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Measurement of Internal Coating Stresses of MIL-PRF-23377 Top Coated with MIL-PRF-8528

Internal coatings stress (ICS) develops in coatings applied to a rigid substrates. During drying, volume changes due to solvent loss and/or cure induces stresses in the films. Differences in the thermal expansion coefficients of the coating and substrate also affect the ICS. ICS affects the interfacial adhesion and results in delamination once the stress exceeds the force of adhesion. 

Product Number: 41215-884-SG
Author: Devin Clark, Richard C. Ferguson, James W. Rawlins
Publication Date: 2015
Industries: Test Method , Coatings
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Internal coatings stress (ICS) develops in coatings applied to a rigid substrates. During drying, volume changes due to solvent loss and/or cure induces stresses in the films. Differences in the thermal expansion coefficients of the coating and substrate also affect the ICS. ICS affects the interfacial adhesion and results in delamination once the stress exceeds the force of adhesion. To measure ICS, a coating is applied to a thin strip of stainless steel and placed into a cantilever deflection apparatus (CDA) and the deflection from the base of the CDA to the bottom of the substrate is measured and incorporated into Corcoran’s equation.

Internal coatings stress (ICS) develops in coatings applied to a rigid substrates. During drying, volume changes due to solvent loss and/or cure induces stresses in the films. Differences in the thermal expansion coefficients of the coating and substrate also affect the ICS. ICS affects the interfacial adhesion and results in delamination once the stress exceeds the force of adhesion. To measure ICS, a coating is applied to a thin strip of stainless steel and placed into a cantilever deflection apparatus (CDA) and the deflection from the base of the CDA to the bottom of the substrate is measured and incorporated into Corcoran’s equation.

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