Abstract
A new anti-corrosion method, removing remaining water inside the cable by injecting and circulating dry air, was introduced to the Akashi Kaikyo Bridge cables for the first time in the world. The superiority of this system was demonstrated by the experiments using cable specimens with and without this system. The dehumidification mechanism of this system was clarified by measuring the volume of dehumidified water from the dry air injected specimen. It was also found from the corrosion tests that corrosion ratio of galvanized wires is accelerated by higher humidity, temperature and volume of attached salt. The service life of galvanized wires is then predicted to be sufficiently long when they are kept under relative humidity under 60% using this dehumidification system.
