Corrosive inhibiting anti freeze

[Flat Water]

First things first- In what non-closed systems do you want to use an antifreeze for winterization.

Second, is there any product on the market that can be used to coat internal parts with a non-toxic, non-corrosive film instead of the drain-purge-backfill (with antifreeze) process described in other threads?

Third, on a typical 25-30 foot boat with a head and an I/O how many areas/systems need to be drained and treated?

Finally, besides corrosion, what are the other consequences of draining out raw water systems and not treating them with antifreeze?

 

[schnuk42]

FW
1st-If by N-C systems you mean engine, outdrive(I/O) and AC if equiped, then those are the systems to use RV or low tox antifreeze with rust inhibitors.

2nd-None that I know of.

3rd-Fresh water system including water heater, if equiped, shower sump, drains on sinks, AC system if equiped, all bilges. Ice maker if equipped.

Fini-The backflushing of the systems, in my opinion, assures the displacement of water in that system with a liquid that freezes at a lower temperature. i.e insurance.

Hope this helps,
Just another Schnuk

 

[Flat Water]

42
Non-closed would be anything but the engine. In my case with a runabout, raw water cooling, sump, pressurized wash down system and the beer cooler

I know that there are engine oils that leave a film of teflon, moly or other slick/sticky films so it seemed logical that there was a formulation for open systems like raw water cooling, ect. In the event something like this did exist, back flushing would get the film established and back filling wouldn't be needed. What you're saying is that to be sure, back filling is necessary.

Maybe someone with a Chemical engineering degree will read this, whip something non-toxic up and get rich.