7 replies to this topic

[darkcat_systems]

Morning all
I'm going to need my sills doing soon, and was thinking that i might get the parts galvanised before i have them attached.

I am aware that welding galvanised parts gives off serious gasses, but if you grind off the coating its fine (as should any good welder) then after welding go over the areas with galvanising spray.

Has this been done? if not, why?? seems like a really good idea to me....

[Broomer]

Im no metallurgist but im pretty sure you can get severe galvanic corrosion when coupling galvanized ( zinc coated ) steel with plain steel.

[blue blood]

Well I know for a fact that getting panels galvanised is a bad idea as if you send them off for coating they will come back looking like Dali pieces for sure due to the thickness of the metal and the heat involved in the process!!! I did look into it for my front subframe but even that can warp badly so I believe a flimsy panel has no hope! That and it adds an extra tonne ;)

Regards Blue

[darkcat_systems]

Oh right... so how do the manage it with dustbins, wheel barrows etc?? theyre pretty thin

Maybe the process you looked into was a bit too industrial??

[northern-cooper]

Oh right... so how do the manage it with dustbins

ours are plastic

[Bungle]

you could make your own from tinned steel

this is a steel panel with a coating of tin over the top to help corrosion

[stoneface]

Yes you could zinc coat steel panels, infact many car manufacturers do. e.g. http://www.volkswage...galvanised-body
The advantage of zinc is that it is sacrafical to the steel underneath. if you scratch through the zinc coating the steel does not rust, instead the zinc coating corodes slowly.
On the other hand Tin plating is not good for protection of steel. If you scratch the surface of tin the steel underneath will rust away leaving the tin plating.
e.g. take a baked bean tin and scatch through the tin plating and leave it outside. Eventually (long time) you will find that although the can still looks ok, when you pick it up it will crumble away as the steel underneath has rusted away.

[charliedurrant]

Sub frames can be galvanised but body panels will become floppy in the molten zinc. Zinc electro plating is an alternative for thin metal but before painting the surface need to be degassed to prevent pin prick bubbles appearing.

Charlie