CoatingsPro Magazine

MAR 2015

CoatingsPro offers an in-depth look at coatings based on case studies, successful business operation, new products, industry news, and the safe and profitable use of coatings and equipment.

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COATINGSPRO MARCH 2015 29 Specifying Success Tank Armor provides highly reliable protection for interior steel substrates of tanks used in the petrochemical storage and transport industry. Its performance has been proven through comprehensive testing and in-service use over many years. These ultra-durable epoxy linings are unmatched for chemical, crude oil, fuels, corrosion and abrasion resistance. They provide excellent edge and weld protection in a single, high-build coat and rapid return to service. For more information, please visit tnemec.com/TankArmor or stop by booth #21073 at CORROSION 2015. ADVANCED LINING PROTECTION TANK ARMOR BENEFITS: • 100% solids epoxy • Solvent-free and VOC compliant • High-build, thick-flm barrier • Special formulations for different uses WHEN INTERIOR PROTEC TION COUNT S, COUNT ON TANK AR MOR. Wr i te in Re ad e r In q u ir y #81 expensive paint systems I specify is for exterior steel. It is done in the feld, requires skill, and is often right at eye level where every faw in the surface earns a little blue piece of tape during "the punch." In the past, paint systems have flled many an architect with dread. Not only is the subject bubbling over with chemistry and physics — two subjects not often found on the architect's home bookshelf — but the retail aspects of product diferentiation and naming further confuse the matter to a state of apparent incomprehension. We rely upon the knowledgeable and friendly visage of our local product represen- tative to boil the subject down to something solid we can grasp. Direct-to-Metal Paint One of the new resins mentioned is often formulated as a direct-to-metal (DTM) coating. As architects, we rarely use DTM coatings on exteriors. Instead, we prefer the more tradi- tional belts and suspenders of the epox y for protection of the metal and a urethane for good color and gloss retention and protection of the epox y. DTM products may be ver y good, but as they also recommend a minimum NACE No. 3/Society for Protective Coatings (SSPC) Surface Preparation (SP) 6: Commercial Blast Cleaning, they would have to be painted in the shop at the time of blasting. T his would require the steel fabricator, who is prepping the steel under controlled conditions, to paint the steel. We prefer to have the site painting contractor coordinating the color and application of all the paint to assure color match throughout the job. A lso, there is concern about the amount of damage to the finish during transport and again during erection that would have to be touched up versus touch- ing up the primer and finishing the work in the field. You could face the prospect of touching up in situ w ith a paint that has a short pot life, limited open time, and short recoat w indow and that can be of a custom color that has to be mi xed and spray-applied for best results at certain temperature and humidity requirements — and do all of that on a busy city street, mid-week, w ith a slight w ind. T his is not a recipe for success. System Updates Over the past 20 years, chemical compa- nies have become more common at public forums. New resins and, there- fore, new coating systems, have recently been developed. Te question remains: Do these new resin types solve problems

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