RePlating of hardware.
05-09-2011, 10:35 PM
#1
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RePlating of hardware.
What different types of plating did Porsche use at the factory on parts?
I know they used either a yellow Zinc Chromate or Zinc Wash on many of the bolts and other hardware, but some of the bolts, like the ones on the fuel rail covers and side covers for the intake have a black look to them, which I think is a phosphate of some sort.
I am going to go on a powder coat, and replate phase on my car, so any suggestions will be welcome. (except for you uncle Mitch, you lurking, hiding, friend of mine)
I know they used either a yellow Zinc Chromate or Zinc Wash on many of the bolts and other hardware, but some of the bolts, like the ones on the fuel rail covers and side covers for the intake have a black look to them, which I think is a phosphate of some sort.
I am going to go on a powder coat, and replate phase on my car, so any suggestions will be welcome. (except for you uncle Mitch, you lurking, hiding, friend of mine)
05-09-2011, 10:47 PM
#2
Do you only want factory plating? I think it's cadmium, but you can also use zinc as you mentioned.
05-09-2011, 10:55 PM
#3
Three Wheelin'
The 928 has zinc chromate stuff. Modern Porsches are different because of enviro-bullying. No more ZC harware.
Black oxide can be hard to have done around here reasonably. I recommend keeping some Tool Black on hand for blackening odds and ends. It gives it some good rust protection and is better for hardware than painting.
BTW, I have a friend that does powdercoating. If you want to drop some parts off but don't have time to chat, just pretend you're the uncle Mitch character again;-)
Black oxide can be hard to have done around here reasonably. I recommend keeping some Tool Black on hand for blackening odds and ends. It gives it some good rust protection and is better for hardware than painting.
BTW, I have a friend that does powdercoating. If you want to drop some parts off but don't have time to chat, just pretend you're the uncle Mitch character again;-)
05-09-2011, 11:01 PM
#5
Instructor
Cadmium will outlast Zinc - but it is getting harder to find places that will do Cadmium for environmental reasons. There are some new zinc nickel derivatives that are reputed to be extremely durable.
05-09-2011, 11:37 PM
#6
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Zinc reacts 'nicely' with almost all detergent cleaners. Use a nice mild pH-neutral detergent like Simple Green, Dawn, P21S, and it will last a while. Use Orange Cleaners, Purple Degreasers, stuff like that, and the zinc will quickly react to protect the underlying metal. Solvent cleaners no problem.
The cad plating also reacts to the same materials, but the reaction isn't as apparent. The yellow zinc layr seems to be sacrificed pretty quickly and the remaining zinc (grey) is there but not as pretty.
These are my casual observations.
The cad plating also reacts to the same materials, but the reaction isn't as apparent. The yellow zinc layr seems to be sacrificed pretty quickly and the remaining zinc (grey) is there but not as pretty.
These are my casual observations.
05-09-2011, 11:43 PM
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FWIW, I failed big time trying to go black oxide on some parts.
It worked a little on the cross brace bolts (stolen from post #88 in the rather lengthy thread "Yet another top-end refresh (WAS: Trying to fix irregular/poor idle ...)"):
Before:
After cleaning and polishing:
After black oxide process (using Caswell black oxide concentrate, oil, etc.):
But it failed miserably on the cam cover bolts (no photos; too embarassing). I probably didn't get enough of the original plating off (which probably wasn't a bad thing in retrospect since what follows wound up being a much better solution than black oxide).
I realize you were asking about plating... but... what did work on them (and some of the intake hardware) was spray paint: engine primer and engine black. I was really happy with the results on those. Here are some examples stolen from post #79 and post #89 in the rather lengthy thread "Yet another top-end refresh (WAS: Trying to fix irregular/poor idle ...)":
Turned out quite well:
Regarding powder coating, you probably saw it, but in case you didn't:
"Powder coating intake/cam covers/etc. best practices (for the zillionth time!)"
Finally, there's still a lot of hardware I'd like to "make pretty" one way or another, so I'll be watching this thread. There's definitely a lot of stuff that needs cleaning, polishing, and plating.
It worked a little on the cross brace bolts (stolen from post #88 in the rather lengthy thread "Yet another top-end refresh (WAS: Trying to fix irregular/poor idle ...)"):
Before:
After cleaning and polishing:
After black oxide process (using Caswell black oxide concentrate, oil, etc.):
But it failed miserably on the cam cover bolts (no photos; too embarassing). I probably didn't get enough of the original plating off (which probably wasn't a bad thing in retrospect since what follows wound up being a much better solution than black oxide).
I realize you were asking about plating... but... what did work on them (and some of the intake hardware) was spray paint: engine primer and engine black. I was really happy with the results on those. Here are some examples stolen from post #79 and post #89 in the rather lengthy thread "Yet another top-end refresh (WAS: Trying to fix irregular/poor idle ...)":
Turned out quite well:
Regarding powder coating, you probably saw it, but in case you didn't:
"Powder coating intake/cam covers/etc. best practices (for the zillionth time!)"
Finally, there's still a lot of hardware I'd like to "make pretty" one way or another, so I'll be watching this thread. There's definitely a lot of stuff that needs cleaning, polishing, and plating.
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05-10-2011, 12:22 AM
#8
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That SOB bout got my *** whipped, and whipped by a bunch of girls at a titty bar that I USED to frequent when I was younger, appears he went in as me and caused bit of a problem, said something about my birthday present.
What a buddy I tell ya.
What a buddy I tell ya.
The 928 has zinc chromate stuff. Modern Porsches are different because of enviro-bullying. No more ZC harware.
Black oxide can be hard to have done around here reasonably. I recommend keeping some Tool Black on hand for blackening odds and ends. It gives it some good rust protection and is better for hardware than painting.
BTW, I have a friend that does powdercoating. If you want to drop some parts off but don't have time to chat, just pretend you're the uncle Mitch character again;-)
Black oxide can be hard to have done around here reasonably. I recommend keeping some Tool Black on hand for blackening odds and ends. It gives it some good rust protection and is better for hardware than painting.
BTW, I have a friend that does powdercoating. If you want to drop some parts off but don't have time to chat, just pretend you're the uncle Mitch character again;-)
