Dry film thickness testing procedure

This is how to measure wet film thickness using a wet film thickness gauge, also known as a wet film comb. This practice is intended to supplement the manufacturers instructions for the manual operation of the gages and is not intended to replace them. Paint thickness measurement drywall resources defelsko. Sspcpa 2 procedure for determining conformance to dry. Also known as a paint gauge or a mil gage, it includes mechanical and digital coating thickness gauges suitable for. D7091 standard practice for nondestructive measurement of dry film thickness of nonmagnetic coatings applied to ferrous metals and nonmagnetic, nonconductive coatings applied to non. Inspection and testing procedure for painting of pipes and. Process specification for dryfilm lubricant application. The sspc committee on dry film thickness measurement began revising and updating the 2004 version in 2007. Standard practices for measurement of dry film thickness. The standard test method is described in astm d6208. In iso 19840 and pspc, the term used is nominal dry film. Procedure for dry film thickness gauges sspcpa2 and example.

In iso 19840 and pspc, the term used is nominal dry film thickness. It is the single reading, the point you place the instrument probe. What is a dry film thickness gauge, destructive astm. The minimum and maximum total dry film thickness of the paint shall be as per the clients requirements or manufactuers recommendations. Wet film thickness formulas and example calculations. Wet film thickness shall be monitored to control the required minimum dry film thickness. This unique range wet film thickness gauge is the standard gauge for testing coil coatings. Standard method of measurement of dry film thickness of protective coatings systems by destructive means, designation. Final inspection shall include measurement of paint dry film thickness, adhesion, holiday detection check of finish and workmanship. This international standard specifies a procedure for the verification of dryfilm thickness against nominal dryfilm thickness on rough surfaces, including the adjustment of the instruments used, the. Sspcsp1 solvent cleaning is an essential requirement and it is. This can either be a single layer or multiple layers. The tqc sp1100 superpig is a destructive precision tool for inspection and thickness measurement on single or multiple coats on virtually all substrates, including wood, plastics, metals etc. The model c wet film thickness gauge is a precision instrument for use in the lab, the field.

Corrosionpedia 7 methods of coating thickness measurement. Hmec module c coatings lab manual participant workbook. To determine dry film weight, multiply table values by percent solids. Measurements of dry film coating thickness on steel. Sspcpa 2 measurement of dry paint thickness with magnetic gauges procedures to measure dry film thickness of nonmagnetic coatings over magnetic substrates type 1 magnetic pulloff. Wet film thickness gauges are designed to quickly and easily measure the thickness of coatings immediately after they have been applied to a substrate. It is the average of 3 gage reading within a circle of 1. D7091 standard practice for nondestructive measurement of dry film thickness of nonmagnetic coatings applied to ferrous metals and nonmagnetic, nonconductive coatings applied to nonferrous metals dry film thickness nondestructive test eddy current gages magnetic gages nonconductive coatings nonmagnetic coatings ferrous alloys. In 1947, elcometer launched one of the worlds first nondestructive. It provides vital information as to the expected life of the substrate, the products fitness for purpose, its appearance. It provides vital information as to the expected life of the substrate, the products fitness for purpose, its appearance and ensures compliance with a host of international standards. Elcometer offers a wide range of coating thickness gauges to measure dry film thickness. The thickness should be measured at as many points locations as.

Standard test method for nondestructive measurement of dry film thickness of applied organic coatings using an ultrasonic gage 2008, astm. Addition to sspcpa 2, determining conformance to coating. Application specifications for coating systems single. Technical guide guide to protective coatings, inspection. Dry film thickness gauge, destructive is a measuring tool used to determine dry film thickness by cutting and removing a cross section, making a precise vgroove or geometric cut on the coating and then. Test procedure and acceptance criteria prime painted. D 5162 discontinuity holiday testing of nonconductive protective coating on metallic substrates d 5402 assessing the solvent resistance of organic coatings using solvent rubs d 6677 evaluating. The sspcpa 2 outlines a test procedure based on following definitions. For example, if the specification requires 3 mils dry film thickness and the coating manufacturer does not provide any additional information regarding a recommended thickness range. It was compared to the american society for testing and materials method d 269773 volume nonvolatile. The latest edition of the standard procedure for determining conformance to dry coating thickness requirements is dated may 2012 and was made available to the industry in july 2012. Dft is the thickness of a coating as measured on top of a substrate. For consistency in comparisons of area in this article, square meters are used to describe area measures.

Ultrasonic coating thickness measurement is now an accepted and reliable testing routine used in wood industries. Standard test method for measurement of dryfilm thickness of organic coatings using micrometers1 this standard is issued under the. Apply lubricant designation dryfilm lubricant per nasajsc prc8001 this specification controls the curing timetemperature section 6. Sspcpa 2 procedure for determining conformance to dry coating thickness requirements william d. Dry film thickness is probably the most critical measurement in the coatings industry. Elcometer offers a wide range of coating thickness gauges to measure dry film thickness the elcometer range of destructive coating thickness gauges includes the elcometer. Procedure for measuring wet film thickness astm d 4414 o. Use of these procedures may require repair of the coating film. Paints and related materials methods of test determination of dry film thickness on metallic substrates nondestructive methods. Expect to get different gage reading even if they are even too close to each other.

Measurement of wet and drybulb temperatures astm d3276, standard guide for painting inspectors metal substrates timeline for completion. Calibration foils are required to verify the accuracy of measurements. Coating thickness gauges dry film blastquip stock the world leading defelsko and tqc range of coating thickness testing, inspection and measurement equipment as part of our extensive range of. The coating inspection article explains about the chloride test, surface profile measurements, wet and dry film thickness measurement, etc. Measuring coating thickness according to sspcpa2 update. Appendix 2 methods for measuring dry film thickness on steel beams girders appendix 3 methods for measuring dry film thickness for a laydown of beams, structural steel, and. Foil sets, zero plates and coated thickness standards. Calibration foils or shims are the most convenient way of creating a coating. Coating weights are based on a coating density of 1 gcm 3 8. Astm d7091 standard practice for nondestructive measurement of dry film thickness of nonmagnetic coatings applied to ferrous metals and nonmagnetic, nonconductive coatings applied.