The Severe Wastewater Analysis Test, or S.W.A.T, was a joint development effort between several firms, including CTL, to provide an appropriate, aggressive test to evaluate coatings that are for use in wastewater applications. In 2013, the standard was accepted by ASTM under designation ASTM G210-13. In 2012, the S.W.A.T. was selected by the Materials Performance Magazine, as the first Readers’ Choice Corrosion Innovation of the Year Award, among 64 innovations nominated from 17 countries. Readers of the magazine voted on the top 10 nominations in January 2012.
Sewer gasses can contain hydrogen sulfide (H2S), carbon dioxide (CO2), and methane (CH4), which corrosive gasses that can alter barrier properties of protective coatings and linings. Therefore, to assess the likelihood that a coating will provide adequate protection, a proper simulation was needed. Coated steel panels are exposed in an airtight chamber to the simulated sewer gasses with a constant temperature of 150 degrees Fahrenheit. Cyclic exposure between an aqueous solution is also completed three times daily for a period of 15 minutes. The test duration is 28 days.