Using water is the
cleanest media for preparing a surface for paint
White Papers and
Articles provided here discuss the features and benefits of
using ultra high water pressure for coatings removal on steel
prior to painting.
Grit Blasted Surface
Pits and crevices
evident from abrasive cleaning on magnified metal surface.
Rust products can be hidden in these metal folds preventing
proper coating adhesion of the substrate.
Water Blasted Surface
Same magnification
metal surface using UHP waterjet cleaning. The substrate
is without crevices and the surface is clean and ready for
paint.
Photographs courtesy of L.M.
Frenzel
A Semi_Autonomous Robot for
Stripping Paint from Large Vessels
By Bill Ross, John Bares,
Chris Fromme
Carnegie Mellon University
Stripping
coatings and corrosion from large ships has become a serious
problem. Consider that a typical super tanker has over
30,000m2
of exterior hull surface that must be stripped or swept (a
partial stripping of loose coatings) at least once every five
years.More...
Effects of Waterjet Cleaning on Surface and Preparation
By Lydia M. Frenzel, PhD
This
extraordinary picture of a single water drop shows why
researchers say a 100-micron diameter water droplet appears to
hit the surface as a 5-10 micron particle. On the
contrary, a 100-micron solid abrasive (4 mil, 100 mesh) cannot
physically get into a hole less than 100-micron diameter. So
that pit, or crack remains uncleaned... More...
Posted with permission
of Lydia Frenzel, PhD Advisory Council
Comparison of Secondary Surface Preparation over Waterjetted
Surfaces and Effects on Coating Performance
By
Wayne McGaulley, William Shepperson, Fred Berry
The purpose of this
study is to investigate the performance of coatings over smooth
water jetted surfaces (on a macro level) compared to the
performance of surfaces with a measurable anchor tooth profile
achieved by secondary mechanical surface preparation methods.
More...
Posted with permission of the
authors
Flash Rusting: Characterization and Effect
on Coating Performance
Compared to the industry
standard of abrasive blasting, waterjetting eliminates hazardous
airborne pollutants, airborne dust that can damage or foul
shipboard mechanical systems, and abrasive cleanup and disposal.
In addition, the technology allows adjacent work by other
trades. More...
Posted with permission of the JPCL, Similar
articles are available online at paintsquare.com
Removal by Grit or by UHP
Waterjetting
By Lydia M. Frenzel, PhD
In Mid May
2008, I got two separate inquiries about "How much metal will
UHP waterjetting remove compared to dry blasting?" In each
case, the owner was looking at corroded areas and didn't have a
protocol or specification for UHP waterjetting for corrosion
removal. More...
Posted with permission
of Lydia Frenzel, PhD Advisory Council
One Minute Video Demonstration
Envirobot™ Coatings Removal on Hull
Undersides
Envirobot™ working inverted, on the bottom of Royal Caribbean
Lines cruise ship,
Radiance of the Seas at the Grand Bahama Shipyard in April 2008
for coatings removal.
