amps / sq. in.

[johnmorgan]

Are the amps per sqare inch calculated as 144 sq. in. on a plate of 12"x12"x1/2" or at 312 sq. in. ?

[cameraman]

It would be 312.

[RedRiver]

Yip...Total surface area, meaning both sides of the 12"x12" plate.

[acidrain]

Originally Posted by RedRiver

Yip...Total surface area, meaning both sides of the 12"x12" plate.

Plus the 1/2 in edge.
Yes, 312 sq. in.

[RedRiver]

Originally Posted by acidrain

Plus the 1/2 in edge.
Yes, 312 sq. in.

Ohhh.....Acid, now you're just nit-picking! LoL...Good call bud! I sometimes take things for granted. I knew that - I took it for granted that the reader would...That's why you're so darn good at this Acid...So darn good!

Cheers!
- Dan

[johnmorgan]

Originally Posted by cameraman

It would be 312.

Thanks, I figured that but wasn't sure if I was being told correctly or not. You know how communication is in this world, nobody really says what they mean. Anyway, being new to this forum, how does one delete the original question that I posted.

[RedRiver]

You can't delete it yourself...Its there to haunt you for the duration of your stay...

Why would you want to delete it? It wasn't a stupid question, non are. Others may learn from this post just as you have. We try to encourage that people "Search & Read" before posting new question.

Ha! I said "We" as if I'm part of the administration of this website. I'm not...Just a vistor like yourself.

Cheers!
- Dan

[johnmorgan]

Thanks guys, I just thought that I would unclog the mail. Nothing to be ashamed about here. LOL. Hey one more question. When I remove the parts from the anodizing tank, it tends to be a little chalky if you would. Is that because the acid isn't balanced or something else?

[RedRiver]

1. What is the temperature of the electrolyte?
2. What current density (ASF) are you anodizing at?
3. What is the surface area and how long are you anodizing for?
4. What is the acid concentration (% by volume) of the electrolyte.

Answer the above and perhaps one of us can answer your intial question.

- Dan

[cameraman]

By 'chalky', could it also be described as 'cloudy'?
When I'm anodizing, I get bubbles that form on the cathodes and get swirled by the agitation. When I'm doing larger surface areas, it gets going so good that you can't see very far into the tank, then begins to clear when I've removed power.
If that's what you're seeing, it's nothing to worry about - actually I like seeing it, tells me lotsa stuff happnin. In reality I don't think it's terribly conclusive, I've done many runs that don't look very active but dye just as well.