> I would be interested to learn why this alloy-related
> “battery” effect was not earlier considered
What makes you think it wasn't considered at the right time? It's been a know issue for at least 10 years.
Google will find you some articles..
Aircraft Corrosion Design Issues
http://www.corrosion-doctors.org/Des...aft-design.htm
Design for Corrosion
http://www.boeing.com/commercial/aer...07/corrosn.htm
> many dentists take out older mercury-alloys
> teeth fillings and replace them with ceramic fillings.
Nope. Some dentists do remove fillings but not because there is an electrolytic action - its usually because the patient has become scared of the mercury. Try asking about this at sci.med.dentistry and see what answers you get.