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Ecodur 201: Clarifier Coating Project (EPC)

1_Elite Protective Coating Jon-Goza

With the US getting a ‘D’ grade report on the state of its wastewater industry in 2013, and needing nearly $300 billion to be spent over 20 years to get it up to par, ways to improve maintenance of facilities while keeping costs in check, have become paramount. Coated surfaces are a frontline form of defense against degradation of equipment, tanks and critical water conduits.

2_Colorado Industrial Coating

Problem
A water plant facility in Colorado, has been re-coating its clarifier unit every two years at significant expense and inconvenience. A coating was needed that was considerably more robust than the conventional ones the plant had been using, as well the need to not add any toxic burden to the wastewater stream itself or in any way expose workers to toxic fumes as can be experienced when Volatile Organic Compounds are released during application with conventional epoxy coatings.

Furthermore, it was vital to limit downtown in the treatment process as this case involved the clarifier for wastewater treatment, as many coatings require three or four days for completion.
Additionally, it was important that the coating could be applied during harsh, cold Colorado temperatures that can prevent the use of more conventional epoxy coatings.

3_Clarifier Surface Preparation

4_Clarifier Project

5_Clarifier Industrial Coating

Solution
The contractor, Elite Protective Coatings, chose, in consultation with their client, Ecodur 201, as it not only fulfilled the client’s goal of using a sustainable coating, it is also standout for being completely non-toxic and inert in contact with wastewater. It is also NSF/ANSI 61 rated for use with potable water, VOC-free, and BPA-free.

Furthermore, in the Colorado’s chilly Fall and Winter temperatures it can outperform most conventional epoxy coatings at extremely low temperatures, as long as the surface Ecodur is being applied to is four or five degrees above the prevailing Dew Point.

Ecodur is also notable for there being no limit to the application thickness which allows for generous coverage for cracks and other anomalies that might require additional protection. It retains a high degree of flexibility throughout its lifetime and has the unique characteristic of being re-bondable at any stage of its lifetime too.
This becomes especially significant if repairs are required or modifications are being made. With its adherence being close to double that of conventional epoxies, delamination is kept to an absolute minimum, whereas many epoxies fail rapidly due to micro-cracking.

6_Clarifier Protective Coating

7_Clarifier Coating

Application Results
The application on a variety of surface types, including vertical, went as planned and tack dry was achieved within the standard 30-minute period. At the expiration of the 24-hour hold period following completion of the application, a final inspection was made and the coated area was formally declared fit for use.

With over 20-years of use as a marine coating on ship decks and extensive use in the wastewater industry, it is anticipated that the current regime of re-coating every two years will be significantly extended based on the performance achieved from similar applications.