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common problem
Common problem
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  • L-as-01 material turnover

  • 4040-2n180 industrial aluminum type

  • 40160 industrial aluminum profile

Contact APAs / contact us
Address: a3-2 Saida international industrial city, Xiqing Economic and Technological Development Zone, Tianjin
Email: lxc@apas.com.cn
Tel: 022-87920088
Fax: please contact the network administrator
Postcode: 300385
Hotline: 137021119190 (24-hour service hotline)
Common problem
  • Why is the anodic oxide film of aluminum profile green when electrolytic coloring in copper sulfate solution?
    The results show that the anodizing film of aluminum profile is usually reddish brown to black in copper sulfate solution, which is due to the precipitation of copper in the hole of aluminum profile oxide film
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  • Why does the oxide film sometimes glow during anodizing of aluminum profiles?
    There are three kinds of phenomena in the process of aluminum profile anodizing, namely spark discharge, electroluminescence and photoluminescence. When the voltage is increased to more than 100V in some electrolytic solution, crackling sound will occur, and the surface of aluminum profile oxide film will be
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  • Why are there pores on the oxide film of aluminum profile?
    Aluminum profiles are electrolyzed in sulfuric acid solution at constant voltage. The current time curve is shown in the figure, and the a ~ d regions are considered separately according to the physical and chemical methods;
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  • The reason why aluminum profile can not form anodic oxide film in nitric acid or formic acid solution?
    Anodic oxide film is a barrier layer formed on the surface of aluminum profiles after anodizing in sulfuric acid, phosphoric acid, chromic acid and other inorganic acid solutions or oxalic acid solutions;
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  • Why are the characteristics of anodic oxide film on aluminum profiles different under different electrolytic conditions?
    There are various reasons for the different characteristics of anodic oxide film on aluminum profile under different electrolytic conditions, which can be summed up as follows: different structure of aluminum profile oxide film, different composition of crystal, different electrolyte mixed into aluminum profile oxide film, and different water content;
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  • How to measure the thickness of oxide film barrier layer of aluminum profile?
    The thickness of the oxide film can be measured accurately from 1 μ m to 10 μ m by eddy current instrument;
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