corrosion inhibitor


corrosion inhibitor

The V A Heating Corrosion Inhibitor is designed to protect your central heating system from corrosion and any build up of sludge. It provides constant protection once fitted and requires no further maintenance or calibration.
It should be fitted only after a thorough cleaning with a chemical cleaner.
Sizes available are 22mm, 28mm and 35mm, all with compression fittings.

How does it work?
The VA Corrosion Inhibitor works by removing dissolved oxygen from the water. A sacrificial anode within the unit reacts with oxygen to form zinc hydroxide. This process effectively eats oxygen. The hydroxide is non corrosive and remains in suspension, also because of its slight alkalinity it can help to balance the ph of the water. The unit will keep on working until all of the dissolved oxygen has been removed from the system, whereupon it will go into standby mode. If more oxygen enters the system then the Inhibitor will start working again.

System corrosion; is oxygen the problem?
Not entirely no.
There are three main types of corrosion in heating systems and these are caused by:
1. the presence of oxygen.
2. galvanic action.
3. acid.
All three of these need to be dealt with to prevent system failure at some point. Acid corrosion is prevented by adding a chemical neutralizer to the system, this should maintain a neutral ph value. Galvanic corrosion happens when dissimilar metals come into contact with each other and is prevented by good system design. Oxygen corrosion (sometimes called "oxygen pitting") is the most difficult to prevent. Traditionally treatment is by means of a liquid chemical agent, but in systems where fresh oxygen is being introduced, protection from this method wears off. A long term treatment can be achieved by fitting a physical corrosion inhibitor.

We do not sell this product directly. Our Corrosion Inhibitor range is marketed through
Salamander Engineering