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(Coating Application,Types & Characteristics) New SSPC Paint 47 Fluoropolymer Topcoat Standard for

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Since the 1980s, fluoropolymer resin technologies have offered the possibility of a quantum improvement in topcoat decorative properties- gloss and color retention- compared to conventional acrylic and polyester resins. Specifiers of both protective and architectural restoration coatings systems have expressed a need for a new SSPC standard for field-applied fluoropolymer topcoats, particularly for bright and saturated colors.

Product Number: 13-COAT_DEC21
Author: Dr. Kurt Wood
Publication Date: 2021
Industry: Coatings
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$20.00
$20.00

Since the 1980s, fluoropolymer resin technologies have offered the possibility of a quantum improvement in topcoat decorative properties- gloss and color retention- compared to conventional acrylic and polyester resins. Specifiers of both protective and architectural restoration coatings systems have expressed a need for a new SSPC standard for field-applied fluoropolymer topcoats, particularly for bright and saturated colors. In the past few years, the SSPC C.1.8 committee worked to develop such a standard, which issued in December 2020 as SSPC Paint 471. A key challenge has been to identify a set of accelerated weathering test conditions that would allow for the reliable qualification of fluoropolymer topcoat formulations, much faster than the 10-50 year outdoor service life of the fluoropolymer paint. Using a round-robin weathering study of 13 resin systems (fluorinated and non-fluorinated) from 10 different manufacturers, in four reference colors, we have identified accelerated test conditions that accurately differentiate between high weatherability fluoropolymer formulations, and conventional SSPC Paint 36 and MPI 311 formulations (Spearman rank correlation > 0.90). :

Since the 1980s, fluoropolymer resin technologies have offered the possibility of a quantum improvement in topcoat decorative properties- gloss and color retention- compared to conventional acrylic and polyester resins. Specifiers of both protective and architectural restoration coatings systems have expressed a need for a new SSPC standard for field-applied fluoropolymer topcoats, particularly for bright and saturated colors. In the past few years, the SSPC C.1.8 committee worked to develop such a standard, which issued in December 2020 as SSPC Paint 471. A key challenge has been to identify a set of accelerated weathering test conditions that would allow for the reliable qualification of fluoropolymer topcoat formulations, much faster than the 10-50 year outdoor service life of the fluoropolymer paint. Using a round-robin weathering study of 13 resin systems (fluorinated and non-fluorinated) from 10 different manufacturers, in four reference colors, we have identified accelerated test conditions that accurately differentiate between high weatherability fluoropolymer formulations, and conventional SSPC Paint 36 and MPI 311 formulations (Spearman rank correlation > 0.90). :

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(Coating Application, Types & Characteristics) Use of Duplex Coating Systems for Protection of Structural Steel

Product Number: 15-COAT_DEC21
Author: William D. Corbett
Publication Date: 2021
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The use of duplex coating systems (hot dip galvanizing or thermal spray coating with one or more liquid-applied coatings) for long term protection of structural steel is becoming more mainstream in many industries. This paper describes the advantages of employing duplex coating systems as well as some important considerations for designers prior to specifying their use. It also highlights an ongoing initiative to help agencies more efficiently and effectively use duplex coatings on steel bridges by developing guidelines, standards, and other materials.
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(Coating Formulation) Can Low Zinc Epoxy Primers Work as Well as Traditional Zinc Rich Epoxy Primers

Product Number: 47-COAT_DEC21
Author: Alex Yagüe / Pinturas Hempel / David Morton
Publication Date: 2021
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Zinc-rich primers, with zinc dust loadings of 80-85% by weight in the dry film, are often the preferred primer during new construction of assets placed in environments with high atmospheric corrosivity. Coating standards such as SSPC-Paint 20 and ISO 12944 demand that zinc-rich primers contain at least 65% and 80% zinc dust by weight in the final dry film, respectively. Traditional zinc rich primers need this high zinc loading to achieve galvanic protection of steel. New technology allows us to develop zinc primers with a lower content of zinc and/or different zinc morphology than dust to provide similar or better corrosion protection to the steel.
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(Coating Formulation) Corrosion Resistance Comparison of Zinc-Rich Epoxy With Reduced Zinc Levels

Product Number: 46-COAT_DEC21
Author: Mary Roley
Publication Date: 2021
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Zinc-rich coatings have long been known to provide excellent corrosion resistance in highly corrosive environments, in general,inorganic zincs for new construction and organic zincs for maintenance. A recent trend has been toward zinc-rich coatings with reduced levels of zinc dust. An SSPC committee formed to revise SSPC Paint 29, Zinc Dust Sacrificial Primer, Performance Based, to reference performance only, removing reference to minimum zinc dust level.
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