• Hey Guest!
    British Car Forum has been supporting enthusiasts for over 25 years by providing a great place to share our love for British cars. You can support our efforts by upgrading your membership for less than the dues of most car clubs. There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Upgraded members don't see this banner, nor will you see the Google ads that appear on the site.)
Tips
Tips

dissimilar metals question

Share this page

G

Guest

Guest
Guest
Offline
I'm in the process of converting to a high pressure fuel system (for fuel injection). Almost done. Had to change the fittings on my fuel tank so I had JIC (Steel) fittings welded on to the tank. I'm using ss braided hose and want to use anodized aluminum AN fittngs to connect to the tank. But I'm wondering if I'll have a corrosion problem. From the brief research I just did on the i'net I'm thinking I won't have much of a problem. Seems that part of the equation is the presence of a conductive agent - such as water - and seems that gasoline isn't a great conductor. And the connections will be in a dry location. So I should be in good shape, correct?
 
You're in a part of the country where the possibility of "salt air" needs to be considered too. Just keep an eye on it. If'n you see the dreaded "white chalky stuff" forming around the fittings you need to tend to it.
 
It's true that an electrolyte must be present in order for dissimilar metal corrosion to occur. But you are supposed to use steel with steel fittings and aluminum with aluminum fittings. Can you use steel on the tank side of the hose?
 
Maybe - found some on Summit Racings website but I'm not sure if they match up exactly. they don't really look the same.
 
Actually upon further checking they have a steel one for about $30 that looks like it would work and a nickel plated aluminum for about $7 that looks like it would work. Seems to me that nickel plated Aluminum should be no problem at all. Or should I spend the extra $23 for the steel? I've got a buy two (feed and return) so it's a difference of about $46.
 
Yea....Wondered about that myself....

I have seen steel, stainless steel, copper, brass & aluminum all used for fuel lines.

And fittings of various materials connected.

In fact...When I replace rusted lines the inside part is generally in rather good condition.
 
You should be fine. The prob is when something like water is present along with elec. It makes a poor battery and corodes.
 
Allen_M said:
Actually upon further checking they have a steel one for about $30 that looks like it would work and a nickel plated aluminum for about $7 that looks like it would work. Seems to me that nickel plated Aluminum should be no problem at all. Or should I spend the extra $23 for the steel? I've got a buy two (feed and return) so it's a difference of about $46.
Click to expand...

You'll probably be O.K. with aluminum given the difference in cost.

This is why I like working on cars versus airplanes; you can do stuff that's against the rules because there's no FAA regulating you. You can use your best judgement.
 
I didn't think Anodized aluminum corroded.
 
You're right; anodizing is an electrochemical anti-corrosion treatment, but it's not perfect. Ever see a rusty chrome-plated bumper?
 
This is why I like working on cars versus airplanes; you can do stuff that's against the rules because there's no FAA regulating you. You can use your best judgement.

[/quote] twosheds, i agree, with the f.a.a. ya cant break the rules, you cant use your own judement, heck you cant even use common sense! /bcforum/images/%%GRAEMLIN_URL%%/wall.gif
 
Back
Top