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February 3 - February 7, 2014

What would be a reasonable service life for a two-coat, zinc-rich epoxy/epoxy mastic system, about 200-250 microns, in a marine environment? What evidence is there from the field?


Selected Answers

From jesse chasteen of schriener construction on February 8, 2014:
Is the exposure environment atmospheric or immersion?

From Warren Brand of Chicago Corrosion Group on February 6, 2014:
As Joe mentioned, this is a highly complex question and the question begs multiple other questions. What is the environment? What is the surface prep? Coating companies will have significant amounts of data pertaining to performance of their various products in various environments, including marine (depending on salt or fresh). Lastly, and perhaps most important, is why are you considering a two-coat, zinc-rich system? Have you done your due diligence to find out which coating system would be optimal in this environment?

From Joe Greiner of Odle, Inc. on February 5, 2014:
Without knowing what surface prep is being achieved or even the type of substrate being coated, you cannot accurately answer this question. Also knowing the location of the application will go a long way in trying to use field evidence. A freshwater marine environment is considerably different then a saltwater environement. I know you're looking for an answer like "you should expect a 6-7 year service life," but having all the information is necessary to answer this question accurately.

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Tagged categories: Coating Materials; Coating performance; Exposure conditions


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