Iron Corrosion (Rusting)

4Fe + 3O2 + 6H2O → 4Fe(OH)3

Ikhtisar

Iron corrosion is an electrochemical process where iron is oxidized to Fe²⁺/Fe³⁺ at anodic sites while oxygen is reduced at cathodic sites. The process requires both water and oxygen. The initial Fe(OH)₂ product is further oxidized to Fe(OH)₃, which dehydrates to form rust (Fe₂O₃·nH₂O).

Peserta

Peran Zat Koefisien Keadaan
Reaktan Oxygen O 3 (g)
Reaktan Iron Fe 4 (s)
Reaktan Water H₂O 6 (l)

Contoh Sehari-hari

A car's body rusting over time, iron nails turning orange-brown, and bridge structures corroding all involve this electrochemical process.

Pentingnya dalam Industri

Corrosion costs the global economy over $2.5 trillion annually. Understanding and preventing iron corrosion is critical for infrastructure, transportation, and manufacturing.

Sifat

Jenis
Redox
Dapat Dibalik
Tidak
Energi
Eksoterm
ΔH
-1648,0 kJ/mol

Reaksi Terkait

Iron(II) to Iron(III) Oxidation by Oxygen Bleaching with Sodium Hypochlorite Copper Reduction of Silver Ion Aqua Regia Dissolving Gold Cerium(IV) Reduction by Iron(II) Chlorine Oxidation of Bromide Copper Oxidation by Nitric Acid Hypochlorite Oxidation of Hydrogen Peroxide Hydrogen Peroxide as Oxidizing Agent (Acidic) Displacement of Hydrogen from Acid by Magnesium

Frequently Asked Questions

What is the equation for Iron Corrosion (Rusting)?
The balanced equation is: 4Fe + 3O₂ + 6H₂O → 4Fe(OH)₃.
What type of reaction is Iron Corrosion (Rusting)?
Iron Corrosion (Rusting) is a redox reaction.
Is Iron Corrosion (Rusting) exothermic or endothermic?
Iron Corrosion (Rusting) is exothermic (releases energy). The enthalpy change (ΔH) is -1648.0 kJ/mol.