Hi All,
I have anodized several small test pieces of 6061 1?dia. x 1 ?? long. They take color well and when passed through a rinse following dye bath (Caswell) very little dye leeches off into water. When placed in boiling water to seal very little dye leeches off into boiling water.
When I try a piece of 6061 about 6? dia. ?? it takes dye well, but when placed in boiling water to seal some of the dye leeches off into the water, to the point that the water turns the color and there is dye residue in the bottom of the sealing bath.
When I anodize the piece I use a 34 volt x 20amp c/c ? c/v power supply set to c/c. Following 720 formula for the 6? dia. piece I set the power supply at 2.6 amps. The volts start at about 8.8 and ramp up about .1 per 15 min. The volts never reach the voltage in the 720 formula. At 2 hours of anodize time the voltage is about 10 volts.
My question is why are the voltage numbers are so low.
Thanks, Jim
I have anodized several small test pieces of 6061 1?dia. x 1 ?? long. They take color well and when passed through a rinse following dye bath (Caswell) very little dye leeches off into water. When placed in boiling water to seal very little dye leeches off into boiling water.
When I try a piece of 6061 about 6? dia. ?? it takes dye well, but when placed in boiling water to seal some of the dye leeches off into the water, to the point that the water turns the color and there is dye residue in the bottom of the sealing bath.
When I anodize the piece I use a 34 volt x 20amp c/c ? c/v power supply set to c/c. Following 720 formula for the 6? dia. piece I set the power supply at 2.6 amps. The volts start at about 8.8 and ramp up about .1 per 15 min. The volts never reach the voltage in the 720 formula. At 2 hours of anodize time the voltage is about 10 volts.
My question is why are the voltage numbers are so low.
Thanks, Jim
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