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
 
RBW Enterprises, Inc.
 
Robotic Blasting and Painting
 
When using the FasterBlaster and FasterPainter, blasting and painting can be conducted simultaneously. View the video for a full explanation of the operation.
 

 
DeFelsko Corporation
 
PosiTector SHD Shore Hardness Durometer
 
PosiTector SHD measures the hardness of non-metallic materials. Features a measurement timer, auto ignore mode and internal memory. Shore A or D available.
 

 
Montipower, Inc.
 
The MBX Bristle Blaster
 
Get a 2.7 to 3.3 mil profile and a Near White Metal Clean. For info visit www.mbxit.com or call 877 629-8777
 

 
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
 

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

 
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
 

 
PreTox Products - NexTec, Inc.
 
GOT LEAD? Specify Pretox System products
 
The ONLY Lead Stabilizer Compatible with All Paint Removal Methods. Works with all Blast Media: Grits | Recyclable Abrasives | CO2 | Water | Power Tools | Etc. Call Dave Steffen at 800.338.8296.
 

 
Fischer Technology Inc.
 
MP0R with rotating display screen
 
Automatic rotating display screen just like your smart phone. Click for Video
Call 800-243-8417
 

 
Novatek Corporation
 
Novatek Corporation, Dustless Coatings Removal
 
Strip, clean and profile all dust free! Comply with new lead standards. Contact today: (866) 563-7800
 

 
Polygon
 
POLYGON - Temporary Humidity Control
 
We specialize in innovative climate control solutions for industrial painting, utilizing alternative energy sources and combining desiccants with heating or cooling.
 

 
 
 

Technology Publishing Co., 2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951

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