Just got PPG CHEMFOS 2008, rinse? concentration?
Just got PPG CHEMFOS 2008, rinse? concentration?
(OP)
I have a sample bag of PPG CHEMFOS 2008. It doesn't say a thing about how much water to add, concentration, etc.
The application guide states it should be daubed on a room temp.
In addition, it states to rinse off with CF 2008DEE and let sit for 20 seconds followed by a final rinse / dry.
What is CF 2008DEE?
Can i use tap water for the zinc phos and the rinse operations?
Thanks!
The application guide states it should be daubed on a room temp.
In addition, it states to rinse off with CF 2008DEE and let sit for 20 seconds followed by a final rinse / dry.
What is CF 2008DEE?
Can i use tap water for the zinc phos and the rinse operations?
Thanks!





RE: Just got PPG CHEMFOS 2008, rinse? concentration?
RE: Just got PPG CHEMFOS 2008, rinse? concentration?
Also, i don't have DI water handy for the rinse (or to mix with phosphate mix for that matter) - do i need? thinking tap water here.. but i can purchase distilled if it matters.
Also, this is listed at room temp to work fine, but most commercial phosphate tanks operate between 100 and 135F immersion. I could heat my part up slightly and do it that way, as i'm daubing on the phosphate and i doubt it would hold heat during rxn with metal.
RE: Just got PPG CHEMFOS 2008, rinse? concentration?
Can you provide some background on the purpose of this excercise? Is the intent to use this process to meet typical automotive requirements for a large number of parts? If so, then yes DI water is required and likely the phosphate should be heated. The sealer is definitely required if there will be any subsequent organic coating applied such as epoxy electrocoat.
RE: Just got PPG CHEMFOS 2008, rinse? concentration?
This is not for large production, not automotive (home project). There will be an organic (non e-coat) epoxy type coating ristant to UV and Solvents.
Will distilled water work in place of DI for small test parts?
How does the conditioner improve the performance? I will ask my PPG contact for a sample, but i don't want to be annoying, can we purchase it in samples?
Thanks very much.
RE: Just got PPG CHEMFOS 2008, rinse? concentration?
RE: Just got PPG CHEMFOS 2008, rinse? concentration?
Now, after researching i realize the conditioner helps prevent rust after cleaning, it also removes residule from the caustic cleaning. I'd like to get a poor mans conditioner but i have no clue where to start.
The Sealer is seeming more and more important since it acutally fillis in gaps in the phosphate crystal structure and conditions the surface for paint.. I'll post links here if i can find them in small qty.
RE: Just got PPG CHEMFOS 2008, rinse? concentration?
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Just got PPG CHEMFOS 2008, rinse? concentration?
I have an insanely powerful cleaner for post blasting; MI Clean 100 by Hubbard Hall http://www.hubbardhall.com/files/2002019.pdf .
If i go straight from MI Clean tub to City water rinse, then to distilled water rinse and then while still wet, directly to dauber phosphate application.. I could follow on with the sealer as they recommend. My friend at PPG said a lot of companies are starting to get rid of the sealer, but he will try to get me a sample.
Sealer sounds like its the icing on the cake and i can't see getting rid of it. i bet the chrome is even better.
What are the pitfalls in this process? Thx.