Table 1 Electrochemical decay chemical reaction formula of Fe

From: A color prediction model for mending materials of the Yuquan Iron Pagoda in China based on machine learning

Primary battery

Equation of a chemical reaction

Formula

Anodic reaction

Fe → Fe2+ + 2e−

1

Cathodic reaction

1/2O2 + H2O + 2e− → 2OH−

2

Overall reaction

Fe + 1/2O2 + H2O → Fe(OH)2

3

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