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Soluble Salt Determination Using the Saturated Filer paper Extraction Method

Soluble Salt Determination Using the Saturated Filer paper Extraction Method
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The determination of the concentration of soluble salts on a surface prior to the application of paint is a key inspection task for most protective coating processes. The entrapment of soluble salts, particularly on a steel surface can lead to premature coating adhesion failure and corrosion cells being established. 

Product Number: 41214-819-SG
Author: JF Fletcher
Publication Date: 2014
Industry: Coatings
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$20.00
$20.00

The determination of the concentration of soluble salts on a surface prior to the application of paint is a key inspection task for most protective coating processes. The entrapment of soluble salts, particularly on a steel surface can lead to premature coating adhesion failure and corrosion cells being established. This leads to a severe reduction in the expected life of the protective paint system. SSPC Guide 15 describes the saturate special filter paper conductivity meter methodology amongst others for the retrieval and analysis of soluble salts from steel and other nonporous surfaces. There have been recent developments in the design and features of the equipment available for this specific test. This test method has been used for many years and the basic method for extracting the soluble salts from the surface using a cleaned filter paper and pure water is unchanged. However, the electronic conductivity meter has been redesigned to include a menu structure with the measurement sequence displayed and a reading memory to store the values obtained using this test. The data contained in the memory can be transferred to Data Management Software to automate the presentation of the results in reports. This paper describes the measurement method and presents a case study of the analysis of test panels to demonstrate the performance of the method.

The determination of the concentration of soluble salts on a surface prior to the application of paint is a key inspection task for most protective coating processes. The entrapment of soluble salts, particularly on a steel surface can lead to premature coating adhesion failure and corrosion cells being established. This leads to a severe reduction in the expected life of the protective paint system. SSPC Guide 15 describes the saturate special filter paper conductivity meter methodology amongst others for the retrieval and analysis of soluble salts from steel and other nonporous surfaces. There have been recent developments in the design and features of the equipment available for this specific test. This test method has been used for many years and the basic method for extracting the soluble salts from the surface using a cleaned filter paper and pure water is unchanged. However, the electronic conductivity meter has been redesigned to include a menu structure with the measurement sequence displayed and a reading memory to store the values obtained using this test. The data contained in the memory can be transferred to Data Management Software to automate the presentation of the results in reports. This paper describes the measurement method and presents a case study of the analysis of test panels to demonstrate the performance of the method.

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