Car trailer centre boarding

[addjunkie]

It shouldnt as the ali isnt in contact with the steel, its just screwed to the boards

 

[bigegg]

It shouldnt as the ali isnt in contact with the steel, its just screwed to the boards

And the steel should be painted, before boarding.

 

[Turbo]

Would using alu on a steel trailer not accelerate corrosion?

The trailer was built 20 years ago & it is still on its original wood, steel & aluminium! It's going to get stripped soon for a badly needed repaint but the wood is still fairly sound.
First I need to get another trailer I was given repaired so I'm not without a functioning trailer.