passivate carbon steel & salt water

[simonfraser]

how resistant is this internally in a dry motor boat ?

there will be some occasional salt water spray as it is near a hatch.

part is cheap enough to replace after a few years.

 

[vyv_cox]

I don't think it is possible to passivate carbon steel. Rust is not passive, so offers no protection from rusting.

 

[rogerthebodger]

As Vyv says you cannot passivate carbon steel.

The main ways to protect carbon steel from rusting , Galvanizing, Plating, Zinc, Tin, Cadmium, copper and several types metals.

Powder coating or painting are the other ways.

I have had carbon steel zinc plated then passivated with a colour black but that is the zinc that is passivated not the steel under the zinc.

 

[simonfraser]

tnx guys, so that is going to rust big time ....

 

[PaulRainbow]

If this is for your hatch Simon, would one of these do the job ?

http://timage.eu/marine/telescopic-adjusters-door-stays/106-4077spring.html

You open the hatch and the spring straightens out and holds it open, when you want to close it, you bend the spring.

 

[simonfraser]

If this is for your hatch Simon, would one of these do the job ?

http://timage.eu/marine/telescopic-adjusters-door-stays/106-4077spring.html

You open the hatch and the spring straightens out and holds it open, when you want to close it, you bend the spring.

tnx paul, yes for the hatch, i have those springs all over the boat for smaller lids, don't want the hatch on my head / fingas in case i push one with my body getting in / out

so found some other sturdy ones, steel might not be suitable, but i can fit those without adding more holes, will see how they last.

 

[rogerthebodger]

This is the kind of hatch stay I have fitted to my home made hatched.

 

[simonfraser]

tnx, yeh that would work but its unlikely to hold the hatch unless done up after its up
the current one has some sort of constant resistance internally and does not need adjusting in resistance up or down
it is however heavily corroded and getting somewhat fragile

this happens to fit on the existing mounts, cheap, if / when it rusts i'll think again, does not seem to be made in SS
https://uk.rs-online.com/web/p/products/8473116/