Stainless or aluminium

[Sean]

I am about to fix my transducer to the hull, should I use aluminium screws/rivets or stainless? its an Aluminium hull. Sean

[Scott15]

Stainless, lots of people put something inbetween the transducer and the hull such as a cut out of a bread board or a pecie of rubber etc

[blaze]

I would use aliminum blind rivets and seal it with sikaflexs
cheers
blaze

[Biff]

stainless. you can get an anti-corrosive joining compound called duralac. it inhibits electrolytic corrosion between dissimilar metals

Biff ;)

[waykel]

Heavy gauge blind aluminium rivets, sikaflex and thin rubber seal. ;)

[blaze]

why would you recomend putting dissimular metals together when there is no need, a blind rivet is easy to remove with a drill the same size as the original hole where a stainless screw is going to have some reaction regardless of what protection u use and make it harder to remove.
Where possible always use the same metals to fix/fasten things around bolts cause the minute you add the third element, things have gotta happen
cheers
blaze

[Spaniard_King]

Definately Ally, Blaze is on the money

Stainless will react no matter how good your preperation is, the screw/rivet has to come in contact with the hull at some stage

Garry

[dnej]

Got to go aluminium, but make sure the centre bit, forgotten what its called, is also aluminium,Some are steel.
David

[seatime]

mandrel, think that's the word ur looking 4 dnej. if u use all alloy rivets make them big ones. the alloy mandrels don't pull up as tight as steel.
steel mandrels will be ok with a dab of sikaflex over both ends to seal them.

[MTS_-_fish_magnet]

Use aluminium with an anticorrosion compund so the screws dont "rust" to the body.

Don't use stainless as the aluminium hull will corrode.

[Sean]

thanks guys, alum it is :)