Alodine

[Lyndon S.]

Alodine anyone used that to dye a carburetor body with that? I head that it will give it the gold dichromate look?

[Joe L.]

Re: Alodine

Kelly-----

Alodine is a concentrated solution of chromic acid (sulphuric acid + potassium dichromate). It is VERY nasty stuff. I don't know where you could get any but, even if you could, I would not recommend messing with it.

[Joe L.]

Re: Alodine

Kelly-----

Alodine is a concentrated solution of chromic acid (sulphuric acid + potassium dichromate). It is VERY nasty stuff. I don't know where you could get any but, even if you could, I would not recommend messing with it.

[Michael M.]

Re: Alodine

Alodine is commonly used as a surface prep when preparing bare aluminum for primers. It use to be readily available from Dupont suppliers. It was called Alodine 1201 as best I remember. I know it is still used in the aircraft industry and also in the marine industry. Good Luck!

[Michael M.]

Re: Alodine

Alodine is commonly used as a surface prep when preparing bare aluminum for primers. It use to be readily available from Dupont suppliers. It was called Alodine 1201 as best I remember. I know it is still used in the aircraft industry and also in the marine industry. Good Luck!

[Duke W.]

Re: Alodine

Alodine is used to prep aluminum for painting. It is applied after the phosophoric acid wash (PPG's name for this is Alumiprep.)

Alodine is a "conversion coating" that reacts with the bare aluminum to form an oxide, which prevents corrosion under the paint, but I don't know the specific chemical reactions.

Both Alumiprep and Alodine should be diluted according to the label instuctions and PPG tech sheets.

Alumiprep usually results in a fairly bright aluminum color since it strips away any surface oxides. Alodine then dulls the surface somewhat to a mottled gray since it reforms an oxide, but it does not yield the "gold" finish on Holleys.

It might do something different if used full strength, but I've never tried that.

Duke

[Duke W.]

Re: Alodine

Alodine is used to prep aluminum for painting. It is applied after the phosophoric acid wash (PPG's name for this is Alumiprep.)

Alodine is a "conversion coating" that reacts with the bare aluminum to form an oxide, which prevents corrosion under the paint, but I don't know the specific chemical reactions.

Both Alumiprep and Alodine should be diluted according to the label instuctions and PPG tech sheets.

Alumiprep usually results in a fairly bright aluminum color since it strips away any surface oxides. Alodine then dulls the surface somewhat to a mottled gray since it reforms an oxide, but it does not yield the "gold" finish on Holleys.

It might do something different if used full strength, but I've never tried that.

Duke

[Christopher R.]

Re: Alodine

You can find this stuff at aircraft parts and accessories places. I bought some a few years ago. Believe it does come in a yellowish color and clear.

[Christopher R.]

Re: Alodine

You can find this stuff at aircraft parts and accessories places. I bought some a few years ago. Believe it does come in a yellowish color and clear.

[Dick W.]

Re: Alodine

At full strength it still does not leave a gold/yellow finish. You need a dichromate for that.

[Dick W.]

Re: Alodine

At full strength it still does not leave a gold/yellow finish. You need a dichromate for that.

[Michael B.]

Re: Alodine

Still used in the Aircraft Industry.

Try Aircraft Spruce & Specialty in Corona CA.




Metal Prep Products at Aircraft Spruce

[Michael B.]

Re: Alodine

Still used in the Aircraft Industry.

Try Aircraft Spruce & Specialty in Corona CA.




Metal Prep Products at Aircraft Spruce

[Joe L.]

Re: Alodine

chris-----

All I can figure is that the solution commercially available is a rather dilute solution of Alodine. Alodine is a commercial name for a proprietary conversion coating. It was once a product and trademark owned by Amchem Corporation and it was exclusively manufactured for years right here in Fremont, CA in a very nondescript plant in the Niles district (right down the street from where Charlie Chaplin once made silent movies for the Essanay Studios).

The formula for Alodine is a very closely held trade secret. However, I can tell you that its main ingredients are as I described previously. Potassium dichromate is a VERY toxic substance and is a conservative toxicant (i.e. it is not "broken down" in the environment).

About 20 years ago, Amchem was bought out by Henkel Corporation, a large German chemical conglomerate. They continued to make Alodine in Niles for many years. However, due to environmental concerns, they closed the plant down several years ago. I don't know where they make it now----probably China.

[Joe L.]

Re: Alodine

chris-----

All I can figure is that the solution commercially available is a rather dilute solution of Alodine. Alodine is a commercial name for a proprietary conversion coating. It was once a product and trademark owned by Amchem Corporation and it was exclusively manufactured for years right here in Fremont, CA in a very nondescript plant in the Niles district (right down the street from where Charlie Chaplin once made silent movies for the Essanay Studios).

The formula for Alodine is a very closely held trade secret. However, I can tell you that its main ingredients are as I described previously. Potassium dichromate is a VERY toxic substance and is a conservative toxicant (i.e. it is not "broken down" in the environment).

About 20 years ago, Amchem was bought out by Henkel Corporation, a large German chemical conglomerate. They continued to make Alodine in Niles for many years. However, due to environmental concerns, they closed the plant down several years ago. I don't know where they make it now----probably China.