I dont know. I just know the trouble I've had first hand. Currently, I have an external radiator on my tank, faced away from me, so that it could fail first and give me visible warning of trouble. My tank is stainless steel and much stronger than the radiator.
I dont actually use the radiator, except as a "component in position" to be sure my water tank is not considered streamlining, during "open" class runs.
I should tell you, when the turbo car torched through and expanded the water tank, I found the timing belt back-side rubber (where the water pump ran) melted onto the water pump pulley. The water pump was not seized or damaged, but I think the engine was blowing water out every way it could and stopped or reverse spun that water pump.
It was such a violent steam event that it melted through the timing cover and cut the back seal out of the timing belt idler pulley, like a water jet would. There was no sign of smoke damage outside the engine, just things cut and melted.
I dont cotton to putting jet engines on the intake side of my engines, these days.
Anyway, my opinion is that whatever you use will be subject to saltwater no matter how careful everyone is. It will get oil in it, and fuel, and scale, and more surprises. I just make them simple and throw them away when I find trouble.
Regards, JimL