Free 186 More Best Homemade Tools eBook:  
Get tool plans

User Tag List

Results 1 to 10 of 10

Thread: PosiPen magnetic thickness coating gauge - video

  1. #1
    Jon
    Jon is online now Jon has agreed the Seller's Terms of Service
    Administrator
    Supporting Member
    Jon's Avatar
    Join Date
    Jan 2012
    Location
    Colorado, USA
    Posts
    26,373
    Thanks
    8,090
    Thanked 40,142 Times in 11,740 Posts

    PosiPen magnetic thickness coating gauge - video

    PosiPen magnetic thickness coating gauge. Around $225 on Amazon.

    15-second video:


    186 More Best Homemade Tools eBook

  2. The Following User Says Thank You to Jon For This Useful Post:

    Scotsman Hosie (May 5, 2019)

  3. #2
    Supporting Member
    Join Date
    Sep 2012
    Location
    Hinchinbrook QLD
    Posts
    323
    Thanks
    44
    Thanked 138 Times in 84 Posts
    Surely that would require knowing the base metal composition at least.

    2,000+ Tool Plans

  4. #3
    Jon
    Jon is online now Jon has agreed the Seller's Terms of Service
    Administrator
    Supporting Member
    Jon's Avatar
    Join Date
    Jan 2012
    Location
    Colorado, USA
    Posts
    26,373
    Thanks
    8,090
    Thanked 40,142 Times in 11,740 Posts
    Testing coating thickness with a holiday detector.


  5. The Following 4 Users Say Thank You to Jon For This Useful Post:

    baja (May 4, 2019), Moby Duck (May 4, 2019), Scotsman Hosie (May 5, 2019), Seedtick (May 3, 2019)

  6. #4
    Supporting Member Toolmaker51's Avatar
    Join Date
    Feb 2016
    Location
    Midwest USA
    Posts
    5,334
    Thanks
    7,044
    Thanked 3,011 Times in 1,900 Posts

    Toolmaker51's Tools
    Quote Originally Posted by 12bolts View Post
    Surely that would require knowing the base metal composition at least.
    Generally [any instance of my use] the PosiPen is ferrous materials. There are digital meters in the same price range measuring thickness on ferrous or non-ferrous with paints, plating or certain coatings.
    Very broadly used in many industries, especially being an NDT [non-destructive test]. Electromagnetic induction is used for non-magnetic coatings on ferrous substrates such as steel. Eddy current principle is used for non-conductive coatings on non-ferrous metal substrates.
    https://www.elcometer.com/en/coating...ess-gauge.html
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

  7. The Following User Says Thank You to Toolmaker51 For This Useful Post:

    Scotsman Hosie (May 5, 2019)

  8. #5
    Supporting Member tonyfoale's Avatar
    Join Date
    Nov 2016
    Location
    Spain
    Posts
    1,599
    Thanks
    716
    Thanked 2,694 Times in 721 Posts

    tonyfoale's Tools
    Quote Originally Posted by Jon View Post
    Testing coating thickness with a holiday detector.
    What is a holiday detector? I know when I am on holiday, without any sparks.

  9. The Following User Says Thank You to tonyfoale For This Useful Post:

    Scotsman Hosie (May 5, 2019)

  10. #6
    Supporting Member tonyfoale's Avatar
    Join Date
    Nov 2016
    Location
    Spain
    Posts
    1,599
    Thanks
    716
    Thanked 2,694 Times in 721 Posts

    tonyfoale's Tools
    Quote Originally Posted by Toolmaker51 View Post
    There are digital meters in the same price range measuring thickness on ferrous or non-ferrous with paints, plating or certain coatings.
    For Xmas I got a digital ultra sonic thickness measurer. It works better than expected once I figured out how to use it properly. The documentation was naff. Where I could check measurements by other methods, calipers or mic, it proved to be quite accurate. It is an invaluable tool for checking thickness where you do not have access to both sides. It works on most metals and plastics. Some types of cast iron can not be measured due to reflections from voids and the carbon bits floating around.

  11. The Following User Says Thank You to tonyfoale For This Useful Post:

    Toolmaker51 (May 4, 2019)

  12. #7
    Supporting Member Moby Duck's Avatar
    Join Date
    Jan 2016
    Posts
    400
    Thanks
    1,270
    Thanked 206 Times in 131 Posts

    Moby Duck's Tools
    Don’t know if “holiday” is a generally used term, but in Naval terms it refers to gaps in the paint coating, big or small. They are looking for uncovered areas/pin holes in the paintwork.

  13. The Following 2 Users Say Thank You to Moby Duck For This Useful Post:

    tonyfoale (May 4, 2019), Toolmaker51 (May 4, 2019)

  14. #8
    Supporting Member Toolmaker51's Avatar
    Join Date
    Feb 2016
    Location
    Midwest USA
    Posts
    5,334
    Thanks
    7,044
    Thanked 3,011 Times in 1,900 Posts

    Toolmaker51's Tools
    Quote Originally Posted by Moby Duck View Post
    Don’t know if “holiday” is a generally used term, but in Naval terms it refers to gaps in the paint coating, big or small. They are looking for uncovered areas/pin holes in the paintwork.
    That is accurate; though coating holidays in our esteemed USN detectable by eye, being some portion the width of a roller or brush. On new work holidays are prevalent on texture of welds and seams. Later, they'll weep tiny trails of rust, undermining the point behind surface protection. But they have a ready supply of additional paint chippers and painters.

    Industrially, especially manufactured products, inspection methods for holidays is substantially smaller. The charged brush is a low voltage method, but not so visible in normal lighting. Company made hydraulic reservoirs for military aircraft tow vehicles, a step shaped box with MIG welded ends and fittings. Before powder coating, welds were 100 percented @ 30 PSI and sudsy water; ~8' of weld and 6-7 fittings. They also were examined visually for weld residues, pitting, voids etc. The same areas were sparked for holidays after olive drab paint. Powder paint is highly effective, but obstructions and pockets are challenges. Residues and pitting don't receive paint well, mainly being non-conductive impurities.
    Adhereing to MIL-SPEC requirements keep a lot of fabricators out of that work; only a few prosper. Built in; not bolted on.
    Achieves what ISO-9000 series certifications of "Model for quality assurance in production, installation and servicing." wishes it could. Real quality results, not empty 'assurance' via administrative clowns.
    Last edited by Toolmaker51; May 4, 2019 at 10:14 AM. Reason: Visual inspection detected 1 little 's' missing.
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

  15. #9
    Supporting Member olderdan's Avatar
    Join Date
    Jun 2016
    Posts
    793
    Thanks
    1,463
    Thanked 1,583 Times in 470 Posts

    olderdan's Tools
    Quote Originally Posted by Moby Duck View Post
    Don’t know if “holiday” is a generally used term, but in Naval terms it refers to gaps in the paint coating, big or small. They are looking for uncovered areas/pin holes in the paintwork.
    I have heard decorators use that term but did not know it had naval origins.

  16. The Following User Says Thank You to olderdan For This Useful Post:

    tonyfoale (May 4, 2019)

  17. #10
    Supporting Member Scotsman Hosie's Avatar
    Join Date
    Apr 2017
    Location
    Salt Lake City, UTAH
    Posts
    359
    Thanks
    4,937
    Thanked 85 Times in 60 Posts

    Scotsman Hosie's Tools
    Quote Originally Posted by tonyfoale View Post
    What is a holiday detector? I know when I am on holiday, without any sparks.
    Essentially a manual Hi-Pot Tester. In this iteration, used to check full coverage and thickness of coatings – on weld seams.



    2,000+ Tool Plans

  18. The Following User Says Thank You to Scotsman Hosie For This Useful Post:

    Toolmaker51 (May 5, 2019)

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •