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priming with zinc chromate? And order of build?

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mosquito56

Joined: 24 Aug 2007
Posts: 77
Location: Laredo, Tx

Posted: Thu Jul 30, 2009 2:55 pm Post subject: priming with zinc chromate? And order of build?

Long time reader C rare contributor to discussions as I don't know anything. 

    I seem to remember reading a post about an inspector who said zinc chromatic is neither desirable nor required. I was wondering what the current concensis is on this subject.

  

  Also C What is the correct order?  

        1. Install engine

        2. Remove all clecos and  prime

  

  

      1. reverse above? 

  

  

 I am finishing up on the canopy now and wondering what the next step should be.

  

  

 Thanks 

 Don

 N601NV(reserved)

 Laredo C Tx 

  

NEW mobile Hotmail. Optimized for YOUR phone. Click here.  [quote][b]

_________________
Don Merritt- Laredo, Tx
.

carlossa52(at)gmail.com
Guest

Posted: Thu Jul 30, 2009 3:23 pm Post subject: priming with zinc chromate? And order of build?

Don, I too know nothing, but:

I am priming everything: I believe I will never regret having primed, but the chances are pretty good that, If I do not prime, I will regret it. 

I wold expect that priming after the airplane is built may be a bit difficult...

 

I have noticed corrosion of different pieces of aluminum I kept around for a while (several months to a few years).

The material was kept indoors, and the atmosphere here is not particularly bad for this.

There was no contact with paper or cardboard nor any corrosive substances.

 So, I figure better to do it than to regret not having done it.



Two observations on your note: 

(1) Do not expect consensus on priming !! 

(2) You wonder what the next step should be: I suggest celebrating! You are almost there!

 



Happy building!

but do not archive.



Carlos

CH601-HD, plans

_____________________



2009/7/30 Don Merritt <mosquito-56(at)hotmail.com (mosquito-56(at)hotmail.com)>

 [quote]     Long time reader, rare contributor to discussions as I don't know anything. 

    I seem to remember reading a post about an inspector who said zinc chromatic is neither desirable nor required. I was wondering what the current concensis is on this subject.

  

  Also, What is the correct order?  

        1. Install engine

        2. Remove all clecos and  prime

  

  

      1. reverse above? 

  

  

 I am finishing up on the canopy now and wondering what the next step should be.

  

  

 Thanks 

 Don

 N601NV(reserved)

 Laredo, Tx  



[b]

z601(at)anemicaardvark.co
Guest

Posted: Fri Jul 31, 2009 5:36 am Post subject: priming with zinc chromate? And order of build?

On Thursday 30 July 2009 17:43, Don Merritt wrote:

 	  Quote: 	
		   Long time reader, rare contributor to discussions as I don't know anything.



    I seem to remember reading a post about an inspector who said zinc

 chromatic is neither desirable nor required. I was wondering what the

 current concensis is on this subject.



<snip>
	




Zinc chromate is one of many acceptable primers.  There are  places where some 

sort of primer is required. Normally, on certificated aircraft, the FAA (and 

thus the inspector) defer to whatever the manufacturer recommended. Sometimes 

that's zinc chromate; sometimes something else.



One could argue that some of the newer primers are better (and hence, maybe 

more desirable). But zinc chromate works: you can sometimes see aircraft from 

WWII which still have the zinc chromate and still have the metal underneath 

intact. 



For whatever it's worth, that's what I'm using on my 601XL between mating 

surfaces. Since this is a non-certrificated aircraft, I could use whatever I 

wanted to, but zinc chromate has a good track record with me. I'm not saying 

that all the other primers are bad;  just that I've never had any problems 

with this one.

=============================================

                Do not archive.

=============================================

                Jim B Belcher

    BS, MS Physics, Math, Computer Science

                  A&P/IA

     Retired aerospace technical manager

=============================================

Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Fri Jul 31, 2009 5:54 am Post subject: Re: priming with zinc chromate? And order of build?

ZC was the primer of choice when I started building and what I used everywhere metal meets metal in the tail and wings and firewall. I also used it in the rear part of the fuselage where inspection is harder.



I didn't use it quite as much in the forward part of the firewall. because inspection won't be as much of an issue.



Keep in mind that 6061-T6 has pretty good anti-corrosion properties all by itself and I noticed you are from Laredo. It's pretty dry there isn't it?

_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR

airelectricjim

Joined: 09 Jan 2009
Posts: 11
Location: Augusta GA USA

Posted: Fri Jul 31, 2009 7:10 am Post subject: priming with zinc chromate? And order of build?

Hi, Don (and List),



Re: order of build, a suggestion:  If you haven't closed up your plane 

yet, consider electrical wiring.  Running conduit (Van's nylon 

corrugated conduit P/N DUCT NT5/8-50) through hard-to-reach places while 

they're still accessible is MUCH easier than trying to fish conduit or 

wire bundles after riveting.  (Don't ask me how I know!!!)  It's light, 

flexible, and can be secured using plastic conduit straps from Lowe's 

Electrical Aviation Department.  Pull a light string through each 

conduit run with a vacuum cleaner, and use it to pull the wires through 

later.



Blue skies and tailwinds to all

Jim

CH-801

DeltaHawk diesel

90% done 120% left

_________________
Jim
Zenith CH801
DeltaHawk diesel
jmcburney@pobox.com

mosquito56

Joined: 24 Aug 2007
Posts: 77
Location: Laredo, Tx

Posted: Fri Jul 31, 2009 2:48 pm Post subject: Re: priming with zinc chromate? And order of build?

Glad to hear that zc is still the way to go. 

Next question is , Can I put the engine on and run it with the airplane in clecoes?

_________________
Don Merritt- Laredo, Tx
.

Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Sat Aug 01, 2009 9:44 am Post subject: Re: priming with zinc chromate? And order of build?

 	  mosquito56 wrote: 	
		  Glad to hear that zc is still the way to go. 

Next question is , Can I put the engine on and run it with the airplane in clecoes? 	




While you could probably do it 100 times and 99 of those times wouldn't be a problem you don't know when that one time it is going to cause a problem is going to happen.

_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR

pmaxpmax(at)HOTMAIL.COM
Guest

Posted: Sat Aug 01, 2009 10:20 am Post subject: priming with zinc chromate? And order of build?

I don't see much advantage to leaving the fuselage in clecoes and doing an engine run. Why not just rivet it?  If you need to get to certain areas in the future it only takes a few minutes to drill out the rivets. 



Phil Maxson

601XL/Corvair

burbby

Joined: 22 Oct 2006
Posts: 34
Location: Millsap, TX

Posted: Mon Aug 03, 2009 4:53 pm Post subject: priming with zinc chromate? And order of build?

I would NOT think so.... they are strong but i dont think that is a good idea... 



Let me know how that turns out!!!



Gary

--- On Fri, 7/31/09, mosquito56 <mosquito-56(at)HOTMAIL.COM> wrote:



 	  Quote: 	
		   From: mosquito56 <mosquito-56(at)HOTMAIL.COM>

 Subject: Re: priming with zinc chromate? And order of build?

 To: zenith-list(at)matronics.com

 Date: Friday, July 31, 2009, 5:48 PM

 

 "mosquito56" <mosquito-56(at)hotmail.com>

 

 Glad to hear that zc is still the way to go. 

 Next question is , Can I put the engine on and run it with

 the airplane in clecoes?

 

 --------

 Don Merritt- Laredo, Tx

   Apologies if I seem antagonistic.

   I believe in the freeflowing ideas and discussions

 between individuals for assistance in this thing we call

 life.

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p 55435#255435

 

 

 

 

 

 

 

 Email Forum -

 FAQ,

    - MATRONICS WEB FORUMS -

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 Dralle, List Admin.

burbby

Joined: 22 Oct 2006
Posts: 34
Location: Millsap, TX

Posted: Mon Aug 03, 2009 5:10 pm Post subject: priming with zinc chromate? And order of build?

Not a problem here..... 

I think i have used about a dozen cans of zinc and some other type that Zenith likes.... The Zinc is easier to use but not good for people to breath.   Please use it in a well ventlated area and Do Not breath any.  Read the MSDS on Zinc Chromate it is nothin to play with..  Just friendly advice.



Thanks

Gary



--- On Mon, 8/3/09, burbby <burbby(at)yahoo.com> wrote:



 	  Quote: 	
		   From: burbby <burbby(at)yahoo.com>

 Subject: Re: Re: priming with zinc chromate? And order of build?

 To: zenith-list(at)matronics.com

 Date: Monday, August 3, 2009, 7:50 PM

 

 burbby <burbby(at)yahoo.com>

 

 

 I would NOT think so.... they are strong but i dont think

 that is a good idea... 

 

 Let me know how that turns out!!!

 

 Gary

 

 

 --- On Fri, 7/31/09, mosquito56 <mosquito-56(at)HOTMAIL.COM>

 wrote:

 

 > From: mosquito56 <mosquito-56(at)HOTMAIL.COM>

 > Subject: Re: priming with zinc chromate?

 And order of build?

 > To: zenith-list(at)matronics.com

 > Date: Friday, July 31, 2009, 5:48 PM

 > 

 > "mosquito56" <mosquito-56(at)hotmail.com>

 > 

 > Glad to hear that zc is still the way to go. 

 > Next question is , Can I put the engine on and run it

 with

 > the airplane in clecoes?

 > 

 > --------

 > Don Merritt- Laredo, Tx

 >   Apologies if I seem antagonistic.

 >   I believe in the freeflowing ideas and discussions

 > between individuals for assistance in this thing we

 call

 > life.

 > 

 > 

 > 

 > 

 > Read this topic online here:

 > 

 > http://forums.matronics.com/viewtopic.php?p 55435#255435

 > 

 > 

 > 

 > 

 > 

 > 

 > 

 > Email Forum -

 > FAQ,

 >    - MATRONICS WEB FORUMS -

 > List Contribution Web Site -

 >               -Matt

 > Dralle, List Admin.

 > 

 > 

 > 

 > 

 

 

       

 

 

 Email Forum -

 FAQ,

    - MATRONICS WEB FORUMS -

 List Contribution Web Site -

               -Matt

 Dralle, List Admin.

mosquito56

Joined: 24 Aug 2007
Posts: 77
Location: Laredo, Tx

Posted: Wed Aug 26, 2009 8:45 pm Post subject: Re: priming with zinc chromate? And order of build?

Thanx for the info guys. I have decided to continue using the zinc chromate and rivet the plane before putting the engine on. 



  I drilled my last holes today and will begin disassembly tomorrow for painting.

_________________
Don Merritt- Laredo, Tx
.

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