Painting Galvanised Steel Brackets

[self builder 123]

Hi

I have had steel brackets recently galvanised and now plan to paint them.

What is the best way to do this ? I planned to use a Hammerite primer for galvanised coatings followed by a Hammerite Smooth Coat.

Any advice / experience would be welcome.

 

[Robbie uk]

New galavanising should really have a coat of Mordant mixture on it first prior to primer coat , or Calcium plumbate.

 

[jondecs]

Agree with robbie, Though I have found the zinnser 123 works on galvanising.

good luck

 

[self builder 123]

Gents

Does the Calcium Plumbate affect the galvanising coating ?

Cheers

 

[Robbie uk]

Unless the galvanising has aged in the weather for about 12 months it will try and throw any paint off that is applied. If you use the Mordant mixture or calcium plumbate, thye are etch primers which will not affect the protecting properties of the galvanising but allow subsequent coats of paint to be applied without them coming off.

 

[Zampa]

T Wash..isnt tha the stuff that sends it black first?..thats good

Can you still get Plumbate?..I thought Zinc Phosphate took over from it years back..

I have odne farrrr to much of that as an apprentice to ever want to see the poxy stuff ever again!!!

 

[jondecs]

T Wash..isnt tha the stuff that sends it black first?..thats good

Can you still get Plumbate?..I thought Zinc Phosphate took over from it years back..

I have odne farrrr to much of that as an apprentice to ever want to see the poxy stuff ever again!!!

Yeah calcium plumbate duhh, remember as a boy on top shift, 13th floor, wiping and scraping ice off before plumbatin poxy crittal windows. Just why they didn't coat em in factory I nver found out Happy daze lol

 

[jondecs]

One of the blocks I worked on circia 67, This is what happens when you plumbate on galvanised windows on a freeezin february day pmsl.

http://www.youtube.com/watch?v=G8DoSvCDsIg

 

[Zampa]

That dont say much for your painting Jon...apparently the building had to be demilished because the windows were all rusting and it caused a structural weakness beyond repair!! lol

I have had some of that though...back in 79..in a garage under a block of lats..in near darness, degreasing them with turps drying them and plumbating..

Is it something about plumbate that it has to be applied in freezing condititions in near darness by apprentices only??????????