6061-T6 in contact with CF8M Corrosion Concerns

[efulm4444]

Our assembly has a 6061-T6 component attaching to a CF8M component. The 6061-T6 is anodized per MIL-A-8625, Type II. The connection would be exposed to air on one side and oil on the other. Should we assume there will be galvanic corrosion between the components?

 

[TugboatEng]

As long as the air isn't wet there should be no issue. I have seen couplings of bronze and hard anodized aluminum exposed to salt spray and the aluminum did hold up very well. Any defects in the coating and it's fried.

 

[EdStainless]

As long as there is no moisture you are fine.
If it gets wet the Al is toast.

 

[WKTaylor]

What is the min/max operating temperatures at the dissimilar metals contact points.

Inconel and aluminums have grossly different expansion/contractions coefficients... and service temperatures

RE: SAE AIR809 Metal Dimensional Change with Temperature

Run some calculations and see how closely the metals [in contact] are matched to each-other.