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Powder coating line troubleshooting: achieving powder cure and avoiding craters
F O C U S
TECHNOLOGY PPG debuts ENVIROCRON HTE hightransfer-efficiency powder coating PPG Industries’ industrial coatings business has introduced ENVIROCRON® HTE (high-transferefficiency) powder coating, featuring a proprietary BPA-free polyester formulation that has a faster application build rate than traditional polyester coatings while providing more uniform coverage on complex parts and surfaces and reducing material waste. Engineered for appliance, architectural, wire goods and extrusion applications, Envirocron® HTE coating is engineered with an exclusive crosslink polymer that enables it to penetrate and apply evenly to metal parts and product assemblies with recessed cavities, odd shapes, and geometrically-complex surfaces such as refrigerator racks, patio tables, architectural components and other finished goods. Envirocron® HTE coating also can achieve first-pass transfer rates of 85% and better, which makes it ideal for spray-to-waste coatings applicators that want to reduce product loss. Envirocron® HTE coating cures in 10 minutes at 350°F, and it is available in a standard formulation to meet American Architectural Manufacturers Association (AAMA) 2603 specifications as well as in an ultra-durable version to achieve the AAMA 2604 standard. PPG also manufactures the coating in a wide range of colors and gloss ranges. Original Source: PPG Industries, 19 FEB 2015, (Website: http://www.ppg.com), © PPG Industries 2015
Powder coatings for corrosion control Anticorrosion coatings must offer up to 20-30 years guarantee for offshore assets, increase the lifetime of the system and decreased maintenance. Several powder products of Axalta, including Nap-Gard fusion-bonded epoxy (FBE), Alesta® ZeroZinc, Alesta® ZeroZinc Steel Prime and Abcite® line, are specifically intended for corrosion protection applications. Ideally for pipeline structures, Nap-Gard FBE provides 4
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POWDER
improved physical and chemical stability, adhesion to metal, resistance to abrasion and corrosion mitigation, and resistance to soil stress. Alesta® ZeroZinc offers excellent protection against corrosion exposed to extreme climate conditions, very aggressive atmosphere and high humidity. Alesta® ZeroZinc Steel Prime is used to protect ferrous metals from corrosion. Abcite® line of powder coatings offers exceptional protection against UV and corrosion under environmental conditions. Original Source: Coatings World, Feb 2015, 20 (2), 27-29 (Website: http://www.coatingsworld.com) © Rodman Media 2015
Powder coating line troubleshooting: achieving powder cure and avoiding craters Undercured powder coatings can be difficult to detect but cause a host of problems including chipping, loss of adhesion, poor durability and scratch resistance. One problem with recognizing undercure is that a poorly cured powder looks just like a fully cured one. Powder coaters don’t have the luxury of a “wet paint” condition to assess completeness of cure. Ensuring acceptable powder bake conditions requires the control of the following: metal mass in the Oven. Uneven and inconsistent loading of parts skews the metal temperature and may cause significant overbake or undercuring of the coating. Conveyor line speed – line stoppages can create overbake conditions whereas increased line speed may result in undercure. Mixing dense and thin gauge parts – dense parts such as castings require significantly longer oven dwell times to achieve the same temperature curve as light gauge sheet metal parts. In addition it is wise to select a powder coating with a wide recommended bake range. Avoiding environmental cratering sources requires vigilance in keeping compressed air contaminant-free and the application area clean and isolated from the rest of the plant. Conscientious maintenance procedures and caution with materials used to lubricate mechanical equipment is essential.
C O AT I N G S In addition avoid silicone greases and traditional rust preventatives. Original Source: Powder Coated Tough, Jan-Feb 2015, 9 (1), 41-45 © Powder Coating Institute 2015
AGC offers Fluon® ETFE coatings for tanks AGC Chemicals Americas Inc has introduced Fluon® ETFE powders. These new products are meltprocessable copolymers of ethylene and tetrafluoroethylene that are ideal for seamless rotolining and electrostatic coating of industrial equipment used in chemical processing applications. The powders provide protection against heat and chemicals as well as offer exceptional physical toughness. Original Source: Coatings World, Feb 2015, 20 (2), 34 (Website: http://www.coatingsworld.com) © Rodman Media 2015
Powder coating can reflect up to 30 percent more light A new ultra-reflective powder coating can increase the effective output of commercial lighting fixtures by up to 30 percent. Developed by AkzoNobel’s Powder Coatings business, “Interpon ReFlex” delivers good levels of light reflectance which make it cost-effective. What’s more, because the product is solvent-free (like all powder coatings), it also has a lower environmental impact than competing materials used in the lighting market. Due to be introduced globally during the course of 2015, “Interpon ReFlex” has already been proven at major lighting manufacturers throughout North America. Original Source: AkzoNobel Interpon website, 19Mar 2015, (Website: http://www.interpon.com) © AkzoNobel 2015
Archroma’s Pekoflam® HFC, a Powder Coating Additive Attains Oeko-Tex® 100 Compliance Archroma, one of the global leaders in specialty chemicals, announces that its novel halogen-free flame retardant powder coating additive, Pekoflam® HFC, is officially recognized as a manufacturer certified product by the Oeko-Tex® Association. Being the first powder additive to be listed for coating APRIL 2015
TECHNOLOGY PPG debuts ENVIROCRON HTE hightransfer-efficiency powder coating PPG Industries’ industrial coatings business has introduced ENVIROCRON® HTE (high-transferefficiency) powder coating, featuring a proprietary BPA-free polyester formulation that has a faster application build rate than traditional polyester coatings while providing more uniform coverage on complex parts and surfaces and reducing material waste. Engineered for appliance, architectural, wire goods and extrusion applications, Envirocron® HTE coating is engineered with an exclusive crosslink polymer that enables it to penetrate and apply evenly to metal parts and product assemblies with recessed cavities, odd shapes, and geometrically-complex surfaces such as refrigerator racks, patio tables, architectural components and other finished goods. Envirocron® HTE coating also can achieve first-pass transfer rates of 85% and better, which makes it ideal for spray-to-waste coatings applicators that want to reduce product loss. Envirocron® HTE coating cures in 10 minutes at 350°F, and it is available in a standard formulation to meet American Architectural Manufacturers Association (AAMA) 2603 specifications as well as in an ultra-durable version to achieve the AAMA 2604 standard. PPG also manufactures the coating in a wide range of colors and gloss ranges. Original Source: PPG Industries, 19 FEB 2015, (Website: http://www.ppg.com), © PPG Industries 2015
Powder coatings for corrosion control Anticorrosion coatings must offer up to 20-30 years guarantee for offshore assets, increase the lifetime of the system and decreased maintenance. Several powder products of Axalta, including Nap-Gard fusion-bonded epoxy (FBE), Alesta® ZeroZinc, Alesta® ZeroZinc Steel Prime and Abcite® line, are specifically intended for corrosion protection applications. Ideally for pipeline structures, Nap-Gard FBE provides 4
O N
POWDER
improved physical and chemical stability, adhesion to metal, resistance to abrasion and corrosion mitigation, and resistance to soil stress. Alesta® ZeroZinc offers excellent protection against corrosion exposed to extreme climate conditions, very aggressive atmosphere and high humidity. Alesta® ZeroZinc Steel Prime is used to protect ferrous metals from corrosion. Abcite® line of powder coatings offers exceptional protection against UV and corrosion under environmental conditions. Original Source: Coatings World, Feb 2015, 20 (2), 27-29 (Website: http://www.coatingsworld.com) © Rodman Media 2015
Powder coating line troubleshooting: achieving powder cure and avoiding craters Undercured powder coatings can be difficult to detect but cause a host of problems including chipping, loss of adhesion, poor durability and scratch resistance. One problem with recognizing undercure is that a poorly cured powder looks just like a fully cured one. Powder coaters don’t have the luxury of a “wet paint” condition to assess completeness of cure. Ensuring acceptable powder bake conditions requires the control of the following: metal mass in the Oven. Uneven and inconsistent loading of parts skews the metal temperature and may cause significant overbake or undercuring of the coating. Conveyor line speed – line stoppages can create overbake conditions whereas increased line speed may result in undercure. Mixing dense and thin gauge parts – dense parts such as castings require significantly longer oven dwell times to achieve the same temperature curve as light gauge sheet metal parts. In addition it is wise to select a powder coating with a wide recommended bake range. Avoiding environmental cratering sources requires vigilance in keeping compressed air contaminant-free and the application area clean and isolated from the rest of the plant. Conscientious maintenance procedures and caution with materials used to lubricate mechanical equipment is essential.
C O AT I N G S In addition avoid silicone greases and traditional rust preventatives. Original Source: Powder Coated Tough, Jan-Feb 2015, 9 (1), 41-45 © Powder Coating Institute 2015
AGC offers Fluon® ETFE coatings for tanks AGC Chemicals Americas Inc has introduced Fluon® ETFE powders. These new products are meltprocessable copolymers of ethylene and tetrafluoroethylene that are ideal for seamless rotolining and electrostatic coating of industrial equipment used in chemical processing applications. The powders provide protection against heat and chemicals as well as offer exceptional physical toughness. Original Source: Coatings World, Feb 2015, 20 (2), 34 (Website: http://www.coatingsworld.com) © Rodman Media 2015
Powder coating can reflect up to 30 percent more light A new ultra-reflective powder coating can increase the effective output of commercial lighting fixtures by up to 30 percent. Developed by AkzoNobel’s Powder Coatings business, “Interpon ReFlex” delivers good levels of light reflectance which make it cost-effective. What’s more, because the product is solvent-free (like all powder coatings), it also has a lower environmental impact than competing materials used in the lighting market. Due to be introduced globally during the course of 2015, “Interpon ReFlex” has already been proven at major lighting manufacturers throughout North America. Original Source: AkzoNobel Interpon website, 19Mar 2015, (Website: http://www.interpon.com) © AkzoNobel 2015
Archroma’s Pekoflam® HFC, a Powder Coating Additive Attains Oeko-Tex® 100 Compliance Archroma, one of the global leaders in specialty chemicals, announces that its novel halogen-free flame retardant powder coating additive, Pekoflam® HFC, is officially recognized as a manufacturer certified product by the Oeko-Tex® Association. Being the first powder additive to be listed for coating APRIL 2015