Menu
Search
Filters
Close
Menu

Celebrate World Corrosion Awareness Day with 20% off eCourses and eBooks with code WCAD2024 at checkout!

(Inspection) Adhesion Testing: How to Make It Stick in Assuring Coating Performance

Picture for Conference Proceedings 2021-ALL Papers
Available for download

It has become common practice for specification writers to require minimum tensile pull-off adhesion strength values as part of the acceptance criteria for protective coating work for concrete substrates.  These values are convenient for specifiers because a minimum number provides a black and white basis upon which to define success versus failure. But there is much more to performing and evaluating adhesion testing than a hard and fast number.

Product Number: 63-COAT_DEC21
Author: Randy Nixon / Kirk Shields,
Publication Date: 2021
Industry: Coatings
$0.00
$20.00
$20.00
  • Product is unavailable

It has become common practice for specification writers to require minimum tensile pull-off adhesion strength values as part of the acceptance criteria for protective coating work for concrete substrates.  These values are convenient for specifiers because a minimum number provides a black and white basis upon which to define success versus failure. But there is much more to performing and evaluating adhesion testing than a hard and fast number.  The minimum pull-off value is widely specified without any consideration for substrate strength, surface profile, substrate conditions, the test positions, coating type, or coating thickness (project specific conditions).  What also gets missed with this practice are several essential quality considerations including:

 

  1.                   It’s a destructive test. 
  2.                   The failure plane or interface for the load fixture is generally of greater import than the pull-off strength value itself.
  3.                   The appropriate test standard is often not followed.
  4.                   What equipment was used in establishing an acceptance value? 
  5.                   Not knowing when to perform the tests, how to perform the tests, and how to interpret the results. 
  6.                   How frequent the tests will be performed, by whom, and what the overall acceptance criteria really should be. 

 

This paper will provide guidance on how to avoid these commonplace pitfalls. Using adhesion testing, not as a pass or fail Q.C. criteria in specifications, but rather as a properly executed Q.A. tool.

It has become common practice for specification writers to require minimum tensile pull-off adhesion strength values as part of the acceptance criteria for protective coating work for concrete substrates.  These values are convenient for specifiers because a minimum number provides a black and white basis upon which to define success versus failure. But there is much more to performing and evaluating adhesion testing than a hard and fast number.  The minimum pull-off value is widely specified without any consideration for substrate strength, surface profile, substrate conditions, the test positions, coating type, or coating thickness (project specific conditions).  What also gets missed with this practice are several essential quality considerations including:

 

  1.                   It’s a destructive test. 
  2.                   The failure plane or interface for the load fixture is generally of greater import than the pull-off strength value itself.
  3.                   The appropriate test standard is often not followed.
  4.                   What equipment was used in establishing an acceptance value? 
  5.                   Not knowing when to perform the tests, how to perform the tests, and how to interpret the results. 
  6.                   How frequent the tests will be performed, by whom, and what the overall acceptance criteria really should be. 

 

This paper will provide guidance on how to avoid these commonplace pitfalls. Using adhesion testing, not as a pass or fail Q.C. criteria in specifications, but rather as a properly executed Q.A. tool.

Product tags
Also Purchased
Picture for Coatings + Proceedings 2021-ALL Papers
Available for download

(Inspection) What Do You Really Need to Know to be a Good Coatings Inspector?

Product Number: 60-COAT_DEC21
Author: William D. Corbett
Publication Date: 2021
$20.00

The role of a Coating Inspector has evolved considerably over the past few decades, and the responsibilities have increased over what used to be a rather straightforward job: to verify that surface preparation and coating application meet the project specification requirements. Today there are week-long or multi-week basic and advanced coating inspection courses, specialty courses that are industry-specific (e.g., bridge, nuclear), courses that are substrate-specific (e.g., concrete coatings inspection) and even coating-specific (e.g., inspection of thermal spray coatings). 
Picture for Coatings + Proceedings 2021-ALL Papers

(Concrete) Relevant Testing When Coating Concrete Tanks and Structure

Product Number: 37-COAT_DEC21
Author: John Sierzega
Publication Date: 2021
$20.00

Inspection has always been a hot topic when it comes to coatings projects. There are some substrates that can be harder to specify due to not knowing without knowing which testing is relevant to specify and properly inspect the substrate and surface after it is coated. Concrete is probably the number one substrate that is confusing. This paper will dive into the testing that is relevant when specifying coatings for concrete tanks and structures. Whether it is how to properly check film build or whether or not an ASTM test is relevant, this paper will clear the waters and make specifying coatings for concrete tanks and structures easier.
Picture for Coatings + Proceedings 2021-ALL Papers

Ethics

Product Number: 78-COAT_DEC21
Author: Robert (Bob) Dahlstrom / Michael Hindmarsh
Publication Date: 2021
$20.00

Cleaning, coating, and the nondestructive testing (NDT) of corrosion-susceptible surfaces requires extensive manual labor, often at heights that can create dangerous occupational environments. Drones, also known as uncrewed/unmanned aerial vehicles or systems (UAVs, UASs), can be leveraged to perform some of these tasks, including cleaning and coating, while keeping workers safely on the ground.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support