Jack Carson:
Sermetel(TM) and Rockhard(TM) coatings were both used at one point on Mg. From what little I know, Rockhard seems to have become the coating of choice. The company (parent company UK based) have a lot of different coating flavors and sealants, one of which is used on the Mg alloys in Sikorsky gear boxes based on a Sikorsky driven spec.
Rockhard clear stoving enamel protection magnesium aluminium (aluninum)
The real key to protection, in my opinion, is vigilance in the field and aggressive touch up.
Furia: I don't see V-22 as a C-130 replacement, but I appreciate your perspective. With USCG, however, traditionally cost has been a huge factor in any procurement. Osprey is very pricey.
Maybe as it matures USCG might find a niche for it.
If the cost comes down.
SASless:
Grrrr. Must get up on soap box here.
As the Air Force and Navy operate Blackhawks....there should be some commonality between the standards it would seem.
No, the US Navy does not operate Blackhawks.
They operate Seahawks.
(Yes it's an S-70 variant ... but ...)