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Replica Tape- A Source of New Surface Profile Information

Replica Tape- A Source of New Surface Profile Information
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Steel surfaces are frequently cleaned by abrasive impact prior to the application of protective coatings. The resultant surface profile, sometimes called an anchor pattern, is comprised of a complex pattern of peaks and valleys, which must be accurately assessed to ensure compliance with job or contract specifications. 

Product Number: 41214-808-SG
Author: David Beamish
Publication Date: 2014
Industries: Coatings , Coatings and Linings
$0.00
$20.00
$20.00

Steel surfaces are frequently cleaned by abrasive impact prior to the application of protective coatings. The resultant surface profile, sometimes called an anchor pattern, is comprised of a complex pattern of peaks and valleys, which must be accurately assessed to ensure compliance with job or contract specifications. Measured parameters include profile height, peak count, peak density and increase in surface area (rugosity). In the protective coatings industry, replica tape is widely used for quantifying surface profile. However, as with most other means of field measurement, tape determines only maximum profile height. Other measures of surface texture, no less meaningful, can, in principle, be obtained using electron or confocal microscopes or interferometric laser profilers, but these large, complex, and expensive instruments are unsuitable for field use. Replica tape provides a reverse copy of a blast cleaned steel surface. This paper re-examines replica tape as a source of many of the surface profile parameters required by coatings professionals. It explains how it is possible to obtain valuable new information from replica tape using simple, low-cost field devices.

Steel surfaces are frequently cleaned by abrasive impact prior to the application of protective coatings. The resultant surface profile, sometimes called an anchor pattern, is comprised of a complex pattern of peaks and valleys, which must be accurately assessed to ensure compliance with job or contract specifications. Measured parameters include profile height, peak count, peak density and increase in surface area (rugosity). In the protective coatings industry, replica tape is widely used for quantifying surface profile. However, as with most other means of field measurement, tape determines only maximum profile height. Other measures of surface texture, no less meaningful, can, in principle, be obtained using electron or confocal microscopes or interferometric laser profilers, but these large, complex, and expensive instruments are unsuitable for field use. Replica tape provides a reverse copy of a blast cleaned steel surface. This paper re-examines replica tape as a source of many of the surface profile parameters required by coatings professionals. It explains how it is possible to obtain valuable new information from replica tape using simple, low-cost field devices.

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Methods for the Measurement of Surface Profile in the Field
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Methods for the Measurement of Surface Profile in the Field

Product Number: 41210-538-SG
Author: John Fletcher
Publication Date: 2010
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The SSPC Surface Profile Committee has been preparing a specification for the measurement of surface profile based on the four methods described in ASTM D4417, Standard Test Methods for Field Measurement Of Surface Profile of Blast Cleaned Steel. These methods are surface comparators, surface profile depth gauges, replica tape and the stylus profile gauges. 
Surface Comparison Profile - A Comparison of Measurement Methods
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Surface Comparison Profile - A Comparison of Measurement Methods

Product Number: 41213-731-SG
Author: David Beamish
Publication Date: 2013
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Coating performance is related to the profile height on a steel surface. Three types of devices are available to take measurements of this surface profile: replica tape, depth micrometers fitted with pointed probes, and stylus roughness testers. This paper presents results from a recent analysis of measurements taken by the three device types on steel blasted with an assortment of blast media and proposes a new method of depth micrometer measurement called average of the maximum peaks.
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
$20.00

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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