[Healeys] Healeys] Boot pan to shroud

[Bob Spidell]

I was going to be pedantic (as usual) and point out that rust IS corrosion, but decided not to. 

I think John has a good point, at least in my case. When I separated the pan and the shroud there was a fairly thick layer of iron rust/corrosion on the shroud lip (the lip of the pan was still mostly there). But, I cleaned the rust off with a small sander and the aluminium underneath was in perfect condition. 


bs 

-------------------------------- 
Bob Spidell - San Jose, CA 



John, sorry, but I have to disagree. Aluminium (sorry - aluminum) is the 
weakest of the two mating materials and therefore the main problem with this 
joint will be the aluminum which will suffer from electrolytic(galvanic) 
corrosion. A rust film will form on the steel, but it's the aluminum that 
will disappear much faster than the steel. Therefore corrosion is the 
problem, not rust. 
Jack Aeckerlin, The Netherlands 
1964 BJ8 29432 

2010/10/16 john spaur <jmsdarch at sbcglobal.net> 

> Rust is the problem with this joint, not corrosion! Paint the mating 
> surfaces well. I also ran caulk on the seam, feathered it out and finished 
> it with paint. It's not perfectly finished and I doubt it's Concours either. 
> John 
> 
> At 08:59 AM 10/15/2010 +0200, Jaap Aeckerlin wrote: 
> 
>> Bob, you have to realise that electrolytic corrosion only takes place when 
>> the relative humidity at the joint is over 50%. Any permanent elastic 
>> mass.... 
>> Jack Aeckerlin, The Netherlands 
>> 1964 BJ8 29432