PaintSquare.com
Follow us on Twitter Follow us on LinkedIn Like us on Facebook Follow us on Instagram Visit the TPC Store
Search the site

 

Problem Solving Forum

| More

May 6 - May 13, 2010

How does abrasive recycling affect cleaning rates when steel is blast-cleaned in the field?


Selected Answers

From OM PRAKASH JAT of TECH INTERNATIONAL SHARJAH HAMRIAH UAE. on March 5, 2015:
Recycling abrasives gives irregular profile with  a contaminated surface, which is one of the major causes of painting failure and low production rate. One more thing is that used abrasive is flying into powdery forms during blasting and is hazardous for the blaster's health, especially for their lungs.

From Barry Barman of Barry Barman & Associates on May 6, 2010:
Whether blast cleaning takes place in the field or in a shop (with centrifugal wheel machines), recycled abrasive media becomes contaminated and breaks down in size,such that the ratio of smaller sized particles in the work mix increases, thereby reducing cleaning efficiency. This necessitates the need to pass the abrasive through equipment that adequately removes fines and debris (“cleaning the media”). In the process, new, larger-sized media should be added back to keep the work mix in the proper ratio. Failure to do so will result in poor production rates and an excessively “dirty” and undersized abrasive media that will leave the steel with a shallow profile and contaminated with the same material that was initially removed from the steel.

From AJ van Rijsbergen of solublesaltmeter.com on May 7, 2010:
Recycling abrasive is environment friendly, which is, of course, a good thing. On the technical side, blasters and coating inspectors must be aware that the contamination level of the abrasive, especially the conductivity level, will increase during each recycle step. Eventually, a high conductivity level of the abrasive can be the cause for adding soluble salts to the blasted surface, which could exceed the allowed maximum level.

From Pieter van der Poel of Danieli Far East on May 7, 2010:
Depending on the initial size and type of the abrasive, after proper recycling with a recycling system to remove the dust, the remaining abrasive, reduced in size, would result in more abrasive particles impacting the substrate, thereby increasing the cleaning rates. However, the finer abrasive particles will reduce the profile, so a mixture of new abrasive should be added to the recycled abrasive. Further recycling would prove counterproductive in terms of cleaning rates due to the loss of mass of the finer particles (kinetic energy).

From HK SAXENA of BREDERO SHAW on May 6, 2010:
An improper working mix after recycling will reduce the profile. Also, dust levels will increase due to the finer particles in the recycled abrasive.

Please sign in to submit your answer this question    


Current PSF Question | Submit a PSF Question | Full PSF Archive

Advertisements
 
Blastox/The TDJ Group, Inc.
 
Blastox® - One Step Lead Abatement
 
Sandblast additive delivered to jobsite pre-blended to eliminate hazardous abrasive wastes. Why mix, meter or apply at the job-site? Blast with ease and
Let your painters paint!
1(800)-252-7869
 

 
Graco Inc.
 
Graco EcoQuip 2: Experience the Difference
 
While others claim their equipment is the same, none of them compare to Graco’s EcoQuip 2™ Vapor Abrasive® blasting line. Visit graco.com/ecoquip to learn more.
 

 
SSPC: The Society for Protective Coatings
 
http://www.sspc.org/
 
Join SSPC and Enhance
Your Career !
 

 
Carboline Company
 
New product: Carbozinc® 608 HB
 
Introducing a new high build zinc-rich primer that can save you time and money by eliminating the epoxy intermediate coat!
 

 
ABKaelin, LLC
 
ABKAELIN EH&S SERVICES
 
Programs/Training/Monitoring for Silica, Lead, Noise, Beryllium, Hexavalent Chromium, Cadmium, Hazardous Waste*PM10 & TSP-Lead Ambient Air Monitoring*SSPC C3/C5
 

 
Jotun Paints Inc.
 
Jotun Jotachar 1709
 
Mesh-free passive fire protection epoxy designed to protect against hydrocarbon pool fire scenarios for up to four hours as defined in the ANSI/UL1709 standard.
 

 
Monti Tools, Inc.
 
BRISTLE BLASTER® – THE ORIGINAL ONE
 
  • Abrasive blast with a power tool
  • Remove corrosion, mill scale and coatings
  • Cleans & roughens
  • Meets SSPC-SP 10 / NACE No. 2
  • Profile up to 4.7 mils
  • ATEX Zone 1
  •  

     
    Modern Safety Techniques
     
    Modern Safety Techniques
     
    With our unique LTCat, we can help to provide clean, safe breathing air to your workers. Take a look at our Breathing Air Systems, we supply at least twice as much charcoal as our competitors! Modern
     

     
    SABRE Autonomous Solutions
     
    Productivity
     
    Personnel are free to do other tasks while the ALPHA1 does the “dirty work”.
     

     
    Fischer Technology Inc.
     
    TSA Coatings on Stainless Steel
     
    Fischer’s Phascope PMP10 and ESD20TSA probe are incredibly accurate and easy to use.
     

     
     
     

    Technology Publishing Co., 1501 Reedsdale Street, Suite 2008, Pittsburgh, PA 15233

    TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL webmaster@paintsquare.com


    The Technology Publishing Network

    Durability + Design PaintSquare the Journal of Protective Coatings & Linings Paint BidTracker

     
    EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
    REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
    MORE:      About PaintSquare.com   |   Privacy policy (Updated 1/8/2018)   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us