Oxide Thin Films

2011 ◽  
Vol 236-238 ◽  
pp. 3061-3064
Author(s):  
Thein Thein Kyaw ◽  
Kyaw Myo Naing ◽  
Nyunt Win
Keyword(s):  
Oxide Film ◽  
Aluminum Oxide ◽  
Sulphuric Acid ◽  
Anodic Oxide ◽  
Film Coating ◽  
Anodic Oxide Film ◽  
Oxide Thin Film ◽  
Operation Condition ◽  
Porous Aluminum ◽  
Coating Weight

In this paper aluminum oxide thin film was prepared by anodic oxidation in various acid baths such as sulphuric acid, chromic acid and phosphoric acid with different concentrations. The thickness and appearance of the anodized films formed has been compared. The thicknesses of anodic oxide film, coating weight per unit area and coating ratio of anodic oxide film variation were determined with respect to the different electrolyte concentrations by using the thickness determination formula. Sulphuric acid gives the highest thickness aluminum oxide films, in the operation condition of 15% H2SO4solution composition, 15V, 30±2°C, 100 mA, 60 mins.

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