Protecting connections and plugs against corrosion

[basssears]

Originally Posted by boatpoker

Boeshields T9 (developed by Boeing) ... I spray everything metal and electrical .... fuel tanks, engine, shaft, stuffing box, inside of my laptop even open the radar and spray circuit boards, all my tools, absolutely everything.,, never seen any corrosion.

Do you find you have to periodically reapply the Boeshield? That seems to be the one knock I have heard on some of the spray on stuff, wouldn't want to have to go through every connection annually (although probably should)

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[a64pilot]

For the non-electrical and maybe even for that my go to is Corrosion-X.
Then for things like the engine, I like to wash it yearly with warm soapy water and a soft brush, let it dry and re-apply the Corrosion-X.
Boeshield is good, I just think Corrosion-X is better is all.
I've used it on outboards for years, with 0 corrosion problems where it was applied.

On edit, you want the stuff you have to re-apply once a year or so, there are types that dry to a coating that you do not re-apply, but you can't get it off either.
They are very similar to conformal coatings.

[boatpoker]

Originally Posted by basssears

Do you find you have to periodically reapply the Boeshield? That seems to be the one knock I have heard on some of the spray on stuff, wouldn't want to have to go through every connection annually (although probably should)

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We head south to winter in salt water every few years and I do it just before we leave Toronto ..... I think that may be overkill as it still seems to be in good shape

[sartorst]

Not only does die-electric prevent corrosion I think it helps dissipate heat from a pinpoint
contact area it's good to 500 degrees
Voltage and metal and salt water is a bad combination I had a new gps completely corrode the the pins away in a few days because i forgot to put my usual glob of die-electric in the plug

[Siberianhusky]

Corrosion-X works fine with electronics.
I race electric rc boats, we use it on our recievers and speed controls as a "waterproofing".
I use di-electric on the plugs.
Use both on the big boat.

[mtarcher]

Still slightly on topic with the OP, but has anyone found a suitable dielectric that works with plastic MC4 connectors for solar panel wiring?

[a64pilot]

Originally Posted by mtarcher

Still slightly on topic with the OP, but has anyone found a suitable dielectric that works with plastic MC4 connectors for solar panel wiring?

I've never had DC-4 hurt a plastic connector, and I use it on pretty much all my plastic connectors, Radar, Plotter, etc.


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[CaptNemoO2]

Originally Posted by a64pilot

I've never had DC-4 hurt a plastic connector, and I use it on pretty much all my plastic connectors, Radar, Plotter, etc.


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With DC-4, watch out for silicone in connectors. Silicone grease is not compatible with silicone rubber.

But we do use it all over the place at work. It's our go to for anything that needs to be lubricated.

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[Marqus]

My understanding is that:

Corrosion-X stays somewhat wet, but Boeshield T9 dries to a thin waxy surface (easily wiped off with mineral turps).

The active ingredient of Fluid Film seems to be Lanolin.

Very surprising to hear from CaptNemo that "Silicone grease is not compatible with silicone rubber." So if it gets on electrical wires with a silicone rubber sheath, what will happen?

[CaptNemoO2]

Originally Posted by Marqus

Very surprising to hear from CaptNemo that "Silicone grease is not compatible with silicone rubber." So if it gets on electrical wires with a silicone rubber sheath, what will happen?

It's can swell o-rings causing them to tear. I'm not sure of the long term effects on silicone rubber, though Dow Corning says DC-4 will destroy silicone rubber. I've never tested it personally, just going off of the experience passed down to me from the older generation of engineers at work. And since our equipment is never allowed to go down, we tend to stick to what's proven already. I will be experimenting with some silicone sponge rubber this week to come up with some standard repair methods, so if I can find a tube of DC-4, I'll put some on it and get back to you in 6 months!

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[sailormed]

Originally Posted by CaptNemoO2

I will be experimenting with some silicone sponge rubber this week to come up with some standard repair methods, so if I can find a tube of DC-4, I'll put some on it and get back to you in 6 months!

Any news on the resistance of silicone rubber? The 6 months must be over by now .

[CaptNemoO2]

Originally Posted by sailormed

Any news on the resistance of silicone rubber? The 6 months must be over by now .

Yeah, I dropped the ball on that one! That task at work became OBE. The parts I was testing with became necessary to fill a gap in production. But from what I saw, there was limited issue. I think the issue is really with tight fitting parts where swelling can be a concern. In the short time I was playing with it, I didn't notice anything that would make me think it would be a problem with silicone wire insulation.

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