Compatibility of Powder Coating and Galvaniziation 1

[EngEquilibrium]

Hi,

I have a exterior pergola type structure that has both heavy timber and steel elements. The architect would like to powder coat the steel elements instead of galvanizing. The base plates need to be galvanized as they will be buried.

1. Can something be powder coated after it is galvanized? Or are the two processes incompatible? We want to make sure the base plates look the same as the rest of the structure without having to galvanize everything.
2. If I have a galvanized/stainless steel screw connecting the powder coated steel component to the timber components, is it okay for something that is galvanized to be in contact with something that is powder coated? Or will the two coatings/processes damage each other some how?

Thanks!

 

[BrianPetersen]

Automotive bodies (generally containing at least some galvanised panels) are chemically treated and then e-coated before any paint is applied. Chassis components often get the chemical treatment and e-coating without subsequent paint being applied over it.

https://cabinaslagos.com/analyzing-the-automotive-painting-process-in-the-factory/

https://www.pfonline.com/articles/e-coating-zinc-stampings

edit:

http://www.ppgecoat.com/Process/Pretreatment.aspx

 

[dik]

It's generally not a great idea, but can work. It largely depends on the type of soil, its chemistry and the amount of moisture.


So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik