1/2 full frame corrosion prevention

[outbackjack]

how best to prevent galvanic reaction on full frame/ half frame reel with either full aluminum  or composite frame with brass inserts ?

[Keta]

One should always grease screws.

[jurelometer]

I see this is your first post.  Welcome!

The only method available for this situation is to provide a non-conductive barrier between the parts.  Folk here typically use the same grease that they are already using for the reels mechanical innards, as Lee (Keta) noted.  There are products that are designed  explicitly  for corrosion prevention that is better and sticking where you put it, but these are generally not useful as lubricants.

It might be worth noting that situations with a large anode to cathode ratio (like large aluminum frames and plates with small stainless screws) have slower galvanic corrosion, so greasing might be sufficient.

We also have to be concerned about crevice corrosion and sub surface corrosion. Places where a bit of salt and moisture might get past the anodizing, but there is not enough access to the surrounding air to allow the aluminum to form a fresh oxide layer.  This is source of a lot of really nasty corrosion  on saltwater reels.  It is worthwhile to also ensure any touching surfaces (e.g., frame to sideplate, packed braided line to spool walls) are also coated to prevent saltwater from  reaching these vulnerable surfaces.  Some folk here also coat the spool surfaces with grease, but most use a couple layers of car wax (I use  carnauba paste wax).

And while some here believe that touch-up paint on scratches on aluminum reel parts helps prevent corrosion, I am in the camp that believes it just creates another oxygen deprived environment underneath the paint for sub-surface corrosion to occur. Plain old scratched up 6061 aluminum may not be pretty, but it is reasonably corrosion resistant.  I have several badly scratched up reels that are doing just fine after many years of use.  Just flush or soak regularly with warm fresh water.

 -J

[Keta]

I am in the camp that believes it just creates another oxygen deprived environment underneath the paint for sub-surface corrosion to occur.

Yup, same for stainless steel.   

[alantani]

welcome!!!

[Keta]

D'oh!!! 

Hi, welcome to our assilum.

[Brewcrafter]

Welocme from Southern California - john