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Zinc Chromate tech......

I know, im just curious what Boeing switched to. Cause it looks just like ryoken green!

This is the best google image i could find of what i work on. But all the parts are coated in ryoken green. Or so i thought. Imagine my disappointment when i come to find out that all the ryoken green i have seen is really just "green".
 
I think this is where the zinc phosphate bs comes into play. Its listed in the MSDS of rustolem self etching primer. I think people must think zinc something is zinc something...

Liquefied Petroleum Gas 68476-86-8 30.0 N.E. N.E. N.E. N.E.
Magnesium Silicate 14807-96-6 15.0 2 mg/m3 N.E. 0.1 mg/m3 (Respirable) N.E.
Acetone 67 -64-1 15.0 500 ppm 750 ppm 1000 ppm N.E.
n-Butyl Acetate 123-86-4 15.0 150 ppm 200 ppm 150 ppm N.E.
Toluene 108-88-3 5.0 20 ppm N.E. 200 ppm 300 ppm
Mineral Spirits 64742-88-7 5.0 100 ppm N.E. 100 ppm N.E.
Aliphatic Hydrocarbon 64742-89-8 5.0 100 ppm N.E. 100 ppm N.E.
Titanium Dioxide 13463-67-7 5.0 10 mg/m3 N.E. 15 mg/m3 (Total Dust) N.E.
Xylene 1330-20-7 5.0 100 ppm 150 ppm 100 ppm N.E.
Aromatic Petroleum Distillates 64742-94-5 5.0 N.E. N.E. N.E. N.E.
Zinc Phosphate 7779-90-0 5.0 N.E. N.E. N.E. N.E.
Ethylbenzene 100-41-4 1.0 100 ppm 125 ppm 100 ppm N.E.
Carbon Black
 
yup, the EPA has been chasing it out of the system for yrs....

I'm not a chemist.... but anything new and untried by me, needs to earn it's recommendation from me... I've been using various zinc washes for over 25 yrs, i know it works... modern replacements, I don't know... not saying it wont be good, just it's unproven to me...

I woud think Boeing would be using some pretty quality sh*t....
 
Found this in my searches. Just trying to see what the difference is between the two since so many people bring up the phosphatee stuff.

Zinc Chromate vs. Zinc Phosphate Primers
Q. Please explain the basic differences (pro and con) of the two primers with regard to application. We're painting aluminum castings to be used in a salt-water marine environment. Which primer type would be more appropriate?
Thank you.
A. Since you are coating aluminum castings for salt water marine water environment you will need excellent corrosion protection. Therefore, I would recommend zinc chromate over zinc phosphate. Many companies are moving away from zinc chromate because hexavanlent chromium is known to be a carcinogen. Therefore, if you decide to go that route, please be aware of OSHA's stringent regulations controlling hexavalent chromium (Cr VI) exposure. You are permitted to use the primer, but you are obligated to control the amount of Cr VI in the air and you must provide your painters with appropriate personal protective equipment (PPE).

I have not seen articles showing that zinc phosphate is equivalent to zinc chromate in terms of corrosion protection.

Finally, please be aware that the most critical aspect of the coating process is surface preparation of the aluminum castings. That is more important than your choice of zinc chromate versus zinc phosphate.
Click to expand...
 
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y5mgisi said:
Found this in my searches. Just trying to see what the difference is between the two since so many people bring up the chromate stuff.
Click to expand...

there ya go, pretty much confirms what I say...
 
They keep it local here but you have to be military to purchase it...they won't sell it to the public...
that's why I have to order it online...
 
update: most of what I can find on the interwebs is $64 a can and rising... I found a deal at $21.94 a can...:doah:(Moellers Green Zinc Chromate)
The Zinc Phosphate and yellow zinc primers are around $10 a can...
 
I haven't even looked in awhile, i have a couple cans and assume they will be the last i see.. high teens is the most i would consider spending...the phosphates a different animal...

i may buy a gallon kit of real zinc wash and shoot thru a gun to be true to my roots.. haven't priced it lately, but it's probably not cheap... it's either that or go epoxy, which i already do on the boats and have no issue with...

ya have to be dedicated, and organized, to shoot catalyzed primer all the time... parts included... gun washing station becomes a necessity..
 
I have 2 cans, and just started using 1 of them. I missed the run up just like I did with r12.
 
ryoken said:
I haven't even looked in awhile, i have a couple cans and assume they will be the last i see.. high teens is the most i would consider spending...the phosphates a different animal...

i may buy a gallon kit of real zinc wash and shoot thru a gun to be true to my roots.. haven't priced it lately, but it's probably not cheap... it's either that or go epoxy, which i already do on the boats and have no issue with...

ya have to be dedicated, and organized, to shoot catalyzed primer all the time... parts included... gun washing station becomes a necessity..
Click to expand...



Who knows? Maybe with a more reasonable Trump-era EPA these kinds of products can be brought back to the market.

(I'm also hopeful that BLM will be able to reverse the Obama-era land grabs that were so pervasive as well...) :deal:


-G
 
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