Welcome Guest [Log In] [Register]
Posted ImageWelcome to the all new Geo Metro Forum. We hope you enjoy your visit.

You're currently viewing our forum as a guest. This means you are limited to certain areas of the board and there are features you can't use and images you can't see. Registration is simple, fast, and completely free. If you're already a member please log in to your account to access all of our features:

Join our community!




Username:   Password:
Add Reply
CORROSION Prevention and Repair
Topic Started: Jul 14 2014, 09:31 PM (1,648 Views)
TimmyD
Member Avatar
A Metro Driver

...I need me some of all the stuff...
Offline Profile Quote Post Goto Top
 
evmetro


It is nice to see a fellow USN trained corrosion control guy. I did a lot of time in the corrosion control work centers in my various squadrons. (P3s, H53s, C2s). I was a structural mechanic (AMS) and did a lot of time in the airframes shop, but after I got the aircraft paint and ensignia school, I got stuck working corrosion control a lot more.

If I remember correctly, you need an anode, a cathode, and an electrolytic path for corrosion to occur... And I will leave the rest of it for you, since it is your thread.
Offline Profile Quote Post Goto Top
 
freegeo
Member Avatar


Has anyone tried the flex seal stuff for undercoating. Wondering how much it costs compared to other sealing products?
Online Profile Quote Post Goto Top
 
Greywolf
Member Avatar
Mostly Harmless

* I'm trying to cheat here, since lately I've gotten burned out on writing too much

NOW FOR THE BOMB....

THIS LINK is to a page where you can download your very own copy (in PDF form, I think) of NAVAIR 01-1A-509-1
~which is the first of at least FIVE technical instruction manuals in use by the US NAVY and MARINE CORPS for the cleaning, preservation, and corrosion control and treatment of naval aircraft and avionic systems


(I know, it's a mouthful...)

8.92 Megabyte download, it's an official tech manual from a series that is still current.

http://www.everyspec.com/USN/NAVAIR/NAVAIR_01-1A-509-1_8121/

Here is a complete list of downloadable related NAVAIR manuals - so that you can get a complete set:

http://www.everyspec.com/USN/NAVAIR/

In that first manual above though - you will find the best and most comprehensive explanation of corrosion, what it is, how many kinds there are, and what can be done about it that I think you will find anywhere, it is free, and you can save it for later reference!!!

~Now you see why I didn't just jump in and start writing. First of all, it has been done far better than I can.
Second, I would still be writing when the first shovel full of dirt landed on my coffin...
It's a huge topic.

But by showing you THIS I am following Robert Heinlein's "Principle of Least Action Required" and also the concept "Never Reinvent what you can Buy Down the Street..."

ADVICE CODE?
Download the NAVAIR series, then see what the 509-1 has to say in chapter three.

These manuals even include full color images of what different kinds of corrosion look like

When fine young navy and marine corps individuals go through training as maintenance techs of various kinds, we also get sent to a week long school just to walk us through this series of manuals and show us what we need to know to keep hi-performance aircraft and other government assets from reverting to their natural state (IE: metal bearing dirt and crud).

There is a lot of information here...



Edited by Greywolf, Jul 19 2014, 12:29 AM.
Offline Profile Quote Post Goto Top
 
snowfish
Member Avatar
Basic GearHead

Quote:
 
3-7. DEVELOPMENT OF CORROSION. All corrosive attack begins on the surface of the metal. If allowed to progress, corrosion can penetrate into the metal.
If corrosion begins on an inside surface of a component (for example, the inner wall of a metal tube), it may go
undetected until perforation occurs :die .

Sounds like our classic frame horn scenario. :smackface Have more reading to do. :news Good stuff GreyWolf. :thumb Thanks. :cheers
Online Profile Quote Post Goto Top
 
Greywolf
Member Avatar
Mostly Harmless

INTRA-GRANULAR corrosion in castings is an even worse nightmare, but usually it's caused by bad castings. I don't think I've ever seen that except rarely. A solid piece will suddenly just crumble....

The nice thing about this set of books is that its so comprehensive

(not to mention the price)
Offline Profile Quote Post Goto Top
 
clarkdw


snowfish
Jul 19 2014, 08:40 AM

Sounds like our classic frame horn scenario. :smackface Have more reading to do. :news Good stuff GreyWolf. :thumb Thanks. :cheers
:gp

Thanks Greywolf. The manual is required reading for those of us hoping to keep our 20+ year old Metros on the road all year in the rust belt. It is a never-ending war fighting off the terminal disease of corrosion.

I am in the process of doing that today on my rear brakes.
Offline Profile Quote Post Goto Top
 
evmetro


Navy advancement exam question: How many forms of corrosion are there?

Here are a few: intergranular, stress, fretting, fatique, galvanic, microbiological. There are a bunch more, but I would take a long time for me to dig them all up from the archives of my brain. The Navy was almost 20 years ago...
Edited by evmetro, Jul 19 2014, 12:17 PM.
Offline Profile Quote Post Goto Top
 
Greywolf
Member Avatar
Mostly Harmless

evmetro
Jul 19 2014, 12:05 PM
Navy advancement exam question: How many forms of corrosion are there?

Here are a few: intergranular, stress, fretting, fatique, galvanic, microbiological. There are a bunch more, but I would take a long time for me to dig them all up from the archives of my brain. The Navy was almost 20 years ago...
But that's the point, exactly ~ you can download the complete and entire NAVAL AVIATION CORROSION MANUAL SET for free, in PDF format, and even burn the whole series to a disc if you don't want to keep them on your computer. In case you missed the link:

NAVAIR 01-1A-509-1 (VOLUME 1)
NAVAIR 01-1A-509-2 REV. 2005 (VOLUME 2)
NAVAIR 01-1A-509-3 REV. 2005 (VOLUME 3)
NAVAIR 01-1A-509-4 (VOLUME 4)
NAVAIR 01-1A-509-5 REV. 2005 (VOLUME 5)

For volume IV I had to go to a different source, but that's all five of those.

Stand by one... OTAY.

NA 16-1-540 was revised in 2000, and is sometimes listed as NAVAIR-TM-16-1-540. It is the Organizational/Unit (Flight Line) and Intermediate (IMA) manual for Avionics Cleaning and Corrosion Prevention and Control.
*NOTE: The link below will IMMEDIATELY download the manual to your PC if you click on it - the links above go to a download page with a description.

NAVAIR 16-1-540 REV. 2000

Wheeeew... What a load of link chasing! Consider it your tax dollars working for YEW... :type

For the civvies in the house - don't mention it. But DO check out those manuals, each of which are cleared for dissemination and use by the civilian population.


~Wolfie

PS: 16-1-1A-509-5 may not be very useful, it is mainly a list of materials that can be used and many of them have mil part numbers or national stock numbers


Edited by Greywolf, Jul 20 2014, 12:10 AM.
Offline Profile Quote Post Goto Top
 
evmetro


When I got out in 96, none of the pubs were on the internet yet, we just had the binders in the library. It would be interesting to see if they still use the main pub library with all the binders anymore? Seems like it would be easier to just look things up on a cell phone, unless those are FOD hazards... It does not seem like that long ago when I got out, but now I am feeling old...
Offline Profile Quote Post Goto Top
 
Greywolf
Member Avatar
Mostly Harmless

Well - I remember seeing a training film all about how MIARS readers were "Here to stay...". I dunno if you remember those damned things.

Being able to save a lot of info on a disc or in a computer is all well and good - but for schematics and things like that a PAPER COPY is the only thing on earth worth having. Thank God for printers....

But in the shops I was involved with, if you had printed copies of manuals around you had to hide them during a QA audit or it was an instant bust!!! The reason was supposedly because you might not have the latest AVC or REVISION.

MIARS tapes were a miserable thing to deal with.

* I think it stood for: Microfilm Information and Retrieval System
Edited by Greywolf, Jul 21 2014, 03:01 AM.
Offline Profile Quote Post Goto Top
 
1 user reading this topic (1 Guest and 0 Anonymous)
« Previous Topic · General Tech and Tool Talk · Next Topic »
Add Reply