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Myth or Fact: Higher Surface Profile Increases Coating Adhesion

Myth or Fact: Higher Surface Profile Increases Coating Adhesion
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Many coating product data sheets call for surface profiles of 3-4 mils. Others call for 1.5-2 miles surface profile for a very similar coating type – why should this be? To start to understand this we need to first of all look at why we measure the surface profile on steel surfaces. It pretty much comes down to two main things.

Product Number: 41216-969-SG
Author: Brad Gooden
Publication Date: 2016
Industries: Coatings , Coatings and Linings
$0.00
$20.00
$20.00

Many coating product data sheets call for surface profiles of 3-4 mils. Others call for 1.5-2 miles surface profile for a very similar coating type – why should this be? To start to understand this we need to first of all look at why we measure the surface profile on steel surfaces. It pretty much comes down to two main things.

Many coating product data sheets call for surface profiles of 3-4 mils. Others call for 1.5-2 miles surface profile for a very similar coating type – why should this be? To start to understand this we need to first of all look at why we measure the surface profile on steel surfaces. It pretty much comes down to two main things.

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Effect of Surface Preparation of Coating Performance
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Effect of Surface Preparation of Coating Performance

Product Number: 41216-953-SG
Author: Patrick Cassidy
Publication Date: 2016
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Coating performance and longevity is highly dependent on the quality of substrate surface preparation. The effect of profile height, profile type (e.g., type of tool used to perform the prep, angularity of profile, etc.), extent of cleanliness, and amount of chloride contamination on coating performance were all studied to determine the correlation between these factors in an attempt to identify the primary factor in coating failure due to improper surface preparation.
Surface Roughness Profile and its effect on Coating Adhesion and Corrosion Protection
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Surface Roughness Profile and its effect on Coating Adhesion and Corrosion Protection

Product Number: 51220-238-SG
Author: S. G. Croll
Publication Date: 2020
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Modern design, manufacturing and field-testing specifications include surface profile and adhesion testing on the assumption that they are linked to long term corrosion prevention. There are a number of careful studies, dating back decades, that find no link between measurements of adhesion and (undercutting) corrosion performance, but other studies do, and the concept remains intuitively appealing and widely assumed.
New Developments in Surface Profile Measurement for Blast Cleaned Surfaces
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New Developments in Surface Profile Measurement for Blast Cleaned Surfaces

Product Number: 41213-746-SG
Author: J F Fletcher
Publication Date: 2013
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When protective coatings are to be applied to structures, it is important that the surface is clean and dry if premature failure of the coating is to be prevented and the full coating service life achieved. In many situations for both new build and repair of structures, blast cleaning of the surface is required to remove contamination and to create an anchor pattern to enhance the adhesion of the coating system to the substrate. 
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