What causes crevice corrosion in stainless steel outdoor bar stools?

Crevice corrosion in stainless steel outdoor bar stools occurs due to localized chemical and environmental factors. Stainless steel, though resistant to rust, is vulnerable in tight spaces where oxygen is limited. Common causes include:

1. Moisture Trapping: Water or humidity trapped in crevices (e.g., joints or seams) creates an electrolyte, accelerating corrosion.

2. Chloride Exposure: Salt from coastal air or cleaning agents breaks down the passive oxide layer, leading to pitting.

3. Poor Design: Tight gaps or uneven surfaces promote stagnant liquid accumulation.

4. Galvanic Corrosion: Contact with dissimilar metals (e.g., aluminum) triggers electrochemical reactions.

5. Lack of Maintenance: Dirt or debris in crevices retains moisture, worsening degradation.

To prevent crevice corrosion, choose high-grade stainless steel (e.g., 316 marine-grade), ensure proper drainage, and clean regularly with neutral pH cleaners. Protective coatings or sealants can also help.