Corrosion protection of re-bar
The memory®-steel alloy contains about 10% chromium in mass and behaves similarly to a 1.4003 alloy according to DIN EN 10088 (corrosion resistance class I). A known risk associated with prestressing steels is stress corrosion cracking in the presence of high humidity and chlorides, other salts, or acids.
re-bar is placed in a cementitious matrix, which builds a protective alkalinity for the internal reinforcement and shields against penetrating chloride ions. SikaTop® Armatec®-110 EpoCem® is applied as a bonding agent and slight corrosion protection on the re-bar and internal reinforcement.
If sufficient protection cannot be guaranteed with the mortar/concrete covering, additional measures must be taken (e.g. sealing, etc.).
