TABLE 1

 
 

Process, Conditions & Comparative Data for Hard Coating of Aluminum alloy 2024-T3
(with the same amount of Amper-Minutes for all processes)

  
 
 
Process Name & Sample ## Bath Electrolyte Concentr.
(gr/l) 		Temp.
(Cº/Fº) 		Process Time
(min) 		Voltage (max)
V 		Current Density (max)
A/sq.ft		 Film Thickness
(mils) 		Power draw
KWhr/64
1 2 3 4 5 6 7 8 9 10
HV DC
35"A" 		Sulfuric acid 300
300
300		 0
0
0
 32
32
32		 55
5
40 		50
65
60		 25
33
28		 1.8
burned
burned		  
HV DC
38,39 		Sulfuric acid with organic additive 300 0 32 90 60 31.5 2.1 163
LV
DC+AC
44,45
46,47 		Sulfuric acid 300
300		 7.2
0 		45
32		 46
60		 12.3
14.8		 33.75
33.75		 2.0
2.2		 100
166
LV
DC+AC
30,31
36,37 		Sulfuric acid with organic additive 300
300		 7.2
0		 45
32		 39
58		 12.1
13.8		 33.75
33.75		 1.8
1.9		 51
130
 
 
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