抄録
The corrosion protective property of various covering materials of steels for retaining wall was investigated by the electrochemical measurements and the weight loss test for five years. Moreover, the early evaluation of the corrosion protective property in various corrosion environments was also examined by the room test. In the field test, the aluminum spray coating on steel plate and the nontar epoxy paint on bolt nut showed the best corrosion protective property for five years, because their appearances were little change and the weight loss was small. The corrosion protective property of anchor was enhanced by using jointly together with the catholic protection. On the other hand, in the room test of various corrosion environments, the aluminum spray coating on steel plate showed the best corrosion protective property as well as the result obtained in the field test. But the cheapest hot dip galvanizing on steel plate did not last the excellent corrosion protective property in sea sand of the severest environment. The corrosion protective property of uni-chrome plating on bolt nut did not appreciably last in sea sand.
