HARD ANODIZING OF
2XXX SERIES OF ALUMINUM ALLOYS

William W. Corcoran, Sanford Process Corporation
Leonid M. Lerner, Sanford Process Corporation

Results of the Study

Table 1 displays the different data related to the hardcoating processes in the experiment.

• Column#1 is the name of the process and identifies the part number of each sample. The power supplies used were High Voltage DC and Low Voltage DC + AC. In each case we tested samples with and without the use of an organic additive.
• Column#2 contains the electrolyte composition.
• Column#3 contains the electrolyte concentration in grams per liter
• Column#4 contains the temperature of electrolyte in Cº during the hardcoating process
• Column#5 contains the temperature of electrolyte in Fº during the hardcoating process
• Column#6 shows the time of the hardcoating process in minutes
• Column#7 shows the maximum voltage used in the hardcoating run.

• Column#8 shows the maximum current density (Amps/sq. ft.) reached during the hardcoating run.

• Column#9 shows the thickness of the coating in mils, determined by averaging at least nine measurements from different spots of the samples.
• Column#10 is the measurements of power draw by stand-alone kWh meter (calibrated: 1KWhr = 64)

Introduction
Background of Study
Results of Study
Conclusions

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