Thread: Wing top checker plate and plastic vents

Originally Posted by ProjectDirector

Thanks for heads up and avoiding disaster.
How readily available are these cadmium plated rivnuts?
I will also need the same in standard rivets as I am doing the sills.

Zinc will be absolutely fine...

Want to take it to the next level? Aluminium Rivnuts

300 Piece Aluminium AND Steel Rivnut SET Nutsert Rivnuts | eBay

QTY 20 Aluminium Large Flange M6 Splined Nutsert Rivnut Nutserts RIV NUT Grip A | eBay

For the Sills: Just use an alloy rivet

Originally Posted by Tombie

Zinc will be absolutely fine...

Want to take it to the next level? Aluminium Rivnuts

300 Piece Aluminium AND Steel Rivnut SET Nutsert Rivnuts | eBay

QTY 20 Aluminium Large Flange M6 Splined Nutsert Rivnut Nutserts RIV NUT Grip A | eBay

For the Sills: Just use an alloy rivet

Many thanks

Looking over the galvanic reaction tables, I can see that stainless is a strong cathode while Al acts as the anode. I recall doing this in high school / university 1000 level chemistry, but have not needed to look over it since.

What's the preferred fastener to use in an Al riv-nut in an Al panel? Mild steel? Using stainless fasteners would just move the problem to a new spot!
I see that most of the potential for corrosion is in flowing sea-water... I'd hope I never meet such a hostile environment in a landy for extended periods of time.
The main idea is to limit the electrolytic potential, am I right?

Sorry I forgot to post photos of the new plates I installed. For the sill plates I just bought some 2 mm checker plates cut the rectangle and painted them.
The 1.5mm rubber gasket is still too thick. I will remove and just silicon around the edges so it doesn't collect crap.
ImageUploadedByTapatalk1435986307.654124.jpgImageUploadedByTapatalk1435986327.537910.jpg

Cheers for the pics,

I ordered the gasket kit for my wing top protectors, as well as a tube of duralac anti corrosion jointing compound. I figure this will assist in preventing any undue corrosion, if at all applicable. The supplied fasteners with the checker plate I got are stainless, however black coated. I've got a number of aluminium riv nuts to suit, for mounting to the panel.
Once I get it all fitted up, I'll see whether I will proceed with any modification to the checker plate to make the vents fit better.

So, trying not to go too far off topic, does that mean if I were to replace the galvanised nuts on the door hinges etc with the stainless steel nuts that can be bought in kits for Defenders, that the stainless and aluminium might react with each other? If so, can that be prevented?

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Yes, dissimilar metal corrosion will occur. But it is most prevalent in moist conditions - Think a marine environment, or in areas on a vehicle which are constantly wet. I didn't want to take any chances, as rain, mud, and other crap will accumulate in the foam backing, and under the wing tops, and will stay more moist that I'd hope.

Duralac will help to prevent this, It's commonly used in marine applications wherte stainless steel and aluminium are in close proximity - mast hardware, fixings to hulls etc. It's a compound with a high amount of chromium, which I assume acts as a sacrificial anode (and hence would deplete over time).

I used zinc plated rivet nuts on the left wing with silicon.
Right wing I just used the black nuts and bolts with silicon.
Where do source duralac from?
I will take off the plates to remove rubber gasket so I can apply some this instead of silicon.