Powder Coating Cast Aluminum..
#1
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Has anyone looked at base coatings like Alodine as a base treatment before PC'ing cast parts?
With that process, of course comes acid etching to clean the somewhat porous surface of a cast part.
Just wondering if anyone has had PC issues with long term adhesion.
Thanks!
With that process, of course comes acid etching to clean the somewhat porous surface of a cast part.
Just wondering if anyone has had PC issues with long term adhesion.
Thanks!
#2
Team Owner
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
what parts are you trying to coat?
I had my intake and cam covers PCed thats it,
just bead blasted them first
I had my intake and cam covers PCed thats it,
just bead blasted them first
#3
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Thats what I would normally do, but you never have a clean alum surface to adhere to..it oxidizes too fast.
The question came from working on aviation repairs..so I was just wondering.
The question came from working on aviation repairs..so I was just wondering.
#5
Former Vendor
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Alodine works fine on the intake and valve covers. I thinbk that it oxidizes the surface and makes it more stable. If you take a freshly bead blasted surface, it turns it "dark" like the magnesium has been sitting around for a few years.
Alodine on aluminum is pretty standard stuff.
Alodine on aluminum is pretty standard stuff.
#6
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I'll search..and see if I still cant find out what the specific Al or MG alloy these parts are.
#7
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Alodine works fine on the intake and valve covers. I thinbk that it oxidizes the surface and makes it more stable. If you take a freshly bead blasted surface, it turns it "dark" like the magnesium has been sitting around for a few years.
Alodine on aluminum is pretty standard stuff.
Alodine on aluminum is pretty standard stuff.
It creates a chromate coating..doesnt prevent wear, but its an awesome bonding surface for paint or PC..whereas the always oxidized alum surface isnt so much.
Trending Topics
#9
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Magnesium requires a chemical conversion to be performed to protect and prepare the surface. Check AMS-M-3171 for more specifics.
#10
Three Wheelin'
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Look into Dow #7 for magnesium. It's a great look
by itself. The original Halibrand mag wheels were
Dow 7 coated (golden brown). Over a polished surface it's even better.
See if you can get a scrap intake or cam cover to
test with & to see if you like it.
http://www.saporitofinishing.com/pro...esium-aluminum
by itself. The original Halibrand mag wheels were
Dow 7 coated (golden brown). Over a polished surface it's even better.
See if you can get a scrap intake or cam cover to
test with & to see if you like it.
http://www.saporitofinishing.com/pro...esium-aluminum
#11
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Look into Dow #7 for magnesium. It's a great look
by itself. The original Halibrand mag wheels were
Dow 7 coated (golden brown). Over a polished surface it's even better.
See if you can get a scrap intake or cam cover to
test with & to see if you like it.
http://www.saporitofinishing.com/pro...esium-aluminum
by itself. The original Halibrand mag wheels were
Dow 7 coated (golden brown). Over a polished surface it's even better.
See if you can get a scrap intake or cam cover to
test with & to see if you like it.
http://www.saporitofinishing.com/pro...esium-aluminum
#12
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Plenty of people have powder coated the water bridge and the upper water outlet and both are cast aluminum. AFAIK none of them have proven to be problems with adhesion.
#13
Rennlist Member