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Rectifier Voltage
We are in the process of having a rectifier built to accomodate future plans. Wanted to know if anyone has any experience with these - looking at having a 200 - 300 amp built and want to know if the voltage needs to be any higher than 30 volts for anodizing.
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Re: Rectifier Voltage
I'd be happy to find one that would do 50 or 100 amps CC that wouldn't break my bank. 30V should handle up to a 12 ASF. It all depends on if you will want to get into the higher CD's.
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Re: Rectifier Voltage
So, would you go higher on the voltage to do say 3000 sq. inches
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Re: Rectifier Voltage
The voltage needed depends on the current densities you are going to run. Running a 3000" SA at a 4.5A CD calculates to a 93.75A setting with a peak voltage of 11.25V . If you are runniing LCD, then 30V will work.
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Re: Rectifier Voltage
What is your formula for calculating this?
Also, I want to increase current to 12 amps/sq ftComment
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Re: Rectifier Voltage
All my calculations are from the 720 rule and the results from Fibergeeks tests where he compared CD's, material types and other parameters. He measured the coating thicknesses with a current eddy meter to help verify his results.
If you plan on going to 12ASF, which is the highest with a 1:3 acid ratio, then I would try to go to a 40V supply. The calculation for peak voltage is CD x 2.5 . This is effected by several parameters and with an accurate SA will vary +-5V and I would add a extra 5V for possible miscalculation of SA.
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Re: Rectifier Voltage
So if I were to maintain a maximum current of 6 amps, would a 0-15 volt, 185 amp CC/CV rectifier do the job?
Where can I find Fibergeeks tests?
Thanks again.Comment
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Re: Rectifier Voltage
0-15V will work, 0-18V would be better. Running that many amps in a tank will generate some heat, how are you planning to maintain the tank temp.?
I was lucky enough to start anodizing before Fibergeek passed away and talked to him on the forum quite a bit. His test results are scattered in the forum posts. You can run a search on posts by him to find the info he posted. I don't have a place where all the results are together.
These are his test graphs:
http://forum.caswellplating.com/phot...user/5846/sl/f
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Re: Rectifier Voltage
Going to have a 75 gallon rectangular tank inside a 140 gallon rectangular tank with ice water circulating around it. I have tried several methods and feel this is the best - works out to almost the same ratio of water to cool the anodizing. Also going with circulating pump for the acid to keep heat off parts.Comment
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Re: Rectifier Voltage
I'm setting up a 60 gal tank now. I decided to go with a chiller unit. Let me know how it works. The pump for agitation will help alot. I've been using a pump for awhile. I like it much better than aeration.
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Re: Rectifier Voltage
"Chiller unit"? Do you have any pictures? Where did you get this from?Comment
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Re: Rectifier Voltage
The one I am waiting on is on backorder. It's the CC25-mod. I was told it is borderline on being big enough but the price was right compared to the others I looked at and I figured insulation would make a big difference. You just need to make sure it has a Ti heat exchanger.
http://www.aquastealth.com/
This place only sells to distributors but has all kinds.
http://www.pacificcoastimports.com/
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