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  Technical
     
  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. 

 

 

 
 
 

 

 

 

 

Envirobot

Magnetic Air-gap

UHP Waterjetting Technology 

 

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