Corrosion-Resistant Ultrasonic Atomizers: When to Choose PPS or 316 Stainless Steel

“Can this mist maker atomize my liquid?” is usually the first question we get on a special-liquid project. The honest answer is that the housing material alone cannot tell you. We need to know the liquid, its concentration and what else in the tank will touch it.

A standard water mist maker can work well with clean water and still be the wrong choice for a disinfectant or saline solution. For these projects, PHIMAXX offers MS-02P and MS-10P with PPS components, plus the MS-10S316 with a 316 stainless steel housing and retaining rings. These are different constructions, not interchangeable promises of chemical compatibility.

Start with the liquid, not the head count

Tell us the complete liquid name or formulation, active ingredient, working concentration, pH if known, operating temperature and whether the liquid is used continuously or in batches. A product described simply as “disinfectant” can contain several ingredients. A changing formula also changes the test conditions.

We also need to consider the atomizing discs, retaining rings, level sensor, cable entry, tank, seals and any other wetted parts. The matched power supply is kept outside the liquid and must be selected for the module's electrical requirements. If your application involves aerosolizing a treatment liquid, your team should separately verify the process, exposure controls and applicable requirements; module compatibility does not establish treatment performance or safety.

PPS and 316: what is actually different?

When corrosion resistance is the main concern, PPS is generally the preferred PHIMAXX option. Its broad chemical resistance and non-metallic construction make it a stronger starting point than 316 stainless steel for many oxidizing or chloride-containing liquids. The 316 model remains useful when metal construction is required, but it should not be treated as equal to PPS in every corrosive environment. Neither material is universally resistant: the exact liquid, concentration, temperature and full wet-side assembly still need to be checked.

What the current models can provide

These capacities are from the respective datasheets. They are not a promise of the same output with your formulation. Ask for the individual MS-02P, MS-10P or MS-10S316 datasheet if you need the detailed voltage, dimensions or service interval.

What about HOCl, hypochlorite, saline or hydrogen peroxide?

The PPS model datasheets list selected dilute aqueous disinfectants below 500 ppm, including hypochlorous acid (HOCl), sodium hypochlorite, chlorine dioxide and quaternary ammonium compounds. That is a starting point for discussing a sample, not blanket approval for every product sold under those names. Please confirm the exact formulation and concentration.

The 316 model datasheet mentions low-concentration disinfectants and saline among possible applications, subject to testing. Salt concentration and other ingredients matter. Do not assume that a 3% hydrogen peroxide solution is covered by the PPS datasheet's “below 500 ppm” statement. For hydrogen peroxide or any higher-concentration blend, share the formulation and test a sample under the actual operating conditions before selecting a model.

How to run a useful sample test

1. Use the liquid at the concentration and temperature planned for production, including any routine cleaning fluid.
2. Build the test tank with the intended wetted materials, water-level arrangement, airflow and matched DC supply. An open bucket does not reproduce an enclosed OEM system.
3. Record initial mist output, then check it again after a realistic operating period. Watch for changes to discs, retaining rings, sensor, cable entry and tank components.
4. After cleaning, inspect whether output recovers and whether any consumable parts need replacement. Decide whether the service interval works for your equipment.

If the formula or concentration changes after the test, the earlier result may no longer apply.

Send us these details for a model recommendation

For a practical reply, send: liquid name and concentration; temperature; target mist output; daily operating hours; tank size or drawing; power supply preference; expected quantity; and delivery country. If you have a material compatibility requirement from your customer, include it. We can then narrow the choice to a model and discuss a sample test without guessing from the word “disinfectant.”