Severe wastewater testing program for rapid evaluation of coatings and linings

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Courtesy of Tnemec Company, Inc.

High-performance protective coatings are often failing in the severe headspace environments of domestic wastewater collection and treatment systems. These failures are attributed to many factors including low permeability properties to resist H2S and other corrosive gases present within this environment. Although the chemical and physical properties of coating systems can be determined in the laboratory, this is not the case for the effects of environmental conditions such as exposure to severe wastewater headspace environments. Due to a paucity of testing practices for wastewater conditions, specifiers are faced with product selection based upon unsubstantiated claims by manufacturers for use in these severe environments. This paper discusses the advancement of a novel cabinet testing protocol designed to simulate the effects of a severe wastewater headspace environment and that produces interpretable data in a period of 28 days.

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