Flash Rust

Swatch Wipe

Posted on 15. Mar, 2009 by charles frenzel.

Swatch Wipe
NACE Level 3 CIP Barry McCoy from Surface Technologies Corp. contributed this “Swatch” test as it is consistent from project-to-project and easily taught.
 Make a “swatch” or wad of the dry cloth. Tape the tail to make a handle.
 Lightly wipe the swatch once over the surface.  This path was about 3 inches (7.5 cm)
 Be consistent [...]

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Summary of Hand Wipe

Posted on 15. Mar, 2009 by charles frenzel.

Summary- Hand Wipe

 Advantage of holding cloth in hand and wiping. It is easy.
 Disadvantage – it is difficult to maintain an even pressure and keep the cloth on the surface.

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Example of Moderate Flash Rust

Posted on 15. Mar, 2009 by charles frenzel.

Example of moderate flash rust.
Visually the loose Moderate Flash rust appears to be a little denser than light. The surface is obscured. When wiped, the loose dust is easily transferred. Upper left is the footprint of a tape test. There is no black rust under the lighter rust.

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Procedure for Evaluation in VIS-4

Posted on 15. Mar, 2009 by charles frenzel.

Procedure for Evaluation in VIS-4

When do you evaluate the Flash Rust?
 Flash rust and the substrate (surface) condition are evaluated at or before the time of painting. 
 Look at the Project Documents to determine the length of time that can lapse between inspection points and paint application.
 Plan your inspection of flash rust so that the paint can [...]

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