how to know ferrous metal

LoveCoke

Are the hinges and bolt on a garden garden gate ferrous or non ferrous metal.? I think it is galavanised?

i need to know for painting them. The paint says one of them needs primer

landcrzr

If it has been galvanised, it obviously needed some corrosion protection. I'd expect them to be steel, I've never heard of galvanising any other metal for that type of application.
If they are galvanised, ideally they need to be cleaned well and will need an etch primer before primer and top coat. It's not a bad idea to leave galvanised metal exposed for a period (up to a year) before painting to prevent lamination issues.

LoveCoke

landcrzr wrote: »

If it has been galvanised, it obviously needed some corrosion protection. I'd expect them to be steel, I've never heard of galvanising any other metal for that type of application.
If they are galvanised, ideally they need to be cleaned well and will need an etch primer before primer and top coat. It's not a bad idea to leave galvanised metal exposed for a period (up to a year) before painting to prevent lamination issues.

Ok so it s a non ferrous? what is lamination?

the tins says primer needed on non ferrous

landcrzr

Non ferrous means the metal does not contain iron. Steel does contain iron and is a ferrous metal. If your hinges are galvanised, they are likely steel but the galvanising is most likely a zinc compound, this is non ferrous.
Lamination of paint on galvanised steel can occur because the paint does not adhere to the galvanised surface. To help with this, the galvanised surface needs to be cleaned well or left to weather over time and an etch primer should be used first before any other paint is applied.
If your hinges are galvanised, why bother painting them?

LoveCoke

landcrzr wrote: »

Non ferrous means the metal does not contain iron. Steel does contain iron and is a ferrous metal. If your hinges are galvanised, they are likely steel but the galvanising is most likely a zinc compound, this is non ferrous.
Lamination of paint on galvanised steel can occur because the paint does not adhere to the galvanised surface. To help with this, the galvanised surface needs to be cleaned well or left to weather over time and an etch primer should be used first before any other paint is applied.
If your hinges are galvanised, why bother painting them?

i went over a bit when painted fence

Could you tell for sure with a pic?

Non ferrous means the metal does not contain iron. Steel does contain iron and is a ferrous metal. If your hinges are galvanised, they are likely steel but the galvanising is most likely a zinc compound, this is non ferrous.

i am still confused. Does that mean it needs a primer?
the tin says primer needed on non ferrous

Cogsy88

LoveCoke wrote: »

Are the hinges and bolt on a garden garden gate ferrous or non ferrous metal.? I think it is galavanised?

i need to know for painting them. The paint says one of them needs primer

Ferrous metals contain iron and non ferrous don't. As a previous poster already said its galvinised so it needs protection. Id say it galvinised steel which is a ferrous metal but has a protective zinc coating. Primer is required for galvinised metals.

LoveCoke

Cogsy88 wrote: »

Ferrous metals contain iron and non ferrous don't. As a previous poster already said its galvinised so it needs protection. Id say it galvinised steel which is a ferrous metal but has a protective zinc coating. Primer is required for galvinised metals.

Id say it galvinised steel which is a ferrous metal

It is non ferrous that needs the primer according to the can. so is it the zinc coating that needs the primer

Thanks i am really confused with all this

Cogsy88

LoveCoke wrote: »

It is non ferrous that needs the primer according to the can. so is it the zinc coating that needs the primer

Thanks i am really confused with all this

Is it rusty. If it not rusty and it's galvinised what's the need 4 paint.

LoveCoke

Cogsy88 wrote: »

Is it rusty. If it not rusty and it's galvinised what's the need 4 paint.

the bolt is but the hinges are not

Cogsy88

If u want to paint, remove rust with a wire brush Then lightly arable surface with 80 or 100 grit sand paper followed by two coats of lowe rust primer then paint. Hammerite make a special straight to galvinised paint mite be worth looking into as then there's no need to prime. Or you could just buy a new bolt lock for the door mite be cheaper then all the paint. Hope that helps.

LoveCoke

Cogsy88 wrote: »

If u want to paint, remove rust with a wire brush Then lightly arable surface with 80 or 100 grit sand paper followed by two coats of lowe rust primer then paint. Hammerite make a special straight to galvinised paint mite be worth looking into as then there's no need to prime. Or you could just buy a new bolt lock for the door mite be cheaper then all the paint. Hope that helps.

thanks universal rust primer it says on tin. i will look into the hammerite one:)