Marinium...that brings back some memories. I had almost forgotten about it. Marinium is nothing new. Marinium is a type of alloy composed mostly of aluminum
....no sort of great breakthrough in alloys. I know it has been around since at least 1975 when my boat was built.
I have an aluminum
boat that originally came with Marinium cleats. I busted three out of eight cleats in a matter of a few years after I started skippering the boat. I changed out all my cleats with stainless steel
cleats before someone got killed by one springing back in their face. I electrically isolated the SS cleats of course.
In my own personal experience, I would avoid Marinium, at least for anything that bears a load or for anything where life or safety
depends on it not failing.
BTW, Isn't Perko that company that sells chrome plated zinc fasteners whose chrome plating only lasts for about a year in a salt water environment
? Its probably best to leave zinc for sacrificial anodes and nothing else onboard a boat.