Rilsan® Powders for Water Applications

Why Should I Use Rilsan® Powders to Coat My Water Treatment Systems?

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The most important factor when selecting Rilsan® powders for use in coating piping and components for water use is the NSF 61 certification across a number of the color selections. NSF 61 is a National Science Foundation–accepted standard across pipes, gaskets, and meters that transport or are exposed to water. If parts of the water sourcing or transport system are not NSF 61 certified, they can introduce potentially harmful contaminants or exceed acceptable levels of molecules like lead and other chemistries.

The list of NSF 61–approved Rilsan® grades and primer combinations is listed in the table below.

Outside of the NSF standard, there are several additional benefits that Rilsan® powder coatings provide for components and accessories involved in water treatment and potable water delivery. We broke down the top three benefits below.
 

Corrosion Resistance​​​​​​

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Water and metal famously do not get along in the long run, and rust formation can lead to serious concerns for water quality and system integrity. If untreated, this rust can run away in a system, creating leaks and loss of flow, and can introduce new sources of contamination. (Suban et al., 2010). The nylon coatings from Rilsan® powders are incredibly strong and resistant to corrosion, even when exposed to the most severe testing environments. Arkema has demonstrated corrosion resistance for their polyamide 11 fine powders over 2,000 hours of salt spray testing and up to 25 years of durability in C4 (very high) and C5 (high) environments.
 
Prevents Biofilm Accumulation

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Water is one of the best mediums to grow bacteria and other microbial organisms. Of course, this is the last thing any of us want to come out of our taps. Not only can it lead to the spreading of pathogens and contamination, but it can also lead to a physical buildup that can reduce flow and clog meters and valves (Pal et al., 2018). Rilsan® coatings provide a smooth, dense surface on the inner walls of pipes and components that greatly inhibits the formation and buildup of these biofilms.
   
Renewable, Biobased Solution

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In addition to providing premier performance and protection, the Rilsan® powders also provide peace of mind, as these products are 100% biobased from naturally derived castor seeds and castor oil. Arkema sources the raw materials from sustainable farms that do not compete with food demand requirements. Rilsan® powders provide an ecologically friendly solution without sacrificing the robust performance of nylon powder coatings.

Rilsan® Grades - Water Approved

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What Components for Water Treatment and Transport Can Be Powder Coated?

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Several components along the water process stream (pun intended) can benefit from using a nylon protective powder coating. Any metal surfaces involved, including pipes, valves, and fittings, are the primary use cases that can be strengthened with Rilsan®. There are also secondary components, such as flow meters, large storage tanks, and gauges, that are typically coated with rubber that can see a performance boost from using a powder coating solution. Similarly, any metal accessory items like brackets, threaded connections, and other fasteners can experience an extended operational life from the corrosion protection offered by a nylon coating.
 

To learn how Rilsan® can be applied, view our other articles below:

• Fluidized Bed Application
• Electrostatic Spray Application
• Surface Pretreatment Process

Citations 
Suban, Marjan, Robert Cvelbar, and Borut  Bundara (2010 ). The impact of stagnant water on the corrosion processes in a pipeline vpliv zastajajo^ih voda v cevovodih na korozijske procese.

Pal, Mahendra, Yodit Ayele, Angesom Hadush, Sumitra Panigrahi, and Vijay J. Jadhav  (2018 ). Public Health Hazards Due to Unsafe Drinking Water. 7(1), 1–6.