Study on Durability of Steel Fittings

Part2. An Assessment Method of Corrosion Resistance Focused on Temperature and Humidity inside of Steel Door

Abstract

In former paper, we corroborated that steel doors and sashes corroded internally. This paper describes exposure test of steel door focused on temperatures and humidity. To clear the condition of a progression of internal corrosion, we measured changes in external surface temperatures and internal humidity of steel door in a year. We confirm that surface temperatures of the door on rainy days sometimes falls below dew-point temperature of internal air of the door. It showed there was a high possibility of internal condensation in such condition.