This makes more sense.@BP Addict - Walt, as stated that's somewhat misleading, so if you don't mind me adding a clarification.
The conclusion was from a test of 56 or more preservation solvents/solutions and it was not the basic WD-40 that out-performed them all, but it was their special and expen$ive ($15 for a 6.5-ounce can) "WD-40 Specialist Corrosion Inhibitor" that was tested in long-term salt exposure sprays to be THE BEST of the best, along with a special RIG grease-based product, but the spray is easier to use, of course!
I use that WD-40 SCI on SS hardware and mechanisms on boats, as I maintain a fleet of boats used 24/7 in salt waters, and I can attest that it is THE best I've ever used for a spray or liquid product.
If I need a protectant/preservative grease, I'll use the blue-colored synthetic grease made/sold by or as OMC/Bombardier "Triple Guard" marine grease. That still protects even when compromised 30% with saltwater. In fact, I apply it to my MZL'dr barrels before pinning them in the barrel channel; it is quite thick, needs to be rubbed out to apply a thin coat, but it stays in place and it doesn't run. It's only $12 for a HUGE tub that lasts me many, many years, and I'll take care of over a dozen boats and motors in those years, plus 3 of my own. (Note this product wasn't tested in the large field test noted above.)
View attachment 360198
Note: Like others ... I just clean with good ol' water!
I would bet there’s graphite or maybe Teflon in it.