[PSUBS-MAILIST] Zinc coating

Sat May 2 08:14:57 EDT 2015

Brian,
My system is smaller than what you have and not even from the same planet as Scotts :-)  Wow 5 min and 1/2 nozzle!  Scott can run pea gravel through his :-)  My system holds 80 lb sand and takes 20 min to run it  through.  Your system will be a bit faster, 80 psi and 80 cfm is what my tank and nozzle call for.
Hank--------------------------------------------
On Sat, 5/2/15, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] Zinc coating
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Saturday, May 2, 2015, 12:57 AM

 just
 testing

 ---
 personal_submersibles at psubs.org wrote:

 From: Alan James via Personal_Submersibles
 <personal_submersibles at psubs.org>
 To:
 Personal Submersibles General Discussion
 <personal_submersibles at psubs.org>
 Subject: Re: [PSUBS-MAILIST] Zinc coating
 Date: Sat, 2 May 2015 03:31:12 +0000 (UTC)

 Brian,if
 you blast the outside tomorrow won't you have to coat it
 immediately with a primerto prevent rust? I might be reading this
 wrong, but you hadn't sorted your paint sysytem
 yet.Alan

 From: Brian
 Cox via Personal_Submersibles
 <personal_submersibles at psubs.org>

 To: Personal
 Submersibles General Discussion
 <personal_submersibles at psubs.org> 

 Sent:
 Saturday, May 2, 2015 3:16 PM
  Subject: Re:
 [PSUBS-MAILIST] Zinc coating

 Hank ,  The compressor has a max
 pressure of 150 psi and a tank of 30 gal,  but it can only
 maintain a cfm of probably 80.  I got a fairly large
 blasting reservoir unit that is probably around 20 gals or
 so.  It's ok if I can't blast the whole side of the
 sub at once, I'll just go at the pace the unit can
 handle.  I've got this really hard slag in places where
 they formed the hemispheres, from the heat.  It's as
 hard as diamond !  If I hit is with a slag hammer it pops
 of, but in very small sections.  I tried grinding it and
 all it did was polish !  It'll come off but slowly. 
 I'm going to experiment with the blaster tomorrow.  I
 might try and rig a scuba facemask for back in the battery
 compartment later.

 Brian

 --- personal_submersibles at psubs.org
 wrote:

 From: hank pronk via
 Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion
 <personal_submersibles at psubs.org>
 Subject: Re: [PSUBS-MAILIST] Zinc coating
 Date: Fri, 1 May 2015 17:38:29 -0700

 Brian,
 What size compressor did you buy?  Sand
 blasting is a dirty job, but I love it, I find it
 relaxing.  Get yourself a good hood that has an air feed. 
 I did not know that silica sand is dangerous, that is all I
 use but I wear heavy coveralls and gloves.  My system is 80
 cfm at 80 psi and that seems plenty.  I never reuse my sand
 because it looses bite and like Alec says, it will plug your
 tip, but not until you have crawled inside a tight space and
 got comfortable :-)
 Hank--------------------------------------------
 On Fri, 5/1/15, Brian Cox via
 Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:

  Subject: Re:
 [PSUBS-MAILIST] Zinc coating
  To:
 "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
  Received: Friday, May 1, 2015, 7:55 PM

  I
  guess I
 should blast my viewports as well.   Gee I made
  them so smooth ! Brian

  ---
  personal_submersibles at psubs.org
 wrote:

  From: "swaters at waters-ks.com
 via
  Personal_Submersibles"
  <personal_submersibles at psubs.org>
  To:
  Personal Submersibles
 General Discussion
  <personal_submersibles at psubs.org>
  Subject: Re: [PSUBS-MAILIST] Zinc coating
  Date: Thu, 30 Apr 2015 20:38:21 -0500

  Not sure about yhe
  zinc coating. I used Macropoxy as the first
 coat and High
  solid poly as my second coat.
 I don't know if that
  helps, but it is
 what I
  did.Thanks,Scott Waters

  Sent from my
  U.S. Cellular® Smartphone

  -------- Original message

 --------
  From: Brian Cox via
  Personal_Submersibles
  <personal_submersibles at psubs.org>

  Date:04/30/2015  8:25 PM  (GMT-06:00)

  To: PSubs
  <personal_submersibles at psubs.org>

  Cc:

 Subject: [PSUBS-MAILIST] Zinc coating 

  All, Ok,
  I was going to take
 my pressure hull ( it's finished ,
  BTW)
 down and have an outfit zinc coat it but now I'm
  thinking that I should spend that money on a
 heavy duty air
  compressor and a sand
 blaster and do it myself.  Since
  I'm
 sure I will need to be recoating places where
  I'm doing thru hulls and such.  But my
 question is do I
  need to worry about the
 compatibility between the zinc
  coating and
 the epoxy that will on over the zinc ??  

 Should I put the zinc on the inside too ?   Are there
  different types of zinc coatings?  
   Brian

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