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I thought of that but it comes down to selecting the lesser of evils. The pu=
re rust I found in the rails was extensive for a 9 year old truck. The quest=
ion is whether the galvanic corrosion would be worse. =46rom the appearance o=
f what I found on the truck it's hard to imagine worse.
Sent from my iPhone
> On Aug 3, 2016, at 11:13 AM, John Innis <jdinnis@gmail.com> wrote:
>=20
> Aluminum rivets in steel are a bad idea. Unless something is done to perm=
anently coat the surfaces where the tow materials interface, there will be g=
alvanic corrosion. Just encapsulating the completed joint is not sufficient=
, you have to make sure that the expanded portion of the rivet in the hole n=
ever touches the steel base material. I have seen this done with highly spe=
cialized rivets with some sort of interface collar, but I don't think plain a=
ircraft aluminum rivets will work.
>=20
>> On Thu, Jul 28, 2016 at 5:27 PM, Jim Juhas <james.f.juhas@snet.net> wrote=
:
>> I am replacing the support rails for the bed of my 2007 F250. (I thought=
about a bed replacement but it seems the rails are the only rotten parts. N=
O RUST in the fender wells!)
>>=20
>> Once the old rails are removed, my plan was to rosette-weld in the new on=
es. But, I have the ability to use aircraft rivets, probably 3/16" size. I=
f I do this, I can seal the entire junction with silicone, as I've done in m=
y FFR Roadster. Welding will leave a place for corrosion, but would the expo=
sure be better or worse with the dissimilar metal of the rivets, aluminum v.=
steel?
>> _______________________________________________
>>=20
>> Shop-talk@autox.team.net
>> Donate: http://www.team.net/donate.html
>> Suggested annual donation $12.96
>> Archive: http://www.team.net/archive
>> Forums: http://www.team.net/forums
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/shop-talk/jdinn=
is@gmail.com
>=20
>=20
>=20
> --=20
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D
> =3D Never offend people with style when you =3D
> =3D can offend with substance --- Sam Brown =3D
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div>I thought of that but it comes down to=
selecting the lesser of evils. The pure rust I found in the rails was exten=
sive for a 9 year old truck. The question is whether the galvanic corrosion w=
ould be worse. =46rom the appearance of what I found on the truck it's hard t=
o imagine worse.<br><br>Sent from my iPhone</div><div><br>On Aug 3, 2016, at=
11:13 AM, John Innis <<a href=3D"mailto:jdinnis@gmail.com";>jdinnis@gmail=
.com</a>> wrote:<br><br></div><blockquote type=3D"cite"><div><div dir=3D"=
ltr">Aluminum rivets in steel are a bad idea. Unless something is done=
to permanently coat the surfaces where the tow materials interface, there w=
ill be galvanic corrosion. Just encapsulating the completed joint is n=
ot sufficient, you have to make sure that the expanded portion of the rivet i=
n the hole never touches the steel base material. I have seen this don=
e with highly specialized rivets with some sort of interface collar, but I d=
on't think plain aircraft aluminum rivets will work.<br></div><div class=3D"=
gmail_extra"><br><div class=3D"gmail_quote">On Thu, Jul 28, 2016 at 5:27 PM,=
Jim Juhas <span dir=3D"ltr"><<a href=3D"mailto:james.f.juhas@snet.net"; t=
arget=3D"_blank">james.f.juhas@snet.net</a>></span> wrote:<br><blockquote=
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid=
;padding-left:1ex">I am replacing the support rails for the bed of my 2007 F2=
50. (I thought about a bed replacement but it seems the rails are the o=
nly rotten parts. NO RUST in the fender wells!)<br>
<br>
Once the old rails are removed, my plan was to rosette-weld in the new ones.=
But, I have the ability to use aircraft rivets, probably 3/16" size.&=
nbsp; If I do this, I can seal the entire junction with silicone, as I've do=
ne in my FFR Roadster. Welding will leave a place for corrosion, but would t=
he exposure be better or worse with the dissimilar metal of the rivets, alum=
inum v. steel?<br>
_______________________________________________<br>
<br>
<a href=3D"mailto:Shop-talk@autox.team.net"; target=3D"_blank">Shop-talk@auto=
x.team.net</a><br>
t=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/archive"; rel=3D"noreferrer" target=3D=
"_blank">http://www.team.net/archive</a><br>
Forums: <a href=3D"http://www.team.net/forums"; rel=3D"noreferrer" target=3D"=
_blank">http://www.team.net/forums</a><br>
lk/jdinnis@gmail.com" rel=3D"noreferrer" target=3D"_blank">http://autox.team=
.net/mailman/options/shop-talk/jdinnis@gmail.com</a><br>
<br>
</blockquote></div><br><br clear=3D"all"><br>-- <br><div class=3D"gmail_sign=
ature" data-smartmail=3D"gmail_signature">=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>=3D Never=
offend people with style when you =3D<br>=3D can offend with su=
bstance --- Sam Brown =3D<br>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div>
</div>
</div></blockquote></body></html>=
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_______________________________________________
Shop-talk@autox.team.net
Archive: http://www.team.net/archive
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