Problem Solving Forum (4)


What can be done to prevent rust bleed in crevices when applying a zinc/epoxy/urethane system?


On guardrails on a marine wharf, grating panels consisting of mild steel bars about 1/8-inch by 1-inch on a 2-inch-square grid were painted with a three-coat zinc/epoxy/urethane system. Inspectors are finding numerous pinholes in the finish coat along the inside corners of the grating where the 1-inch-thick bars meet at a 90-degree angle. These pinholes were not noticed in the zinc or epoxy coats, but the final coat's visual inspection is more detailed. What is the likely cause of the pinholing, and what could be done to prevent it on future applications? Also, what should the disposition of the parts with pinholes be, as in, repair, accept as is, reblast and recoat, or an alternative?


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Articles (21)


In Transit — Materials Selection for Transportation Terminals

from D+D In Depth, November 2017 ; by ALLEN ZIELNIK, ATLAS MATERIAL TESTING TECHNOLOGY LLC

While the scale and scope of transportation terminals can vary greatly, they all need...


A Waterborne UV Wood Coating That Goes with the Grain in a Unique, Sustainable Floor

from D+D In Depth, September 2017 ; by Steven Reinstadtler and Robert Wade, Covestro LLC

The evolution of water-based UV-cured wood coating technology has led to the availabi...


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Video Learning Center (15)


Architectural Coatings: A PaintSquare Video Education Series

The D+D Pro Video Series: An archive of webinars hosted by DurabilityandDesign.com

A collection of archived webinars hosted by DurabilityandDesign.com focused on architectural coatings.


Concrete: A PaintSquare Video Education Series

The D+D Pro Video Series: An archive of webinars hosted by DurabilityandDesign.com

A collection of archived webinars hosted by DurabilityandDesign.com focused on concrete coatings and maintenance.


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