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

August 11 - August 16, 2010

Is there a definitive relationship between mechanical properties of coatings (such as elongation and tensile strength) and crack-bridging capability?


Selected Answers

From Adam Backhaut of Diamond Vogel Paints on November 23, 2010:
Coatings are formulated with different technologies, such as alkyds, polyols, acrylics, epoxies, etc. Each resin system has different wavelengths and flexibility properties. Technologies are formulated for specific performance. Some coatings may be very flexible but not durable, and some may be rigid and durable, etc… Flexibility and tensile strength may not always correlate the durability or mechanical properties of the coating. Chances are, if the coating fails right way, the material was not designed for the application. It is important to understand the use of the product so the proper materials are used, which will help the long-term durability of the substrate.

From Bart Wilbanks of CPS Color on August 12, 2010:
No. Coatings having both great and poor mechanical properties can bridge a surface crack in the substrate. This ability has litte dependence on elongation and tensile strength, but relates more to the flow and leveling during the film formation. However, the bridge's ability to sustain will depend on the elongation and tensile strength of the coating.

From Subrahmanya S of Asian Paints Ltd on August 11, 2010:
Yes, both these properties have a relationship with the crack-bridging ability of a coating. Development of a crack is due to both internal and external stress developed in the coating. If the total stress developed, which is very difficult to know, is less than tensile strength, then chances of crack development are very minimal. On the other hand, if the coating maintains its elongation (should be very high number) during its service life, then the crack bridging ability will be good.

Please sign in to submit your answer this question    


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

Advertisements
 
PPG Protective and Marine Coatings Group
 
We Protect and Beautify the World
 
PPG is widely recognized as a world leader in protective and marine coatings, developing innovative, cutting-edge products and services.
 

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

 
Axxiom Manufacturing
 
Schmidt Improves Conversion Kits
 
Schmidt's conversion kits turn out-of-date blast pots into high quality, efficient blasters. Quick, easy to install with step by step instructions.
Call 1-800-231-2085
 

 
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.
 

 
Strategic Materials Inc.
 
Crushed Glass Abrasives
 
Competitively priced, high-performing crushed glass abrasive. Available today. Toll-free 1-866-775-6226
 

 
W Abrasives
 
Optimize your blasting process and operations!
 
Blasting is a complex process that goes above and beyond the simple question of the shot used, no matter how innovative and efficient it is. W Abrasives is there to help.
 

 
Sherwin-Williams
 
Sherwin-Williams General Polymers Resinous Flooring App
 
Our coatings and linings expertise available 24/7, allowing you to explore the Sherwin-Williams systems best suited for your flooring needs. Android Users Click here to Download the app today!
 

 
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
  •  

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

     
    Bullard
     
    Upgrade with the Bullard GenVX
     
    Click here for your blast helmet.
     

     
     
     

    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