Scale builds up in your pipework, corrosion eats through your heat exchangers, and biofilm clogs your filters — and none of it needs a single milligram of chemical to start. It’s a physical problem caused by dissolved minerals and bacteria finding a comfortable surface to settle on. Chemical dosing treats the symptom. Magnetic water treatment, as used in the SKW system, changes the physics of the water itself so scale, corrosion, and biofilm never get that comfortable surface in the first place.
This article walks through exactly how that works: the ionic nature of water, the Lorentz force acting on those ions, the resulting drop in dynamic viscosity, and why that drop in viscosity is what actually stops deposits from forming. We’ll also cover where SKW units are used, from agriculture to aviation.
Why Water Scales and Fouls in the First Place
Raw water is never just H2O. As it moves through rock, soil, and pipework, it picks up dissolved ions — calcium (Ca2+), magnesium (Mg2+), bicarbonate (HCO3-), carbonate (CO3^2-), chloride, sulphate, and more. In an untreated system, these ions sit in a random, disordered arrangement, loosely surrounded by water’s own hydrogen-bonded network.
Left alone, calcium and carbonate ions find each other on pipe walls, valve seats, and heat-exchanger surfaces — especially in warm, low-flow zones — and grow into hard, adherent calcite scale (CaCO3). That scale then traps moisture and nutrients underneath it, setting up differential-aeration corrosion cells on the metal surface, and gives bacteria a stable, nutrient-rich base to build a biofilm on. Scale, corrosion, and biofilm are three symptoms of the same root cause: minerals and organisms finding an easy place to stick.
Step 1: Water’s Ions Meet a Magnetic Field
An SKW unit is installed in-line, with the water flowing through a chamber built around a permanent magnetic field. No chemicals, no electricity, no moving parts — the only inputs are the water’s own flow velocity and its dissolved ion content.
As the ion-bearing water moves through this magnetic field, every charged ion in that flow is subject to the Lorentz force: F = qv × B, where q is the ion’s charge, v is its velocity (the water’s flow direction), and B is the magnetic field. Because the field inside the SKW unit is arranged perpendicular to the direction of flow, this force acts sideways on every moving ion — and critically, it acts in opposite directions on positive ions (Ca2+, Mg2+) versus negative ions (HCO3-, CO3^2-, Cl-), because the sign of q flips the direction of the force.
Step 2: The Ions Get “Set in Order”
That sideways, charge-dependent deflection is what “sets the ions in order.” Instead of drifting through the water as a random, disordered soup of cations and anions, the ions passing through the SKW unit’s field are momentarily separated and aligned into ordered bands as they pass through — a brief but real restructuring of how the dissolved charge is distributed in the flow.
Because water molecules themselves are dipolar — each one carries a small positive and negative end, held together in loose clusters by hydrogen bonds — reorganising the ions also disturbs those clusters. The hydration shells that normally form around each ion get reshuffled, and the loosely bonded water clusters that build up around randomly distributed ions get broken apart into a more ordered, less clumped structure. This is the “electromagnetic impulse restructuring molecules” that SKW’s own technical literature describes.
Step 3: Ordered Water Means Lower Dynamic Viscosity
Dynamic viscosity is, physically, a measure of the inner friction between neighbouring molecules as they slide past each other. The more tangled and clustered the water molecules are, the more friction there is between them, and the “thicker” the water behaves at a molecular level.
By breaking up the random hydrogen-bonded clustering and replacing it with a more ordered molecular structure, the SKW process measurably reduces that inner friction — which shows up as lower dynamic viscosity. Lower viscosity also affects related substance values: thermal expansion coefficient, kinematic viscosity, specific thermal conductivity, and thermal diffusivity all shift in a way that improves flowability and wetting. In practice, this is why SKW-treated water flows more easily through a pipe network and wets a surface more thoroughly — the same reason a downstream pump often reaches a better operating point on its curve after an SKW unit is installed.
Step 4: Lower Viscosity Prevents Scale, Corrosion, and Biofilm
This is the part that actually solves the problem. With less inner friction and a more ordered ion distribution, calcium carbonate no longer nucleates and grows as hard, adherent calcite scale bonded directly to a pipe or heat-exchanger wall. Instead, crystallisation shifts toward fine, suspended particles dispersed in the bulk flow, which get carried through the system rather than plating out on a surface.
Because there’s no hard scale layer building up, the pipe wall underneath stays exposed to a consistent water chemistry — removing the trapped-moisture, oxygen-starved pockets that drive under-deposit corrosion. And because biofilm-forming bacteria rely on a stable, adherent base (often a mineral or organic layer) to anchor their EPS matrix, the same reduction in surface adhesion that stops scale also makes it much harder for biofilm to establish itself. Field data from SKW installations shows drainage hoses running a full year without biofilm formation, and sand filters staying free of biological clogging under continuous use.
None of this involves adding a substance to the water. It’s a physical treatment — no chemicals to dose, store, or dispose of, and no consumables to replace.
Applications
SKW units are sized from SKW 100 S up to SKW 6000 S, covering flow rates from roughly 1.2 m³/h to 110 m³/h, with wetted parts built in 1.4571 stainless steel (X6CrNiMoTi17-12-2) and pressure ratings up to 16 bar. The technology is TÜV NORD certified and has been a general supplier to both Airbus and Boeing since 2000 — installed in aircraft central cold-water feed and vacuum toilet systems, where Boeing recognised the company with a Performance Excellence Award.
Beyond aviation, SKW systems are used across:
- Agriculture and horticulture — field sprayers, turf and greenkeeper irrigation, golf course watering, greenhouse and vertical farming/DWC systems, fruit and vegetable washing lines, and livestock drinking troughs
- Industrial and commercial — cooling circuits, evaporators, boiler feedwater, sewage treatment plants, dairy processing, paper mills, aluminium plants, marine vessels, beverage production, and swimming pools
In Malaysia, the same scale, corrosion, and biofilm problems show up across cooling towers, boiler systems, irrigation networks, and process water lines — anywhere hard water and warm operating temperatures combine. Autoflo Technology supplies and supports the SKW system for these applications across Malaysia, sized to match your existing pipe diameter and flow rate.
The Bottom Line
Scale, corrosion, and biofilm all start with the same thing: minerals and organisms finding a stable surface to stick to. The SKW system doesn’t fight that battle with chemicals — it uses the Lorentz force acting on water’s own dissolved ions to reorganise molecular structure, lower dynamic viscosity, and remove the conditions that let deposits form in the first place. For plants in Malaysia running hard water through cooling towers, boilers, or irrigation systems, that means less descaling downtime, longer equipment life, and one less consumable to manage.
Questions about sizing an SKW unit for your system? Reach out to info@autoflotechnology.com.
Frequently Asked Questions
Does the SKW system need electricity or chemicals to work?
No. It’s a passive in-line device with a permanent magnetic field — the only energy input is the water’s own flow. There’s nothing to dose, store, or dispose of.
Will magnetic water treatment remove existing scale that’s already built up?
SKW is primarily a prevention technology. Existing hard scale deposits typically need to be removed by conventional descaling first; the SKW unit then keeps new scale from forming and, over time, many systems see gradual softening of old deposits as bulk crystallisation replaces surface plating.
What size SKW unit does my system need?
Sizing is based on your pipe diameter and flow rate. The range runs from SKW 100 S up to SKW 6000 S, covering roughly 1.2 m³/h to 110 m³/h, connecting via standard pipe thread or flange from DN10 to DN80.
Is the SKW system safe for potable water and food/beverage applications?
Yes. Wetted parts are 1.4571 stainless steel and the process adds nothing to the water — no chemicals, no by-products — which is why it’s used in dairy, beverage, and drinking water applications, including aircraft cold-water systems for Airbus and Boeing.
How is this different from a water softener?
A softener removes hardness ions (calcium, magnesium) from the water via ion exchange, consuming salt and producing wastewater. SKW doesn’t remove anything — it changes how the existing ions behave in the flow, so it needs no regeneration, no salt, and no drain connection.