Summary of Major Points- Flash Rust Project NSRP
Posted on 16. Mar, 2009 by charles frenzel in Flash Rust, NSRP
NSRP Flash Rust Project Metric Table, Control of Amount
Summary of Major Points:
1. Flash Rust is the rust that occurs from the time the waterjetting process starts to the time the water used for the waterjetting process dries.
2. Control the quantity of Flash Rust by Project Planning
• During Removal Process
• As Water is drying
• Keep the drying time to a minimum.
3. Remove excess loose Flash Rust prior to Painting
4. Based on the subjective methods, Flash Rust is classified as
• None
• Light
• Moderate
• Heavy
The following metric table was developed by Pete Ault, Elzly Technology Corporation. Click Table to enlarge.
Table of Metrics used in Flash Rust
ALL of the VISUAL GUIDES are used in the SAME WAY!
Look at the flash rust
• straight on,
• within arm’s length,
• in good lighting,
• prior to painting.
Allow time to remove, if necessary, excess loose flash rust prior to painting
Look at the surface and decide if you can see through the rust or if it obscures the surface. Make sure that the rust is not splotchy black.
Look at the color. Color can vary depending on the type of steel. The color is affected by the age and type of steel and, in the field, certainly might appear differently than the descriptive terms. Current language being adopted by NACE and SSPC will remove the COLOR language.
Determine Quantity of loose rust dust. Lightly wipe the surface with a cloth.
The methods to evaluate Flash Rust are Subjective.
• Visual Appearance and
• Assessment of amount of Loose Dust
Cloth Wipe in hand
Cloth Swatch in hand
Cloth around a Brush
Tape
