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

 

Advertisement

PaintSquare


Problem Solving Forum

| More

January 14 - January 20, 2013

Is the MEK rub test a conclusive test to check the cure of IOZ coatings?

More items for Quality Control


Selected Answers

From Simon Hope of Bilfinger Salamis on January 16, 2013:
     MEK rub test is only subjective as proof of cure for IOZ coatings. The test is only valid for the actual area tested and can only be applied to the whole item by extrapolation of result. Confidence in the result can vary wildly, depending on time, humidity and temperature, as the curing mechanism of IOZ is totally dependent on the integration of water into the silicate precursor to create the matrix to support the metallic zinc. Hence, the best advice is that once touch dry, fresh water washing enhances the cure mechanism. High humidity and water washing will give confidence and MEK rub then gives verification.

From wenbo chen of International Paint on January 15, 2013:
     Though ASTM D 4752 describes a standard test method for measuring MEK resistance of IOZ by solvent rub, we always use a coin test in the field. The MEK test is more likely a lab test.

From Chuck Pease of MMI Tank on January 14, 2013:
     Not conclusive, as Dave mentioned. Only a estimation. This requirement is per ASTM D 4752.  Note that in the 4th paragraph, line 2, they call it an estimation.

From Dipesh Vyas of CARBOLINE on February 15, 2013:
     My field expereince reveals that the coin test is the best, easiest,quickest most and reliable test to verify curing of spray- applied IOZ film. The MEK rub test, if not performed by a skilled person, can have misleading  results because spray-applied IOZ always has some loose zinc dust ( overspray), and if not cleaned will react with MEK  In first 5 passes, only satin will be noticed .

From Tom Schwerdt of Texas Department of Transportation on January 22, 2013:
     Wenbo, the MEK rub is certainly a field test - all you need is a rag, MEK and a finger! (Okay, a glove would be nice to have, too.) The MEK rub is more conclusive than the coin test. The only truly conclusive test is in the lab - generally a force cure in a sealed vial, followed by gas chromatography.

From Dave Lisnock of Arizona State University W.P. Carey Facilities on January 14, 2013:
     No, it is not  a conclusive test. The only true test is a lab test.

From Tom Schwerdt of Texas Department of Transportation on February 19, 2013:
     Dipesh - how crisp is the edge of your coin? How much force are you using? At what angle are you holding the coin? The coin test is at least as variable (if not more so) than the MEK rub test.

Please sign in to submit your answer this question    

Tagged categories: Curing; Performance testing


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

Advertisements
 
HoldTight Solutions Inc.
 
NO FLASH RUST - NO CONTAMINANTS
 
Our HoldTight®102 salt remover & flash rust
preventer prevents flash
rust by removing surface contaminants. Contact us
for your nearest distributor.
(800) 319.8802 sales@holdtight.com
 

 
Fischer Technology Inc.
 
Highly Repeatable Ultrasonic Wall Thickness Gauge
 
Detect corrosion by monitoring wall thickness with the compact UMP series from Fischer.
 

 
SEMicro Division, M.E. Taylor Engineering, Inc.
 
Coatings Adhesion Testers
 
The PATTI® accurately measures the bond strength between coating & substrate. Outfitted properly, the surface can be rough, porous, or curved & >10K psi strong!
 

 
Industrial Vacuum Equipment Corp.
 
Hurricane Vacuums
& Dust Collectors
 
Vacuum and dust collector hose, filters and related accessories.
IndustrialVacuum.com
 

 
DeFelsko Corporation
 
PosiTector SST Soluble Salt Tester
 
Measures the concentration of soluble salts on metal surfaces. Use with all Bresle patch types including the reusable, adhesive-free PosiPatch.
 

 
KTA-Tator, Inc. - Corporate Office
 
New KTA Pipeline Inspection Kit
 
• Defelsko standard memory body
• Positector FTS 0-250 mils, cabled dry film thickness probe
• NEW Positector Shore D hardness probe
• All essential inspection equipment!
Visit www.ktagage.com
 

 
Clemco Industries Corp.
 
Maximum Dust Suppression Systems Start at $14,950
 
The system comprises proven technology and equipment with user-friendly flexibility in mind. See it in action.
 

 
Bullard
 
Upgrade with the Bullard GenVX
 
Click here to learn how you can get a GenVX Helmet and Win.
 

 
CS Unitec
 
Remove Coatings, Corrosion & More!
 
For metal & concrete. Scalers, scabblers, deck hammers & scarifiers. Safe for hot work zones. Call our specialists: 800-700-5919.
Demo videos at www.csunitec.com.
 

 
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.
 

 
 
 

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   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us