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Growth of anodic oxidation film
Growth of anodic oxidation film
main main
Change of Coefficient of Friction per Temperature Change
  Sulfuric Acid Anodizing (White / Color) Sulfuric Acid Hard Anodizing
Processing
Outline
Most common processing
processed in a sulphate bath
Processed in a low-temperature electrolysis
vessel, generating thick hard oxidation film
Color
Usually white, but able to dye arbitrary colors
Usually grey, but varies per film thickness
Hardness
Aprx.200HV
Aluminum < Anodized Al < Steel
400HV +
Steel (Non-Heat Treated) < Hard Anodized Al
Coating
Thickness
Generally 5 ~ 25 μm
Generally 20 ~ 75 μm per wear resistant /
electrical insulation properties
Specifications
Half dimension of total film thickness
is grown film, and the other half is penetrated
Half dimension of total film thickness is grown film,
and the other half is penetrated
main main
  main Building Materials, Industrial Materials, Household Articles, Accessories, etc.
  Examples
Aluminum Wheels Window Frames Cellular Phones
Aluminum Wheels Window Frames Cellular Phones
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  main   Shafts, Rollers, Pistons, Air Craft Parts, etc.
  Examples
Engine Pistons, etc.
Engine Pistons, etc.
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