Question regarding metal alloys used in aircraft..
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Question regarding metal alloys used in aircraft..
On a.net some posts cover a potential (conditionel !)change in design for the Boeing 787 due to incompatibility of certain materials.
I understand that the mix of certain metal-alloys in conjunction with carbon-fibre or graphite –fibre can result in substantial generation of electricity. (That’s why many dentists take out older mercury-alloys teeth fillings and replace them with ceramic fillings...)
Aluminium being a less-noble metal than titanium seems to be subject to more corrosion-related electron-generation.
I would be interested to learn why this alloy-related “battery” effect was not earlier considered by both manufacturers ( one mentioned that Airbus had to use titan rather than steel or aluminium for the pods in order to counter this effect.)
I understand that the mix of certain metal-alloys in conjunction with carbon-fibre or graphite –fibre can result in substantial generation of electricity. (That’s why many dentists take out older mercury-alloys teeth fillings and replace them with ceramic fillings...)
Aluminium being a less-noble metal than titanium seems to be subject to more corrosion-related electron-generation.
I would be interested to learn why this alloy-related “battery” effect was not earlier considered by both manufacturers ( one mentioned that Airbus had to use titan rather than steel or aluminium for the pods in order to counter this effect.)
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> 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.
> “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.
