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51315-5748-A Novel Method for the Measurement of Dry Film Thickness on Profiled Steel Surfaces

Picture for A Novel Method for the Measurement of Dry Film Thickness on Profiled Steel Surfaces
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Product Number: 51315-5748-SG
ISBN: 5748 2015 CP
Author: John Fletcher
Publication Date: 2015
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The effect of profiled surfaces on the calibration of dry film thickness gauges is well documented. There are several methods given for dealing with the increase in apparent coating thickness caused by the roughness of a surface for example the blast profile achieved by abrasive blast cleaning of a steel surface. These are described in the ASTM standard practice D7091 ISO 2808 and BS EN ISO 19840.A novel test method has been developed specifically for measurement of dry film thickness on abrasive blast surfaces where the gauge has been pre-calibrated for the three levels of blast profile commonly encountered.This paper will discuss the operation of this new gauge and the advantages that this approach offers to structural steel and marine coating applications in particular. Field trials will be described and the benefits and limitations will be discussed.

The effect of profiled surfaces on the calibration of dry film thickness gauges is well documented. There are several methods given for dealing with the increase in apparent coating thickness caused by the roughness of a surface for example the blast profile achieved by abrasive blast cleaning of a steel surface. These are described in the ASTM standard practice D7091 ISO 2808 and BS EN ISO 19840.A novel test method has been developed specifically for measurement of dry film thickness on abrasive blast surfaces where the gauge has been pre-calibrated for the three levels of blast profile commonly encountered.This paper will discuss the operation of this new gauge and the advantages that this approach offers to structural steel and marine coating applications in particular. Field trials will be described and the benefits and limitations will be discussed.

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