PA32-260, main fuel tank screws.

[AmarilloMike]

I have a very small leak somewhere at the back of the left main fuel tank. At least the fuel appears at the flange at the back of the tank. I will have it fixed at the annual in June. I will be participating in the annual and the tank repair, all under the supervision of an A&P.

I've read much about using stainless steel structural screws when the tank goes back in. My friend says the stainless screws are more likely to corrode the aluminum than the zinc plated steel structural screws.

I have googled and found a couple of charts that put aluminum and steel next to each other on the anode end of the spectrum and stainless steel more on the cathodic end of the scale, but with "passive" tacked on, like this one:

https://galvanizeit.org/design-and-fabrication/design-considerations/dissimilar-metals-in-contact

I've searched this forum and read scores of posts about SB1006. Based on those posts I don't see anything wrong with using the stainless screws. Am I missing something?

We will replace fuel lines and fuel vent lines and apply Dinotrol to the spar while we have the tank out.

Thank you.

Best,

Mike

 

[vaflier]

 

[ragwing_nut]

 

[AmarilloMike]

 

[vaflier]

 

[TEG916]

 

[AmarilloMike]