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Old 04-01-2004, 11:55 PM   #1
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Default Screwed-UP

I just bought a Yoke MRTC-SD SSG and bought the titanium screw set and read somewhere recently that a galvanic action (a sort of chemical reaction that induces welding of the two materials together) happens. There is a few aluminum parts with this kit and I bought a few more. Should I just avoid using the ti-screws when going into the alum. parts and use the stock screws?

PLEASE.....help a brother out
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Old 04-02-2004, 12:44 AM   #2
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Only could happen when there's identical materials eg Ti screw into Ti component, or Al into Al. The 2 components could "weld" themselves together.

You avoid it by putting a barrier between them, like grease or threadlock.

Ti into Al should be ok.

(If its a screw into-metal that doesn't need taking out regularly, I'd threadlock it anyway... )
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Old 04-02-2004, 04:36 AM   #3
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i wouldnt worry about any galvanic corrosion unless you plan on putting pontoons on your car and using it as a boat. but you are right-disssimilar metals will react quicker(under the right circumstances) one metal becomes the "cathode" (titanium,because its harder) and the other(aluminum) becomes an "anode" and will begin to pit and corrode.but again unless you race you car under salt water it wont happen. oh and BTW thread lock is a corrosive and damages aluminum
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Old 04-02-2004, 05:07 AM   #4
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JayBee where did you get the Titanium screw kit? Do they have kits for other cars also?
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Old 04-02-2004, 07:00 AM   #5
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Default Tt-sets

whew, thanks for the info guys.
I got mine from ultimatehobbies.com, you won't be able to order it via the net so call them.
speedtech.com or precisionrc.com also has them. Any problems with these sites, give me a holler.

again thanks guys and good looking out with the threadlock thing.

oh, almost forgot, when starting to thread your turnbuckles should i use dishwashing liquid or lightweight oil to make things a little easier?
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Old 04-02-2004, 07:33 AM   #6
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You'll still see the welding action from Ti to AL. I suggest you put a bit of grease on the screws before you assemble. It would suck to loose the screw and bulkheads if this happens!

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Old 04-02-2004, 09:54 AM   #7
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Default Re: Tt-sets

Quote:
Originally posted by JayBee
when starting to thread your turnbuckles should i use dishwashing liquid or lightweight oil to make things a little easier?
try candle wax, lot less messy.
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Old 04-02-2004, 09:59 AM   #8
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Quote:
Originally posted by sean
BTW thread lock is a corrosive and damages aluminum
There are 101 types of threadlock, even Loctite has dozen different types...

I use Tamiya's Threadlock (its a solvent glue) and also Loctite or Permatex anaerobic products (which cure only when there's no air).

Do not buy "permanent" threadlocks nor the etching types too.


Some silicone sealant is also corrosive (acidic), try to use only "neutral cure" type RTVs.
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