The Rust Process

Rust is the common name for a very common compound, iron oxide.


Iron oxide, or its chemical name Fe2O3, is common because iron combines very readily with oxygen.

Iron or steel rusting is a common example of corrosion — an electrochemical process involving an anode, an electrolyte and a cathode. When a piece of metal corrodes, the electrolyte helps provide oxygen to the anode.

As oxygen combines with the iron of the anode, electrons are freed and the anode becomes rusted. When they flow through the electrolyte and try to combine with any free ions.


rust protection


For iron to rust, three things are needed: iron, water and oxygen.

The rust (Iron Oxide) process is in progress

The rust (Iron Oxide) process is in progress due to the manufacturers very poor corrosion protection

Rusty RV sump

Even the engine oil sump can become badly affected by rust


The chemical compounds found in liquids like rain, seawater and the salt-loaded spray from winter roads make them better electrolytes than pure water, allowing their presence to speed the process of rusting on iron and other forms of corrosion on other metals.

To find out more about the CAT System, call LAS Motorhomes on 01604 861999