Doing some experiments and need some alloy samples

[acidrain]

Hello all, I'm doing some experiments. I want to get a handle on identifying alloy types, and have had marginal success with observed smut colors. My hope is to have the following alloy types arranged in a photo so that side-by-side comparison of the smut can be demonstarted.
I need:
2024
6061
6052
5052
7075
Ideally, the size of each sample would be a good sized plate of about 6"x6"x1/4". I can machine any odd sized scraps to these dimensions.
I'll gladly pay shipping, but hope that the scraps can be donated as a group effort.
Any takers?
6061 is the easy one, and I already have that, so I'll take it off the list. Thanks all, -Acid

[acidrain]

Simply add your name to the list if you can help, then send me a PM, and I'll tell you where to ship and how to get re-imbursed for shipping (I have paypal if that works).

Originally Posted by acidrain

2024
6061 Acidrain
6052
5052
7075

[jamerson]

Ill check to see what i have laying around my dads machine shop, But for sure ill have some thing.

[rclint]

Originally Posted by jamerson

Ill check to see what i have laying around my dads machine shop, But for sure ill have some thing.

I have some 7075, some unknow cast and "billet" others, and could round up other cast parts as well, and maybe some wrought... pm me if you want them, they are not the size your refer to as a plate

One etches with a yellow smut, this is a cast piece that anodized great !!

7075 smuts black

Clint

[acidrain]

It looks like I might have hit the jackpot locally. Standby... I'm going to check it out today.

[archimedes]

Acid,
I have 2024 t3 here, but it is not in form or dimension you requested.
BTW-
No problem donating material and shipping costs to your efforts.

archi

[sdold]

Most (or all) 2024 T3 that I see is Alclad (pure aluminum on the surface for corrosion protection). I'm not sure if it's all that way, it's just something to watch for when getting a sample.

[acidrain]

I'm doing great guys. I picked up 2024, 5058, 6061, and 7075. I've already started on my experiments, and will show results maybe tomorrow.
One thing I was able to demonstrate (in a photo) is the color of the smut, and how easy or difficult it is to wipe with a rag for each alloy. It should be possible to determine alloys in this way.
I've also run each sample, individually at 6 amps per sq. ft., in a 70F 1:3 battery acid/water solution, carefully taking note of the volts every 5 minutes. I want to graph out my volts curve at the parameters I typically use. I'll use this data for other experiments coming up. I've run the parts for 1-1/2 hrs., and dyed them black. I typically need to run for 2 hrs at that CD to get a nice deep black. I want to compare the alloys side-by-side for color absorbsion.
More to come later...

[rclint]

It would be nice if you could also dip them in the caswell desmut to see if it will remove, on 7075 when you etch and it turns black the caswell desmut will remove every trace of smut, others I'm sure silicon will not do anything.

I have read about other smut removers would be nice to get some of this, but from reading it's a bit nasty

Keep us updated, looks like a sicky in the making, nice clear big images

Clint

[acidrain]

Originally Posted by rclint

It would be nice if you could also dip them in the caswell desmut to see if it will remove, on 7075 when you etch and it turns black the caswell desmut will remove every trace of smut, others I'm sure silicon will not do anything.

I have read about other smut removers would be nice to get some of this, but from reading it's a bit nasty

Keep us updated, looks like a sicky in the making, nice clear big images

Clint

Indeed, Caswell's de-smut removed all of the smut from all of he samples.