Powder Coating
- Thread starter meekers
- Start date
Rust oleum hard hat satin black in an aerosol is ideal for stuff like that. It's miles better than normal aerosol paint, goes on really well if you warm up the metal slightly first.
https://www.cromwell.co.uk/shop/lub...&istBid=tztt&gclid=CKiijfuw-tMCFU--7Qod0C4K-Q
https://www.cromwell.co.uk/shop/lub...&istBid=tztt&gclid=CKiijfuw-tMCFU--7Qod0C4K-Q
I think powder coating's great, I find it much easier and more durable than (my) painting. It works out cheaper for me and a better finish too.
Most of my stuff is galvanised first so I linish/sand the snotters and stalactites off before powder coating, the powder coaters use T-wash to treat the galvanised steel ready for the powder.
I had a brain fart a few weeks ago and got a school gate coated the wrong colour, I only realised when I turned up to dig the posts in and saw it didn't match the existing fence!
I made a phone call and the coaters had the oven door open and the right colour blue in the gun waiting for me- I got the posts in later that afternoon
I hate painting stuff, powder coating for me every time!
Pic 1 - wrong blue
Pic 2 - right blue
Most of my stuff is galvanised first so I linish/sand the snotters and stalactites off before powder coating, the powder coaters use T-wash to treat the galvanised steel ready for the powder.
I had a brain fart a few weeks ago and got a school gate coated the wrong colour, I only realised when I turned up to dig the posts in and saw it didn't match the existing fence!
I made a phone call and the coaters had the oven door open and the right colour blue in the gun waiting for me- I got the posts in later that afternoon
I hate painting stuff, powder coating for me every time!
Pic 1 - wrong blue
Pic 2 - right blue
Courier
Member
- Location
- M62 - M1 - M18 triangle
And if you leave it as it is gonna outlast the tractor.
As said beforehand an aerosol spray coat or three will be perfectly acceptable.
No, never had any problems but then I make/install it and rarely see it for a few years until the lock barrel wears out and needs changing. By that time it's out of warranty if I haven't had any phone calls in the mean time
Thank goodness you have decided to spray paint it yourself and save the money! I like things right in the cab but sending it to be powder coated........! I usually use hammerite black(sometimes satin black) which does a fantastic job and so quick and easy in a spray can. Feck the paint brush.
Forgive me, but I find it odd that you have to galvanise the steel. Surely the powder coating should be capable of doing all the protection required?As the galvanising would last for years on its own , it leads me to believe that its main function in this case is to glue the powder coat on!No, never had any problems but then I make/install it and rarely see it for a few years until the lock barrel wears out and needs changing. By that time it's out of warranty if I haven't had any phone calls in the mean time
Steevo
Member
- Location
- Gloucestershire
Grassman
Member
- Location
- Derbyshire
Aldi actually do some really good spray paint aerosols. Can be sprayed on bare metal.
Cheap as well!
Cheap as well!
- Location
- Lincolnshire
I think powder coating's great, I find it much easier and more durable than (my) painting. It works out cheaper for me and a better finish too.
Most of my stuff is galvanised first so I linish/sand the snotters and stalactites off before powder coating, the powder coaters use T-wash to treat the galvanised steel ready for the powder.
I had a brain fart a few weeks ago and got a school gate coated the wrong colour, I only realised when I turned up to dig the posts in and saw it didn't match the existing fence!
I made a phone call and the coaters had the oven door open and the right colour blue in the gun waiting for me- I got the posts in later that afternoon
I hate painting stuff, powder coating for me every time!
Pic 1 - wrong blue
Pic 2 - right blueView attachment 520586 View attachment 520590
So they can powder coat over a powder coat and galvanise but not a good primer?
As Steevo said the zinc is for corrosion protection and the powder coating gives it the colour, it's just a standard specification that my customers expect.
The powder doesn't naturally stick well to a galvanised finish which is another reason for linishing and T-washing it although I've also just pre baked some intricate pieces that I couldn't linish with good results.
During the process the powder needs to be baked at 180 C for 10 minutes and I like to use companies with a box oven rather than an automated line, in a box oven that time and temperature will be achieved automatically and consistently throughout the oven. On an automated track system there's potential for inconsistent temperatures and maybe a temptation to speed the line up to get work through quicker
Don't know about coating over paint but they can definitely coat over a previous powder colour. The mesh on that gate comes in standard colours and is re coated. The quality of the spray gun counts, a decent gun will give strong electrostatic adhesion which makes the powder stick to the job before it's baked, use a crap gun and the powder won't stick as well.
On that gate job the mesh had got a coat of zinc and three coats of powder by the time it was installed!
ECA
Member
Powder coating can't be applied over paint...at least that's what my local guy tells me. He will shot blast any steel that comes into his place as a prep before powdercoating. He also gives any galvanised steel a light blast to give it an abrasion...supposedly prevents flaking of the powdercoat in time...
Forever Fendt
Member
- Location
- Derbyshire
most machinery now i think has poor paint work due to laser cut parts with very square sharp corners and paint is very thin on these corners ,like spraying a knife edge
RagnarHairybreeks
Member
- Location
- Gloucester
The reason you can't powder coat over primer (well) is that powder coat uses an electrostatic charge to attract the powder to the metal before melting the powder in the oven to make the coating. The primer will be an insulator (electrical) layer preventing the powder from sticking to the metal.
At least until recently, powder coats have been susceptible to degredation in UV which is why, whilst they are great for things like motorcycle frames where they are mostly in the shade, they haven't worked so well on things that get a lot of sunshine.
As far as corrosion protection is concerned then they are a barrier only. As others have said, if the coating is damaged through chipping or dragging then water will get underneath it and it's game over.
Galvanising or thermal spray are the way to go. Paint over it if you want it pretty.
At least until recently, powder coats have been susceptible to degredation in UV which is why, whilst they are great for things like motorcycle frames where they are mostly in the shade, they haven't worked so well on things that get a lot of sunshine.
As far as corrosion protection is concerned then they are a barrier only. As others have said, if the coating is damaged through chipping or dragging then water will get underneath it and it's game over.
Galvanising or thermal spray are the way to go. Paint over it if you want it pretty.