Outdoor powder coating peeling

[Pocster]

I’ve got a touch up pen for the odd chip etc but as you can see the black coating ( I assume powder coating ) is peeling off .

Can I prevent this ? Fix it ?

Edited February 18 by Pocster

[Pocster]

[JohnMo]

Smallest defect in powder coat and it's rubbish. Water gets in and corrosion starts unseen, by the time peeling starts it's too late.

 

Strip back as far as you can and paint, you may need a plastic primer on powder coat so it sticks.

[Pocster]

  On 18/02/2025 at 13:23, JohnMo said:

Smallest defect in powder coat and it's rubbish. Water gets in and corrosion starts unseen, by the time peeling starts it's too late.

 

Strip back as far as you can and paint, you may need a plastic primer on powder coat so it sticks.

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Plastic primer ?

Not a steel primer then paint ??

 

Or do you mean plastic primer over existing ( edge ) of flaked coating , then paint the lot ?

Edited February 18 by Pocster

[JohnMo]

  On 18/02/2025 at 13:34, Pocster said:

Or do you mean plastic primer over existing ( edge ) of flaked coating , then paint the lot ?

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Plastic primer on any existing powder coat that doesn't come off. Then paint the lot.

[Tom]

That looks galvanised no? Might need an etch primer on the zinc IIRC. 

[Pocster]

  On 18/02/2025 at 14:24, Tom said:

That looks galvanised no? Might need an etch primer on the zinc IIRC. 

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No idea . Is there a definite way to tell ?

[Tom]

  On 18/02/2025 at 14:36, Pocster said:

No idea . Is there a definite way to tell ?

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If it's silver with a bit of white powder on it (which it looks like it is) then it's highly likely to be galvanised. Unprotected mild steel would be covered in rust. Looks like the powder coat was just a cosmetic thing rather than to protect the metal, which, as above, rarely lasts long anyway. Galvanised you'll be good for years!

 

[Pocster]

  On 18/02/2025 at 15:08, Tom said:

If it's silver with a bit of white powder on it (which it looks like it is) then it's highly likely to be galvanised. Unprotected mild steel would be covered in rust. Looks like the powder coat was just a cosmetic thing rather than to protect the metal, which, as above, rarely lasts long anyway. Galvanised you'll be good for years!

 

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So spray with etch primer then paint ? ( which type of paint ? )

[Tom]

  On 18/02/2025 at 15:10, Pocster said:

So spray with etch primer then paint ? ( which type of paint ? )

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I guess so. Not sure what paint tbh, I'd normally say something oil based that needs highly toxic chemicals to clean the brush after, good old fashioned stuff. However, seems most paints these days are water based and less toxic, disappointingly.

 

Why not just scrape off the powder coating though and bask in the majesty of the galvanising? 

[Pocster]

  On 18/02/2025 at 15:50, Tom said:

Why not just scrape off the powder coating though and bask in the majesty of the galvanising? 

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What all 15 steps ? 🤔🙄🤣

[Pocster]

Can’t I just use a ronseal / hammerite type paint straight to metal type thing ?

[MikeSharp01]

Is the material magnetic? It looks like oxidised Aluminium to me, so won't be galvanised steel.

[Pocster]

  On 18/02/2025 at 17:35, MikeSharp01 said:

Is the material magnetic? It looks like oxidised Aluminium to me, so won't be galvanised steel.

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Erm , don’t know . Can check …

 

Actually from memory the 1 stair stringer was 150kg so not Ali …? 

Edited February 18 by Pocster