Factory Corrosion Proofing?

[prflyer]

I could not find an answer by searching the forums.  Did the Mooney factory apply corrosion proofing internally on any of the vintage Mooney models from the 60s?

 

Thanks,

 

Fernando

 

[M20F]

My 67F is zinc chromated.

[Raptor05121]

I believe they did it for a few select years in the mid 60s. Someone more knowledgable will give those dates. Of course, a plan hangared and taken care of can be in much better shape than a zinc chromated one that has been sitting outside its entire life.

[mooniac15u]

My 63D was zinc chromated.

[rbridges]

same with my 65 c

[M20F]

I do recall reading somewhere that it was an option not standard. No idea if that is the truth or just hanger talk.

[carusoam]

65C was nicely green/yellow in the tail cone...

-a-

[Yetti]

depends on what you are talking about the tube structure got epoxy some time between the 60s and 1975

[1964-M20E]

My 64
E was not but my 67F is 

[RobertGary1]

65C was nicely green/yellow in the tail cone...

-a-

 

I believe that's just primer. If you just had bare metal you'd get corrosion pretty fast.

 

-Robert

[DXB]

I believe that's just primer. If you just had bare metal you'd get corrosion pretty fast.

 

-Robert

Many of these older planes have the bare aluminum and are fine.  My '68 C has the yellow zinc chromate

[MyNameIsNobody]

I believe that's just primer. If you just had bare metal you'd get corrosion pretty fast.

 

-Robert

I believe you are not correct...

[prflyer]

Thanks everyone. Seems like it might have been an option. I know of at least one 65E that does not appear to be zinc chromated from the factory. However, if anyone has info on whether some years all airplanes were treated at the factory, that would be good to know.

 

Fernando

[HRM]

Thanks everyone. Seems like it might have been an option. I know of at least one 65E that does not appear to be zinc chromated from the factory. However, if anyone has info on whether some years all airplanes were treated at the factory, that would be good to know.

 

So how do you tell if it was?

 

My '65/6E is yellow green all over the inside.

 

It is corrosion-free to a T (had the once-over by the legendary Bruce Jaeger and pronounced 'clean').

 

She's hangared, but in SETX that does not say much.

[prflyer]

So how do you tell if it was?

 

My '65/6E is yellow green all over the inside.

 

It is corrosion-free to a T (had the once-over by the legendary Bruce Jaeger and pronounced 'clean').

 

She's hangared, but in SETX that does not say much.

 

I'm no expert, but my understanding is that the yellow green inside your airplane is in fact the factory applied corrosion protection.

 

Hopefully someone will know if there were any particular years and/or models where the factory applied the corrosion protection.  

 

Thanks,

 

Fernando

[Shadrach]

I believe that's just primer. If you just had bare metal you'd get corrosion pretty fast.

 

-Robert

It's zinc chromate primer and it is a corrosion inhibitor. The inside wings in my 67 are not treated with zinc chromate, but the fuselage is. There is some very very light ash on the inner surface of the wings from before it was treated with corrosion X. The bare skin has a thin layer of alclad (pure aluminum) on the outer skin.

https://en.m.wikipedia.org/wiki/Alclad

[DXB]

It's zinc chromate primer and it is a corrosion inhibitor. The inside wings in my 67 are not treated with zinc chromate, but the fuselage is. There is some very very light ash on the inner surface of the wings from before it was treated with corrosion X. The bare skin has a thin layer of alclad (pure aluminum) on the outer skin.

https://en.m.wikipedia.org/wiki/Alclad

I think my '68 is the same, except the 2 spars , which have the yellow zinc chromate for their full lengths.  Interesting info on Alclad.  

[MB65E]

My 65E has the steel tubes painted a brownish primer/paint. The H-Stab is zinc cromated. Small steel angles in the fuselage are painted. No skins in the tail are primed. Nothing in the wings except the centers of the spars. Main, Rear, aft carry thru.

All random to me...

-Matt

[Shadrach]

I think my '68 is the same, except the 2 spars , which have the yellow zinc chromate for their full lengths.  Interesting info on Alclad.

Yes, the spar and some stringers in the wings are also treated!