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A Study on the Effect of Surface Profile on Pull-off Adhesion Strength Value of Organic Coatings

Picture for A Study on the Effect of Surface Profile on Pull-off Adhesion Strength Value of Organic Coatings
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Coatings have been used as a primary method to protect the substrate underneath from corrosion in various geographical environments. A diverse range of generic coating types are available to protect the metals in different corrosive environments. Selection of the right coating for a specific metallic substrate at given operating conditions and environment is key to avoiding any premature failures of coating.

Product Number: 51323-19225-SG
Author: Srikanth Kambhampati, Qing Cao, Varun Ghodkay, Hanan Farhat, Thunyaluk Pojtanabuntoeng
Publication Date: 2023
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$20.00
$20.00

Pull-off adhesion testing is a commonly used method to determine the coating adhesion strength. Relying on the pull-off adhesion testing technique to determine the coating adhesion strength is increasingly common due to its quantitative result. This study focuses on how the pull-off adhesion strength value of the coating is affected by the change in critical factors i.e. surface profile morphology (spherical, sharp & angular) and a range of surface roughness profile height (μm). Test sample surface was prepared to visually clean steel with diverse sizes and shapes of abrasives, coated with a 3 coat system. Pull-off adhesion testing was performed on the fresh coating and after exposing the coating to cyclic ageing test conditions adopted from ISO12944-9, Annex B. Additionally, electrochemical impedance spectroscopy (EIS) and surface characterization of abrasives using scanning electron microscopy (SEM) and cross sectional analysis of coating sample after ageing with SEM-EDS (Scanning electron microscopy-Energy dispersive spectroscopy) were also performed.

Pull-off adhesion testing is a commonly used method to determine the coating adhesion strength. Relying on the pull-off adhesion testing technique to determine the coating adhesion strength is increasingly common due to its quantitative result. This study focuses on how the pull-off adhesion strength value of the coating is affected by the change in critical factors i.e. surface profile morphology (spherical, sharp & angular) and a range of surface roughness profile height (μm). Test sample surface was prepared to visually clean steel with diverse sizes and shapes of abrasives, coated with a 3 coat system. Pull-off adhesion testing was performed on the fresh coating and after exposing the coating to cyclic ageing test conditions adopted from ISO12944-9, Annex B. Additionally, electrochemical impedance spectroscopy (EIS) and surface characterization of abrasives using scanning electron microscopy (SEM) and cross sectional analysis of coating sample after ageing with SEM-EDS (Scanning electron microscopy-Energy dispersive spectroscopy) were also performed.

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Picture for An In-Depth Investigation into the Causes of the Performance Variations of Liquid-Applied Pipeline Coatings on Different Types of Abrasives Prepared Surfaces
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An In-Depth Investigation into the Causes of the Performance Variations of Liquid-Applied Pipeline Coatings on Different Types of Abrasives Prepared Surfaces

Product Number: 51323-19561-SG
Author: Shan (Sherry) Rao
Publication Date: 2023
$20.00

Dry abrasive blast cleaning is a commonly used surface preparation method to achieve the necessary surface cleanliness and roughness for the application of high-performance protective coatings. The effectiveness of abrasive blast cleaning depends on various factors, and some studies have indicated that the blasting abrasive used to clean the surface is crucial for the performance of the coating. The previous work evaluated the performances of two liquid-applied epoxy pipeline coatings (coating A and coating B) applied to 15 different surfaces.
Picture for Variables That Can Affect Pull Off Adhesion of Coatings
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Variables That Can Affect Pull Off Adhesion of Coatings

Product Number: 51323-19147-SG
Author: Swapnil Shukla, Nicole Rakers, Michael McCarthy, Bernard McPeak
Publication Date: 2023
$20.00

Adhesion is a physical property that is crucial in many coatings, sealants, and adhesive applications, be it automotive, marine, or aerospace for example. Pull-off adhesion testing is an important tool in evaluating a coating’s performance, particularly while comparing pre- and post-exposure results. No matter what the application, the method for testing adhesion along with selecting the appropriate testing criteria has been the subject of multiple studies and reviews in the historical literature.
Pull-Off Adhesion Testing of Coatings - Improve Your Technique
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Pull-Off Adhesion Testing of Coatings - Improve Your Technique

Product Number: 41215-893-SG
Author: JF Fletcher, DJ Barnes
Publication Date: 2015
$20.00

Pull-off adhesion testing is widely used to assess the protective coating process. It is also used to determine if a coating is fit for service in new construction and for repairs to existing structures. The result is often critical to the acceptance or rejection of a coating process, as the adhesion value quoted by the paint manufacturer can be adversely affected by aspects of the coating process. Low adhesion values are indicative of premature failure of the coating and are often due to inadequate surface preparation of the substrate. 
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