| Connect Follow us on Twitter Like us on Facebook
About | Subscribe | Advertise


Learn while you earn.

Problem Solving Forum

| More

April 7 - April 11, 2014

When a food plant runs 24/7, even during coating maintenance, tiny airborne food particles can contaminate a prepared surface. How do you identify, prevent and/or remove such contamination before coating?

More items for Surface Preparation

Selected Answers

From virani jagdish of MHI on April 29, 2014:
Non-visible dust can be detected by using a dust-level tape test.

From David Cobbett of B-Rite Coating Inspections on April 24, 2014:
When I was overseeing a dousing tank at a nuclear site, I was looking at the previous coating failure and found as many as 5 coats could be distinguished, with a fine crystal-like film between each coat. So there was contamination from start to finish.  Fine airborne particles from other parts of the plant were driven upward because of the heat to the top of the reactor where the dousing tank was located. To overcome this problem, we fabricated dust walls using 2-inch PVC pipe and 40-mil plastic sheets, then sealed the walls with tape once an area was squared off, forming an inclosure. Two holes are necessary on both outer walls with two air-moving units. The intake runs at 70%, the outtake at 100%, creating a negative air space of about 3 atmosphere and achieving a dust-free environment.

From Warren Brand of Chicago Coatings Group on April 8, 2014:
Of course, the details of the materials being processed are critical. We worked at a large facility on a  flour silo. In that case, we took normal precautions for dust and isolated the work area. I think I would focus on isolating the work area. Testing or identifying contaminants would depend on the specific facility and materials involved. In another case, we worked at a facility that made powdered detergent. The dust was so incredibly fine that it was impossible to see. It was just luck that one of the blasters noticed a slight sheen on his blasted surface, which made us  realize that this invisible dust had contaminated the substrate.

Please sign in to submit your answer this question    

Tagged categories: Food Processing Plants; Maintenance coating work; Surface preparation

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

NLB Corporation
VacLance cleans up as you do surface preparation

Add vacuum recovery to any NLB rotating water jet lance with a VacLance attachment and vacuum source. Model DM32283 works vertically, horizontally and in corners.

Montipower, Inc.
The MBX Bristle Blaster

Get a 2.7 to 3.3 mil profile and a Near White Metal Clean. For info visit or call 877 629-8777

Advanced Recycling Systems

Recycling Machines, Dust Collectors, Rapid Deployment units are time-tested and approved for the rugged industrial environment. Contact ARS today!

Axxiom Manufacturing
Schmidt Introduces
the New miniBRS

Reduced in size, it is incredibly easy to maneuver and operate! The perfect alternative to larger blast & recovery units when project space is limited.
Call 1-800-231-2085

CS Unitec
Peening Preparation Tools

CS Unitec’s hand-held scarifiers are an ideal alternative to small-area shot blasting for cleaning and preparing concrete & metal surfaces.


Download the free app for BLACK BEAUTY® Abrasives. Explore all the features from the palm of your hand.
Toll Free: 1-888-733-3646

Clemco Industries Corp.
Powerful Protection in a Small Package

Mounts inside blast helmet, alerts operator to dangerous breathing-air condition by audible, visual, and vibratory alarms. Easily calibrated, battery operated.

Absolute Equipment/Grand Rental Station
Portable Power from Absolute Equipment

•Lighting Systems
•Light Compaction
Sales • Rental • Service
Call 1-866-931-6655
Over a century of
providing excellence.

Monti Tools, Inc.

Surface cleanliness of SSPC-10 | Anchor profile up to 4.7 mils | Removes corrosion & coatings | ATEX approved for zone 1 | | 832-623-7970

Industrial Vacuum Equipment Corp.
Hurricane Vacuums
& Dust Collectors

Vacuum and dust collector hose, filters and related accessories.

Technology Publishing

The Technology Publishing Network

The Journal of Protective Coatings & Linings (JPCL) PaintSquare
Durability + Design 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   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us

© Copyright 2000-2015, Technology Publishing / PaintSquare, All rights reserved
2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951; Tel 1-412-431-8300; Fax 1-412-431-5428; E-mail