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Bolt refinishing

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Orcade-Ian:
Steve,
You may already be aware but if you do go down the stainless route, then a good barrier paste is essential to prevent galvanic corrosion between those dissimilar metals.  In the Aircraft industry we had to use Duralac.  This is still available as Duralac green.  DON'T use copaslip!  I think Lear do one in their ACF 50 range, called 'Corrosion block'.
Ian

McCabe-Thiele (Ted):
Interesting information Ian - made me wonder just how much greater the galvanic effect is for  SS compared the original steel bolts.

Orcade-Ian:
Ted,
The possibility (probability) of galvanic corrosion depends on the 'nobility' of the the two dissimilar  metals - Stainless and aluminium alloys are quite far apart in nobility, so when dampness (water, esp containing salt) is present, you have set up a simple cell and Mr Galvani has his wicked way!  I dare say that one of our 'chemical brothers' with a better explanation with 'anions and cations' will chime in.  Zinc is closer to aluminium but it's still good practice to use something like 'Corrosion block' grease where possible - it makes future dismantling easier.  I always remember a chap I served my time with saying 'Always make it easy for the next person who might have to work on this job - it might be you yourself!'  Great advice that I have tried to follow.

Ian

Deano400:
Ian, I don't know anything from a scientific view but found this. Supports your comments I think.

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Orcade-Ian:
That's a great graphical way of showing the problem Deano, many thanks for sharing that!
Ian

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