O‘zmu xabarlari Вестник нууз acta nuuz

 
 
 
 
Figure 3. 
Variation of the average interpore distance of nanostructured aluminum oxide films anodized in oxalic acid as a 
function of the concentration and temperature of the electrolyte and the voltage 
As the anode voltage increased from 10V to 40V, a linear increase in the porosity distance was observed from 36.5 nm to 
76 nm, respectively, and a linear decrease in the porosity distance was observed when the electrolyte concentration increased 
from 0.3M to 1M. Hence, the distance between the pores was found to be directly proportional to the voltage and inversely 
proportional to the electrolyte concentration. 
Thickness of the oxide layer 

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O‘zMU xabarlari Вестник НУУз ACTA NUUz
 
KIMYO 
3/1 2022 
- 343 -
The effect of anodizing process parameters on the formation of an oxide layer on the AAO surface was also studied, 
resulting in the fact that the oxide layer formation was directly proportional to all anodizing process parameters. As the 
electrolyte concentration increases, so does the thickness of the oxide layer, which can be explained by the high concentration of 
ions in the electrolyte. As the electrolyte temperature increases, the thickness of the oxide layer increases accordingly, for 
example, if the thickness of the oxide layer is 5 nm in 1 M electrolyte at 5 ºC, at 15 ºC, the oxide layer thickness average 58 nm 
(Fig. 4). 
 
 
 
 
Figure 4. 
Variation of the thickness of the oxide layer of aluminum oxide films anodized in oxalic acid as a function of the 
concentration and temperature of the electrolyte and the voltage 
The results show that the thickness of the oxide layer also increased linearly with increasing anode voltage, except when 
the electrolyte was 15 ºC with 1 M, i.e., when the voltage was 10 V, the oxide layer thickness average 18 nm at 15 V. the oxide 
layer thickness average 58 nm. 
Porosity 
The average porosity level of the AAO membrane formed as a result of anodic oxidation of aluminum was studied as a 
function of the anodizing process parameters: anode voltage, electrolyte concentration, and temperature. (Fig. 5). In general, 
porous AAO membranes with an average porosity of 13.2 to 33.2% were obtained for all parameters of the anodization process.