March 30, 2016 admin

Prevent Corrosion in a heating system

Prevent Corrosion in heating systems

A typical heating system contains various metallic elements like steel, copper, aluminium, iron etc. which are prone to corrosion. Corrosion is natural in heating systems and can cause problems. Corrosion of these metals determines the lifespan of your heating system and therefore knowing how these materials are vulnerable is important to prevent corrosion in your heating system. Let us take a look at how these different metals corrode and strategies to prevent  corrosion:


Copper is quite easily corroded. When it corrodes,  tiny amounts of copper dissolve in water, which lead to the corrosion of other metals in the system. Its corrosion can cause equipment failure. When it is brought into contact with aerated water, it only corrodes slightly. The problems occur when the corrosion goes beyond this. Continued copper corrosion can cause green stains. It is quite necessary to prevent corrosion of copper if you want to increase the life of your heating system.


Aluminium is also a very important metal in the heating systems. Its corrosion also has to be avoided at all costs. It is quite inexpensive and therefore is used in a lot of heating systems including boilers and radiators. It has a protective film of surface oxide, which is its shield against corrosion. But destruction of this shield by harmful contaminants can cause corrosion. Not only harmful contaminants, this shield is also vulnerable to changes in the pH value of the water. For aluminium to minimise corrosion, the pH value of water must be levelled between 6.5 and 8.5. Its corrosion occurs in small localised areas which form pits on the metal surface. For your heating system to work properly, corrosion of aluminium has to be taken into account.


Steel is an essential component of your heating system. It is easily corroded in the presence of oxygen and water. An iron oxide debris is formed which is splinted into the system water and this deteriorates valves and other moving parts. As a result, a localised corrosion occurs that leads to equipment failure.

Stainless steel is an alloy that has a protective oxide layer that prevents it from corrosion. However, aggressive contaminants can penetrate its layers too.

Protecting your heating systems

Being vulnerable to corrosion, heating systems can easily malfunction if proper care is not taken. Here are some steps that you can take to prevent corrosion in your heating systems:

  • Make sure that regular maintenance of your heating system is carried out. It is quite helpful in reducing contamination issues such as flux residues. Giving proper care to your system, you can easily prevent corrosion and improve the life of your heating system.
  • In addition to proper maintenance and cleaning of your heating system, you can also use some effective corrosion inhibitor. Using corrosion inhibitor can decrease the rate of corrosion in your heating system.
  • The inhibitor has to be used in accordance with the appropriate dose. This will ensure the proper functioning of your heating system.


Further information on how to prevent corrosion can be found here.