Flash Rust » comparator http://flashrust.org The real story of what flash rust is and how to cope with it. Mon, 11 Jul 2011 16:44:22 +0000 en hourly 1 http://wordpress.org/?v=3.3.2 Pressure Sensitive Tape Test for Quantity http://flashrust.org/2009/03/16/pressure-sensitive-tape-test-for-quantity/?utm_source=rss&utm_medium=rss&utm_campaign=pressure-sensitive-tape-test-for-quantity http://flashrust.org/2009/03/16/pressure-sensitive-tape-test-for-quantity/#comments Mon, 16 Mar 2009 19:40:50 +0000 charles frenzel http://flashrust.org/?p=316 Pressure Sensitive Tape Test- for Quantity


The Pressure Sensitive Tape Test described by Hempel is a modification of ISO 8502-3 (Pressure Sensitive Tape test for dust) and is not mentioned in VIS-4.  The tape test can be used as a permanent record.  If lint deposition is a concern, the project 075-tape-test-on-heavy-flash-rust-after-pressure-washspecification may require use of a different technique to determine the level of flash rust, such as the pressure-sensitive tape test. Those responsible for establishing the requirements and those responsible for performing the work can agree to the use of a different technique to determine the level of flash rust

Place a piece of tape (as specified in ASTM D 3359) in a length of at least 5 cm (2 in) on the surface and rub thoroughly with a fingertip–not a nail–to make the tape adhere firmly.  Peel off the tape and place it on a piece of white paper for reference. Repeat this process 9 additional times (for a total of 10 tests) using a fresh piece of tape each time and apply the tape to the same spot.  Assess the appearance of the tape and the surface.

The results from the pressure sensitive tape test lead to the same conclusions as the tape tests.  For further details or training on this item, contact Dr. Frenzel.

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Tape Test from a Moderate Flash Rust (MFR) Surface (Below).

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]]> http://flashrust.org/2009/03/16/pressure-sensitive-tape-test-for-quantity/feed/ 0 Different Areas with Brush Test http://flashrust.org/2009/03/15/different-areas-with-brust-test/?utm_source=rss&utm_medium=rss&utm_campaign=different-areas-with-brust-test http://flashrust.org/2009/03/15/different-areas-with-brust-test/#comments Sun, 15 Mar 2009 23:58:09 +0000 charles frenzel http://flashrust.org/?p=279 Comparative results:

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Heavy Flash Rust formed from water coming from holes.
Different section where Light, moderate, and heavy flash rust had formed in close proximity.

 

 

 

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Left to right, Light, Moderate, Heavy. Brush tests taken at the same time from three different areas.

]]> http://flashrust.org/2009/03/15/different-areas-with-brust-test/feed/ 0 VIS Photos for Flash Rust http://flashrust.org/2009/03/15/vis-photos-for-flash-rust/?utm_source=rss&utm_medium=rss&utm_campaign=vis-photos-for-flash-rust http://flashrust.org/2009/03/15/vis-photos-for-flash-rust/#comments Sun, 15 Mar 2009 17:00:44 +0000 charles frenzel http://flashrust.org/?p=242 Use of VIS Photo for Flash Rust


       Prior to painting, compare the flash-rusted surface with the flash rust photographs.
Wipe or use tape as a further determination.

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Moderate Flash Rust

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Moderate Flash Rust

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Light Flash Rust

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Light Flash Rust

Photos above Courtesy of Pete Ault and Steve Cogswell, 2007 NSRP Project
In this case, the two reference surfaces are very similar. Both panels had a metallic sheen.
      Wipe or use tape as a further determination.
For these plates, the wipe test distinguished between light and moderate.

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