PaintSquare.com


The First Word in Protective & Marine Coatings

A Product of Technology Publishing / PaintSquare
JPCL | PaintSquare News | Durability + Design | Paint BidTracker

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

Sauereisen, Inc.
Experts in Corrosion

A Leader in the manufacture of speciality cements and corrosion-resistant materials of construction. www.sauereisen.com


EDCO - Equipment Development Co. Inc.
American Manufacturing

Is coming back, is more competitive, and is higher
in quality. Well EDCO never left, we never lost our competitiveness, and we
have always maintained
our high level of quality.
Call 800-638-3326 or visit
us @ edcoinc.com


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


DeFelsko Corporation
PosiTector Dew Point Meter

Measures and records
environmental conditions
during surface prep and
painting. 4 Models
Available – Standard
or Advanced features,
Built-in or Separate probe.


ITW Binks
Built for Tough Jobs

From Epoxies to Urethanes to other high solid coatings, the new Binks Airless 75 delivers a great finish using an ergonomic design. Visit binks.com for more information.


Polyval Coatings
Polyflex® Polyurea Linings

exhibit outstanding versatility in use; providing abrasion resistance, superior seamless waterproofing and high-chem corrosion protection. www.polyflexlinings.com


Manus Abrasive Systems, Inc./Mod-U-Blast Mfg.
Manus Abrasive
& Mod-U-Blast Mfg

stock several handy tools to accomplish a wide range of internal pipe blasting/cleaning.
Dealer inquiries welcome.

 
 
 
Technology Publishing

The Technology Publishing Network

The Journal of Protective Coatings & Linings (JPCL) PaintSquare
Durability + Design Paint BidTracker JPCL Europe

 
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
 

© Copyright 2000-2014, 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 webmaster@paintsquare.com