| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology for preventing or delaying reduction of a protection function of an electric component or a mechanical component including a housing caused by corrosion of the housing.SOLUTION: A ventilation structure (100) includes a metal housing (10) and a ventilation member (30). The metal housing (10) is a housing that requires ventilation, and includes a ventilation hole (12) and a hole peripheral part (14). The ventilation hole (12) is closed by the ventilation member (30). Alumite treatment, aluminum-on-trivalent chromate treatment, aluminum-on-chromium plating treatment or oil repellent treatment is applied to the hole peripheral part (14) that is a portion around the ventilation hole (12). |
