Flash Rust » visual 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=3.2.1 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 VIS Guides for Visual Cleanliness http://flashrust.org/2009/03/15/vis-guides-for-visual-cleanliness/?utm_source=rss&utm_medium=rss&utm_campaign=vis-guides-for-visual-cleanliness http://flashrust.org/2009/03/15/vis-guides-for-visual-cleanliness/#comments Sun, 15 Mar 2009 16:52:15 +0000 charles frenzel http://flashrust.org/?p=239 Use of VIS Guides for Visual Cleanliness


      Immediately after the cleaning, before the surface has flash rusted, (it might still be wet), evaluate the degree of Visual Cleaning.
The visual cleaning evaluation often occurs while the surface is still wet.

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Courtesy Dr. Lydia Frenzel

A section was cleaned with hand-held lances over a period of 3 days.  Then the jetters moved to another section.  The visual cleanliness was evaluated at the time of coatings removal. The flash rust was evaluated on the day that it was painted.

Example of Visual Cleanliness (Thorough Cleaning) (Below).
Example of Moderate Flash Rust – at time of paint application.
Photo Courtesy of Dr. Frenzel

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Conditions at time of Cleaning/Conditions prior to Cleaning

Example of Visual Cleanliness (Thorough Cleaning).
Example of Moderate Flash Rust – at time of paint application

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