Corrosion Solutions

Problems	Solutions	Case Studies	KorrosionGUARD

Treating limescale, corrosion and acidic condensate

As a chemical-free solution to corrosion in water systems, KorrosionGUARD provides building operators with an opportunity to reduce costs and minimise environmental impact - with the peace of mind that their systems are protected. KorrosionGUARD achieves costs savings in the following ways:

• Extends plant life by eliminating corrosion 
• Maintains system efficiency 
• Avoids the need for regular treatment with corrosion inhibitors 
• Fit and forget solution with zero maintenance 
• Remains on stand-by to deal quickly with oxygen entering the system

Fit and forget

KorrosionGUARD provides a 'fit-and-forget' plumbed-in solution to the problems of corrosion in water systems, without the need to apply and regularly top up chemical corrosion inhibitors. As such it offers lower maintenance costs, less down time and reduced expenditure on consumables.

The electrolytic action of KorrosionGUARD uses a zinc anode and a copper cathode to generate a small electric potential, as water flows through the system. This current causes zinc from the anode to be released into the water, where it combines with any oxygen in the water to form zinc oxide. As a result, there is no further oxidation of the metal surfaces in the system and the fine film of zinc oxide that forms on them, provides further protection of these surfaces.

Once all the oxygen has been removed from the system, Korrosion-Guard goes into 'standby mode'. If there is any further ingress of oxygen into the system, however, this automatically reactivates the zinc anode, so the oxygen in quickly removed.

Prevent electrolytic corrosion

KorrosionGUARD also acts to prevent electrolytic corrosion occurring between dissimilar metals in the heating system, such as copper, brass, aluminium alloy and steel. Zinc is lower in the electro-chemical series than any of these other metals, so any electrolytic corrosion currents are concentrated on the zinc anode, rather than the metal elements of the heating system. In engineering terms, this is known as 'cathodic protection'.