Archive for 'Programs'
Wipe or Sweep with Cloth Held in Hand
Posted on 15. Mar, 2009 by charles frenzel.
Wipe or Sweep with a Cloth held in a hand Make a bundle of cloth in your hand. Swipe the dry cloth across the surface. Make one swipe, up or down or sideways with the cloth touching the surface. Try to avoid pressing the fingers against the surface. The following four pictures are examples of […]
Continue Reading
Methodology: Be Consistent!
Posted on 15. Mar, 2009 by charles frenzel.
Methodology- BE CONSISTENT What ever method you chose -BE CONSISTENT! Wipe or Sweep with a Cloth around a brush Develop a consistent routine Use consistent materials Use a consistent viewing angle and lighting. Interpretations must have clean agreement between the coatings manufacturer, person doing the work (contractor), person accepting the work (owner), and the […]
Continue Reading
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 […]
Continue Reading
Lighting and Angle of Light Source
Posted on 15. Mar, 2009 by charles frenzel.
Lighting and Angle of Light Source Illumination is critical. Use as a standard Reference Document SSPC Guide 12 “Guide for Illumination of Industrial Painting Projects” The visual guides do not show the effect of the angle of the light source. SSPC Technology Guide No. 12 recommends an illumination of 50 foot candles minimum to 200 […]
Continue Reading
VIS Photos for Flash Rust
Posted on 15. Mar, 2009 by charles frenzel.
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. 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 […]
Continue Reading
VIS Guides for Visual Cleanliness
Posted on 15. Mar, 2009 by charles frenzel.
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. A section was cleaned with hand-held lances over a period of 3 days. Then […]
Continue Reading
VIS Guides and Initial Conditions
Posted on 15. Mar, 2009 by charles frenzel.
Use of VIS Guides for Initial Condition Determine the initial condition of the steel before the flash rust forms. Initial condition is illustrated as painted or unpainted steel. Select a photograph that is similar to the initial condition The inspector and the contractor should be aware that the initial condition of the steel can vary […]
Continue Reading
Use of VIS Guides
Posted on 15. Mar, 2009 by charles frenzel.
Use of VIS Guides Distance from the surface will affect your judgment. If you’re too far away, you won’t be able to see through the flash rust in order to determine the difference between “steel substrate may be observed” [Light flash rust] and “obscures the original steel surface” [Medium flash rust]. Heavy flash rust simply […]
Continue Reading
Field Tests for Quantification
Posted on 15. Mar, 2009 by charles frenzel.
Field Tests to Evaluate the Quantity of Flash Rust The wipe and tape tests are subjective and require interpretation by the inspector. The interpretation can be difficult at first, but become simple with practice. Look at the FLASH RUST Assess the volume by observation Wipe and/or Tape Three Methods of Wiping • Hand Wipe with a […]
Continue Reading
Classification of Flash Rust
Posted on 15. Mar, 2009 by charles frenzel.
Light Flash Rust Light (L) flash rusted surface: A surface that, when viewed without magnification, exhibits small quantities of a rust layer through which the steel substrate may be observed. The rust or discoloration may be evenly distributed or present in patches, but it is tightly adherent and not easily removed by lightly wiping with […]
