耐たい候こう性せい鋼こう

noun

weathering steel; atmospheric-corrosion resistant steel

Technical term in materials engineering for steel that forms a stable rust-like appearance after exposure to weather, eliminating the need for painting.

• この橋はしには耐たい候こう性せい鋼こうが使つかわれている。

  Weathering steel is used for this bridge.