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SURFACE 2018

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36 SURFACE PREP 2018 COATINGSPROMAG.COM Concrete and Water for surface cleanliness is also described, utilizing a method similar to the ISO 8502-3 method. Use of adhesive clear tape and a magnifier are explained. In ASTM D4258: Standard Practice for Surface Cleaning Concrete for Coating, section B.10 Visual Inspection states, "is describes a method of surface cleaning that is intended to provide a clean, contaminant-free surface without remov- ing concrete from an intact, sound surface. Following the cleaning, visually examine the prepared surface to verify that it is free of debris, dust, dirt, oil, grease, loosely adher- ent concrete, and other contaminants. Test surface is cleaned with detergent or non-solvent emulsifying agents for pH following ASTM Test MethodD4262. Moisture content may be determined following ASTM Test Method D4263." Unfortunately, this visual inspection provides nothing more than an inspector's word and written report if litigation results from a coating problem or failure. e clear tape may provide a result on a smooth surface, but what about a surface prepared with an anchor profile? e foam tape mentioned previously may (or may not) provide an answer. Currently being developed is joint standard SSPC-SP-13/ NACE No. 6, which is now in a committee revision. More than likely, utilizing sandpaper as a method of determining profile should and will be removed, and it is expected to be replaced by the 10 ICRI CSP chips. Surface profile determination using ASTM D4782-2017 will be included in the Appendix of that standard. For determining surface cleanliness, using a clear tape or a cloth of an opposing color to surface color will probably remain. Progress within the coating industry can be painfully slow, but it will eventually bring changes. ASTM D7682-17 took 5½ years to get through commit- tees. It is now an accepted tool for determining concrete profiles, which is just the start of a coating job. Before appli- cation, surface cleanliness must be inspected. e methods for inspection of that cleanliness should always be included in a specification. Staying Current Stay ing current w ith standards, their revised editions, and new ideas and products coming into the industr y are crucial. Hopefully, coating specifications w ill include required surface cleanliness tests, aiding contractors to achieve, as close as possible, a surface " free of all dirt, dust, and contaminants." CP Randy Glover is the president and owner of O.T.B. Technologies, Inc., located in Tooele, Utah. He has more than 45 years in the coatings and surface preparation industry, beginning in automobile restoration/painting/inspection, continuing on to aircraft painting/inspection, then to heavy industrial surface preparation, paint- ing , and inspection. He is an active member of NACE, SSPC, the ASTM D01.46 subcommittee, and a member of the surface preparation committee for ICRI. For more information or a copy of the University of Utah paper, contact: O.T.B. Technologies, Inc., otb2003@hotmail.com, www.otbtech.net p h o to co u r te s y o f T h in k s to c k Standards continue to change, and it's important to stay up to date on the new requirements. This includes tests that may help to confirm that a surface is "free of all dirt, dust, and contaminants."

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