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Zinc Chromate - MSDS, Respirator, Reducer

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dvanlanen

Joined: 25 Jul 2006
Posts: 122
Location: Madison, WI

Posted: Tue Aug 29, 2006 6:10 pm Post subject: Zinc Chromate - MSDS, Respirator, Reducer

I purchased a quart of PTI green zinc chromate from Aircraft Spruce (P/N 09-00917).  I’m planning to thin and brush the product on faying surfaces only.  I have a few questions before I begin using it:  

·       I asked A/S for an MSDS for the product.  The document they sent contained a product name of “GREEN NON CHROMATE AEROSOL”.  Did they send me the wrong MSDS?  If so, does anyone have the correct MSDS, as I seem to be having trouble getting an e-mail response from A/S?  

·       I previously purchased a NIOSH approved TC-84A-0991 respirator, as recommended by another builder.  However, I came across an old post in the archive that says this product gives off iso-cyanates when curing.  The MSDS also mentions cyanosis as an outcome of over-exposure.  The instructions with my respirator specifically state that it is not to be used with paints or coatings containing iso-cyanate materials.  Do I need a different respirator, and if so, which one?   

·       What is the correct reducer that I should be using to thin this product, (I also asked this question of A/S, but have not received a response)?  

Thanks,  

Dave Van Lanen  

Madison, WI  

601XL - stabilizer      [quote][b]

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pacificpainting(at)comcas
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Posted: Tue Aug 29, 2006 7:23 pm Post subject: Zinc Chromate - MSDS, Respirator, Reducer

Dave,

  

 If what you have is Zinc Chromate, then that's what  the MSDS sheet should say. There is also a Zinc Oxide primer that is being  substituted for Zinc Chromate. I believe it is supposed to be  "safer".

 The Zinc Chromate I have been using is Pittsburgh  brand. They recommend an appropriate respirator or fresh air mask system. I  don't believe that this product contains iso cyanates, but it may. Don't take my  word for it. Read the label or appropriate MSDS sheet. Try doing a search for  the product you have on your web browser. Most all paint products don't  recommend thinning. It is usually due to the fact that the thinner you use will  make the product so that it isn't VOC compliant any more. I thin what I am using  with either paint thinner (mineral spirits) or lacquer thinner. Check with ACS  to make sure you have what you think you do, and the proper information on  it.

 Hope this helps some.

  

 Dave in Salem

 801

  

  

 [quote]   ---

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p.mulwitz(at)worldnet.att
Guest

Posted: Tue Aug 29, 2006 7:44 pm Post subject: Zinc Chromate - MSDS, Respirator, Reducer

Hi Dave,



 First, it sounds like the MSDS you got was for a different product since the names don't match.



 I would recommend you try to find the manufacturer's web site.  If there is no manufacturer listed on the paint can then I don't know what to suggest.  If you can find the manufacturer, then you can certainly get the correct MSDS - probably online.  



 I wouldn't worry about isocyanates unless the MSDS and'or can says they are included in the product.  The proper MSDS will give the necessary safe handling and use instructions.



 If none of that works out, please post again.  Maybe someone can help find the correct MSDS given a picture of the can or more information you might find.



 Good luck,



 Paul

 XL fuselage

 do not archive



 

 At 07:08 PM 8/29/2006, you wrote:



  	  Quote: 	
		  I purchased a quart of PTI green zinc chromate from Aircraft Spruce (P/N 09-00917).  I’m planning to thin and brush the product on faying surfaces only.  I have a few questions before I begin using it:

 

 ·        I asked A/S for an MSDS for the product.  The document they sent contained a product name of “GREEN NON CHROMATE AEROSOL”.  Did they send me the wrong MSDS?  If so, does anyone have the correct MSDS, as I seem to be having trouble getting an e-mail response from A/S?



 ·        I previously purchased a NIOSH approved TC-84A-0991 respirator, as recommended by another builder.  However, I came across an old post in the archive that says this product gives off iso-cyanates when curing.  The MSDS also mentions cyanosis as an outcome of over-exposure.  The instructions with my respirator specifically state that it is not to be used with paints or coatings containing iso-cyanate materials.  Do I need a different respirator, and if so, which one? 



 ·        What is the correct reducer that I should be using to thin this product, (I also asked this question of A/S, but have not received a response)?

 

 Thanks,

 

 Dave Van Lanen

 

 Madison, WI

 

 601XL - stabilizer

 	
 

 ---------------------------------------------

 Paul Mulwitz

 32013 NE Dial Road

 Camas, WA 98607

 ---------------------------------------------

     [quote][b]

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lwinger

Joined: 21 Jun 2006
Posts: 229
Location: Tustin, CA

Posted: Tue Aug 29, 2006 8:15 pm Post subject: Zinc Chromate - MSDS, Respirator, Reducer

I've communicated offline with Dave, but I'll tell the list that I'm in communication with the President of PTI about providing some definitive test data on their Zinc Chromate and Zinc Oxide primers, including clear test data on surface prep.  He took enough interest in the project to come to my place of work to pick up some 6061-T6 sheets and parts I have made for my 601XL.  The chemist has those parts now and will be running test over the next few days. 

  

 I'll be reporting the results. I think there is good news ahead for all who would like to get the protection of ZC or ZO without all the prep steps that have customarily been required.

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_________________
Larry Winger
Tustin, CA
Plans building 601XL/650 with Corvair
Installing fuel system
www.mykitlog.com/lwinger

lwinger

Joined: 21 Jun 2006
Posts: 229
Location: Tustin, CA

Posted: Wed Aug 30, 2006 12:09 pm Post subject: Re: Zinc Chromate - MSDS, Respirator, Reducer

Below are the quick answers provided by PTI's President to Dave Van Lanen's questions.  I'm forwarding the Zinc Chromate Primer MSDS to Dave, and will be glad to do so to anyone who contacts me with a request.  We should have real test data from PTI very soon and I'll be posting that when available.



Q:  I asked A/S for an MSDS for the product.  The document they sent contained a product name of "GREEN NON CHROMATE AEROSOL" .  Did they send me the wrong MSDS?  If so, does anyone have the correct MSDS, as I seem to be having trouble getting an e-mail response from A/S ? 



A: The msds sent  is not the correct one.  Please  forward the one attached.



Q: I previously purchased a NIOSH approved TC-84A-0991 respirator, as recommended by another builder.  However, I came across an old post in the archive that says this product gives off iso- cyanates when curing.   The MSDS also mentions cyanosis as an outcome of over-exposure.  The instructions with my respirator specifically state that it is not to be used with paints or coatings containing iso -cyanate materials.  Do I need a different respirator, and if so, which one ? 



A: Zinc  chromated  coatings  do not give off  isocyanates --  polyurethanes do.  You need to contact a respirator  company that can  provide you with guidance on  using  a respirator that can filter organic solvents and fumes from paint.  Please note that  when  zinc chromated primers are formulated the zinc dust is  "wetted" into the coating.  There is no exposure to zinc dust  when applying the primer.  However,  if you sand the  cured primer  you do run the risk of inhaling  zinc dust particles.  If you plan to sand, you should wear an appropriate respirator or dust  mask  when doing so.  Other protective  clothing to keep  the dust off  of your  skin is also recommended.



Q: What is the correct reducer that I should be using to thin this product , (I also asked this question of A/S, but have not received a response )?  



A: The reducer to use  is  the PT-1022X66,  PT-1003  Type 3.

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_________________
Larry Winger
Tustin, CA
Plans building 601XL/650 with Corvair
Installing fuel system
www.mykitlog.com/lwinger

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