Corrosion protection of re-plate
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.
The coating Macropoxy® EG-1 Plus (formerly SikaCor® EG-1 Plus) is applied as standard after the installation of re-plate. The strip is thoroughly cleaned with solvent before installation in accordance with the method statements. After heating, it is cleaned again with warm water, dried and grouted on the sides with Sikaflex® PRO-3 Purform joint sealant to prevent water ingress between concrete substrate and the strip. The coating is applied directly afterwards (two-layer, each 120 µm thick, pore-filling).
If sufficient protection cannot be guaranteed, additional measures must be taken (e.g. sealing, etc.) or the re-bar system must be used.
