September 2, 2017

Operating Condition of Electropolishing

Polishing is treated for base metal before anodizing process, but polishing after anodized also need, on this process we serve electropolishing to the anodized aluminum.

The below are the solution and operating Condition for Electropolishing Aluminum.

No.
Composition
Wt
(%)
Anodic Current Density
(A/sq.ft)
Voltage
(Volt)
Temperature
( 0C )
Treatment Period
(min)
1
Orthophosporic Acid
Sulphuric Acid
Chromic Acid
Water
65
15
6
14
200 - 250
12 - 15
70 - 80
2 - 5
2
Orthophosporic Acid
Sulphuric Acid
Chromic Acid
Water
43
43
3
11
300 - 500
12-15
70 - 80
2 - 5
3
Orthophosporic Acid
Sulphuric Acid
Chromic Acid
Water
36
36
4
24
200 - 400
12 - 15
70 -90
1 – 5
4
Orthophosporic Acid
Chromic Acid
Water
82
12
6
209 - 400
12 - 15
70 - 80
5 – 8
5
Trisodium Phosphate
Soda Ash
5
15
30 - 60
12 - 15
80 - 90
5 – 8
6
Hydrofluoboric Acid
1.25
15 - 30
20 - 30
30
10 - 20

See other metal coating method: Preparation for metal coating

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