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-   -   Pentrox for bonding antenna (https://vansairforce.net/community/showthread.php?t=143149)

RVDan 10-27-2016 07:04 PM

Quote:

Originally Posted by rv7charlie (Post 1122349)
Is this the product series being discussed?
https://objects.eanixter.com/PD372804.PDF

If so, I don't see any mention of carbon in the description of ingredients. It would seem highly unlikely that there would be, since the point of using it is to prevent corroded joints, and carbon would cause corrosion on aluminum house wiring/products just like aircraft products.

Charlie

That is a different product than I used in the past. You are correct, no graphite- If that is the product being discussed

RV6_flyer 10-27-2016 08:38 PM

Quote:

Originally Posted by Captain_John (Post 1122340)
Gary, what confuses me is your statement about a conductive and non-conductive alodine.

Alodine is a conversion process. The alodine doesn't remain on the aluminum.

All that is left is an aluminum chromate layer which IS conductive. It converts the surface of the aluminum. It doesn't coat it at all.

:cool: CJ

I am extremely familiar with Alodine. Almost all of the Alodine and or Iridite I have use is NON-CONDUCTIVE Class 1A. IF one wants a conductive Alodine, they need to make sure that it is Class 3 so that it will conduct some electricity.

For the average homebuilder, it is better to stay away from Alodine when you want an electrical connection on aluminum. Most homebuilders will not know about Class 1A and Class 3. Alodine 1001 is Class 3 and conductive. Alodine 1201 is Class 1A and non-conductive.

RV6_flyer 10-27-2016 08:42 PM

Quote:

Originally Posted by RVDan (Post 1122365)
That is a different product than I used in the past. You are correct, no graphite- If that is the product being discussed

Penetrox A is the product that I have been using for decades.

jarhead 10-28-2016 04:15 PM

At the last 2 helicopter MROs I worked for, we used Penetrox A and a bead of proseal around the antenna base, for antenna installs where the customer was too cheap to spring for the Av-DEC conductive gaskets.

fl-mike 10-29-2016 11:26 AM

Quote:

Originally Posted by RV6_flyer (Post 1122393)
I am extremely familiar with Alodine. Almost all of the Alodine and or Iridite I have use is NON-CONDUCTIVE Class 1A. IF one wants a conductive Alodine, they need to make sure that it is Class 3 so that it will conduct some electricity.

For the average homebuilder, it is better to stay away from Alodine when you want an electrical connection on aluminum. Most homebuilders will not know about Class 1A and Class 3. Alodine 1001 is Class 3 and conductive. Alodine 1201 is Class 1A and non-conductive.

Gary,
The data I have read indicates that Class 1A is less conductive, but not non-conductive. Class 3 is preferred for applications requiring low-conductivity, but conductivity is proportional to film thickness and class 1A will still be conductive enough for our purposes. All of my samples (Iridite 14-2) are conductive and I would have to break out the milliohm meter to see any appreciable difference between the coated and un-coated condition. If the average builder stays with a light iridescent gold finish, they'll be fine.


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