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Speed up Your Dry Film Thickness Measurements Using a Scanning Probe

Speed up Your Dry Film Thickness Measurements Using a Scanning Probe
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Time is money and the ability to speed up the process of taking and analyzing coating thickness readings will always pay dividends in reducing inspection costs. Scanning an area of painted steel will always be quicker than taking individual readings but there was always the danger of wearing the probe and reducing its life. 

Product Number: 41214-818-SG
Author: JF Fletcher
Publication Date: 2014
Industry: Coatings
$0.00
$20.00
$20.00

Time is money and the ability to speed up the process of taking and analyzing coating thickness readings will always pay dividends in reducing inspection costs. Scanning an area of painted steel will always be quicker than taking individual readings but there was always the danger of wearing the probe and reducing its life. There are now probes fitted with a replaceable wearing surface to protect the probe from abrasion wear when using the probe to scan a surface. Simple plastic caps can be fitted to these probes and the thickness of the cap can be taken into account in the calibration procedure. Gauge firmware has also been developed to allow the data generated by the scan to be processed and analysed to produce either an average value for the thickness in the area together with a highest and lowest reading (scan mode), or to produce a batch of individual readings at the rate of 140 reading/minute (auto repeat mode). This firmware is supported by Data Management Software to automate the presentation of the results in reports. This paper describes the scanning probes and their use and describes how coating thickness data can be collected for analysis using the method described in SSPC PA-2 for determining conformance to dry coating thickness requirements.

Time is money and the ability to speed up the process of taking and analyzing coating thickness readings will always pay dividends in reducing inspection costs. Scanning an area of painted steel will always be quicker than taking individual readings but there was always the danger of wearing the probe and reducing its life. There are now probes fitted with a replaceable wearing surface to protect the probe from abrasion wear when using the probe to scan a surface. Simple plastic caps can be fitted to these probes and the thickness of the cap can be taken into account in the calibration procedure. Gauge firmware has also been developed to allow the data generated by the scan to be processed and analysed to produce either an average value for the thickness in the area together with a highest and lowest reading (scan mode), or to produce a batch of individual readings at the rate of 140 reading/minute (auto repeat mode). This firmware is supported by Data Management Software to automate the presentation of the results in reports. This paper describes the scanning probes and their use and describes how coating thickness data can be collected for analysis using the method described in SSPC PA-2 for determining conformance to dry coating thickness requirements.

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In the spring of 2014, a new SSPC-PA21 standard is scheduled to be published. Despite the fact that this is the second major revision in as many years, new technologies and techniques have been introduced since the 2014 standard was revised and sent to ballot. Some examples include a factory-calibrated coating thickness gauge with pre-defined surface profiles, as well as a scanning probe designed to be slid across a cured coating while taking readings in real time. When these new technologies are put into practice, dramatic improvements in overall inspection times and data accuracy can be seen.
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Product Number: 41215-892-SG
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Over recent years there have been interesting developments in the way marine coatings and linings are specified that have unwittingly resulted in a situation that can make it challenging to meet a paint specification as currently written. 
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