Zum Kontaktverhalten von feuerverzinktem und unverzinktem Bewehrungsstahl in Beton bei erhöhter Temperatur

Contact behaviour of galvanized and ungalvanized steel in concrete at higher temperature Electrochemical measurements at 60 °C on steel and galvanized steel embedded in cement mortar with and without chloride show that there is no potential reversion between steel and zinc during the test time of 30 weeks. The contact current between steel and zinc is always anodical related to zinc. The current is continually diminishing with time, its value is slightly higher in mortar containing chloride. Contacted steel and galvanized steel therefore leads to a higher zinc loss at least in the starting time. Without contact there is only a small corrosion attack on zinc in both cases of chloride free and chloride containing mortar.