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Salt water environment?

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Dsyvert(at)aol.com
Guest

Posted: Thu Nov 09, 2006 6:06 pm Post subject: Salt water environment?

Group,

  

     I need to get this off my chest. I may be a product  of the public school system, but the engineering school I attended taught  that water evaporates and salt does not go into the vapor phase. When we  talk about salt water environment for primers, etc. we are really talking about  areas of high humidity vs. areas of low humidity. Exhibit number one. The Great  Salt Lake in Utah. Why does it not evaporate? If you want to see a real salt  water environment travel to Chicago after a big snow storm and see all the salt  on the roads that sprays salt water and corrodes cars. Here in Houston there are  many more old cars around than in Chicago where I use to live.

  

     The reason I posted this is that we need to talk  about the cause of corrosion "high humidity" not salt water environment.

  

     BTW, I plan on using an epoxy primer. I've  debated which if any primer with myself a lot. My reason is that the  RV-10 is a high dollar kit plane. If I ever sell mine then no one will ever  question epoxy primer. 

  

 Sorry about the ranting, but I read about salt water environments on Van's  Air Force forums as the reason for primers. Am I missing anything here?

  

 Dave Syvertson

 RV-10 Tail kit

 do not archive

  [quote][b]

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MauleDriver(at)nc.rr.com
Guest

Posted: Thu Nov 09, 2006 7:36 pm Post subject: Salt water environment?

I think it is the salt water *mist* rather than water vapor.  I'm not 

sure those are the right terms but I do know that areas near ocean surf 

have lot's of salt mist.  It collects on practically all surfaces.  That 

may not be the case where there is little surf and therefore perhaps not 

the case around the Great Salt Lake.



When I was shopping for a Maule, I ran across an aircraft in inland GA.  

It had been refinished and was less than 10 years old.  However, even to 

my untrained eye, I could see a great deal of corrosion around the 

interior airvents which were the only unfinished aluminum parts in 

sight.  I presumed it was a 'Florida' plane.  Never confirmed my 

suspicion but I've owned a similar Maule for 10years and there is no 

sign of similar corrosion on the same parts.

do not archve

Dsyvert(at)aol.com wrote:

 	  Quote: 	
		   Group,

  

     I need to get this off my chest. I may be a product of the public 

 school system, but the engineering school I attended taught that water 

 evaporates and salt does not go into the vapor phase. When we talk 

 about salt water environment for primers, etc. we are really talking 

 about areas of high humidity vs. areas of low humidity. Exhibit number 

 one. The Great Salt Lake in Utah. Why does it not evaporate? If you 

 want to see a real salt water environment travel to Chicago after a 

 big snow storm and see all the salt on the roads that sprays salt 

 water and corrodes cars. Here in Houston there are many more old cars 

 around than in Chicago where I use to live.

  

     The reason I posted this is that we need to talk about the cause 

 of corrosion "high humidity" not salt water environment.

  

     BTW, I plan on using an epoxy primer. I've debated which if any 

 primer with myself a lot. My reason is that the RV-10 is a high dollar 

 kit plane. If I ever sell mine then no one will ever question epoxy 

 primer.

  

 Sorry about the ranting, but I read about salt water environments on 

 Van's Air Force forums as the reason for primers. Am I missing 

 anything here?

  

 Dave Syvertson

 RV-10 Tail kit

 do not archive

 *

 *

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ericmpmail-rv10(at)yahoo.
Guest

Posted: Thu Nov 09, 2006 8:29 pm Post subject: Salt water environment?

Dave,



Think of salt in the air as an aerosol, similar to the

soot from a forest fire, or dust from a dust storm,

pollen in the air, etc. Wind across the ocean forms

waves, breaking waves send up a spray of salt laden

water. Much of this falls back to the sea, but the

smallest can be carried far inland depending on winds,

etc. Once salt gets on a surface, it is very hard to

get rid of.



Now that winter is upon us, a reminder than unvented

indoor space heaters using kerosene put out a trace

amount of soot that is not good to breathe and also

can effect the adhesion bond of fiberglass laminates.

I understand it was a particular issue in the scratch

built composite days (Long-ez, etc). I don't think the

RV-10 has any structural laminations so not as much of

a concern. (Cabin top comes "done").



Eric

  



--- Dsyvert(at)aol.com wrote:



 	  Quote: 	
		   Group,

  

     I need to get this off my chest. I may be a

 product  of the public school 

 system, but the engineering school I attended taught

  that water evaporates 

 and salt does not go into the vapor phase. When we 

 talk about salt water 

 environment for primers, etc. we are really talking

 about  areas of high humidity 

 vs. areas of low humidity. Exhibit number one. The

 Great  Salt Lake in Utah. 

 Why does it not evaporate? If you want to see a real

 salt  water environment 

 travel to Chicago after a big snow storm and see all

 the salt  on the roads that 

 sprays salt water and corrodes cars. Here in Houston

 there are  many more old 

 cars around than in Chicago where I use to live.

  

     The reason I posted this is that we need to talk

  about the cause of 

 corrosion "high humidity" not salt water

 environment.

  

     BTW, I plan on using an epoxy primer. I've 

 debated which if any primer 

 with myself a lot. My reason is that the  RV-10 is a

 high dollar kit plane. If 

 I ever sell mine then no one will ever  question

 epoxy primer. 

  

 Sorry about the ranting, but I read about salt water

 environments on Van's  

 Air Force forums as the reason for primers. Am I

 missing anything here?

  

 Dave Syvertson

 RV-10 Tail kit

 do not archive

- The Matronics RV10-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV10-List

armywrights(at)adelphia.n
Guest

Posted: Thu Nov 09, 2006 8:33 pm Post subject: Salt water environment?

U.S. Army has a requirement to write up any time an aircraft flies closer

than 10 miles to salt water, to alert maintenance for a wash or other

preventative measures.



Rob Wright

--

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