What is Corrosion?
Corrosion is the general term used to refer to the degradation of any metal, while “rust” typically refers to corrosion specifically on ferrous metals.
- Corrosion is the gradual degradation of a metal’s properties due to chemical reaction with its environment.
- Corrosion is the natural electrochemical oxidation of metals, and corrosion of most metals in inevitable.
- While corrosion can refer to the degradation of any metal, “Rust” typically refers to corrosion of ferrous (iron based) metals.
Most are probably familiar with what some forms of corrosion looks like, whether its on:
- Manufactured parts in industrial facilities
- Tools at home
- Cars we drive
- Bridges we drive on
Ferrous Metals and Rust
Ferrous metals are metals and alloys that contain iron.
- Examples of ferrous metals include
- Cast iron
- Carbon steel
- Stainless steel
- Other alloy steels
Typically, ferrous metals corrode to form a reddish or brown coating of iron oxide.
Different iron and steel alloys have varying degrees of corrosion risk based purely on their composition.
For example, a cast iron bar and a stainless steel bar will show very different levels of rust if left in saltwater overnight.
Non-Ferrous Metals and Corrosion
Non-ferrous metals encompass essentially the rest of all metals, including alloys that contain less than one percent iron.
Examples of non-ferrous metals include
- As well as alloys like Brass and Bronze.
Non-ferrous metals also corrode to form metal oxides, commonly referred to as tarnish or white rust, depending on the metal type.
An important thing to note is that all metals can corrode if subjected to poor environmental conditions for long enough.
Corrosion Problem? The Zerust Oil & Gas Team is Here to Help!
Zerust Oil & Gas is a world leader in protecting bare metals from corrosion using VCIs and SCIs. Zerust also offers Zerion FVS, a highly cost-effective corrosion mitigation solution for difficult to protect spaces.
The staff at Zerust Oil & Gas are here to custom design a corrosion mitigation solution that is specific to your given asset. Contact us today to find out how we can help extend the life of your equipment.