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Hi again,

my 48" mower deck is currently beeing sandblasted (it was sure needing it... see pic). There is some welding work to do on the deflectors and I thought I'd give it a thorough cleaning before I start. When this is done the normal way would be to apply corrosion inhibitor (primer) and a top layer(s) of nice JD-Yellow (RAL 1018). The guy from the sandblasting company however gave me the idea to have it hot-dip galvanized instead of using a primer.
This would of course stop corrosion once and for all but wouldn't the heat cause deformations in the housing?
If anyone of you guys has experience with this topic (hot-dip galvanizing of sheet metal parts) please let me know...

Thanks in advance...

Forget about ever getting paint to ever hold on it and also it will still rust, You are much better doing the job right, primer and paint. On top of it all it will look better.

Hot dipping should not cause mechanical deformation.
However ther is a good reson why top end mowers do not get galvanised and that is cut grass is very acidic so it rips off galvanising in no time flat.
As previously advised, getting paint to adhere to galvanising is a bit tricky and you will need to use aluminium paints.

The absolute best treatment you can give is the full POR 15 treatment which will be 10 times better than the original finish.
However you have to do the complete procedure which is quite complicated or it won't work.
OTOH, you will never ever get any rust on your deck ever again.
The furane undercoat is mechanically indestructible and more abrasion resistant than the steel .
Down side it is not UV stable so you need a good heavy top coat to protect it.
I generallty go 3 to 4 coats