How does eucalyptus wood’s high tannin content affect its compatibility with metal fasteners in outdoor trash cans?

Eucalyptus wood's naturally high tannin content poses significant challenges for metal fasteners in outdoor trash cans. Tannins, water-soluble polyphenolic compounds, create an acidic environment that accelerates electrochemical corrosion when combined with moisture. This reaction is particularly aggressive with iron and steel fasteners, causing rapid rust formation that compromises structural integrity. The corrosion process involves tannins acting as natural electrolytes, facilitating oxidation upon contact with metal surfaces. Stainless steel and hot-dip galvanized fasteners demonstrate better resistance, though tannin staining and gradual deterioration remain concerns. Regular maintenance including protective coatings and drainage design modifications can mitigate these effects. Understanding this interaction helps manufacturers develop more durable outdoor storage solutions.