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Last updated: July 19, 2024

What Does Furfural Mean?

Furfural (C4H3O-CHO) refers to a chemical substance that is heterocyclic in nature, colorless or reddish-brown. It has a strong odor and a high density relative to air. Furfural is a corrosion preventative substance.

Furfural is also known as 2-furaldehyde.


Corrosionpedia Explains Furfural

Furfural can be highly toxic to humans via ingestion, skin absorption or inhalation. However, when carefully applied in its polymer form as a film it can provide superior protection to metals against corrosion.

These polymer films are grown galvanostatically or potentiostatically. The corrosion protection afforded by 2-furaldehyde in its polymer form, polyfurfural (PFy), can be observed on polarization curve data. It is particularly effective on low‐carbon steel surfaces.

The corrosion behavior of carbon steel, stainless steels and titanium alloys in a furfural system can be observed and described via electrochemical methods. The corrosion resistance of 304 stainless steel is the most significant, while that of 1Cr13 stainless steel and carbon steel are the least protected of all materials that have been industrially monitored.

Each material with its corresponding type of corrosion is as follows:

Type of corrosion observed in Furfural systems
Carbon steel
General corrosion
1Cr13 stainless steel
Intergranular corrosion
304 stainless steel
No change




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