Corrosion control
Corrosion control systems
Patch repair alone carries a known failure mode: the incipient anode effect, where fresh alkaline mortar shifts corrosion activity to the older concrete beside the patch, and new spalls ring the repair within a few years. Corrosion control addresses the electrochemistry itself so the whole element ages more slowly, not just the repaired pocket.
Scope
What this covers
Embedded sacrificial anodes installed at patch perimeters to protect adjacent steel
Surface-applied corrosion inhibitor treatments that migrate to reinforcement depth
Anti-carbonation coating systems restoring a barrier against CO2 ingress
Hydrophobic impregnations reducing chloride and water uptake on exposed faces
Maintenance and re-inspection scheduling matched to each system's service life
Timing
When it's needed
Specified alongside patch repairs on chloride-affected buildings, on coastal facades with decades of salt loading, and wherever an owners corporation wants the long-run cost curve flattened rather than a repeat program each decade. Selection depends on the diagnostic results: inhibitors, anodes and coatings each have conditions they suit.
Concrete dropping from a building is an emergency, not a maintenance item. Cordon off the area beneath any loose or drummy overhead concrete, keep residents and the public clear, and arrange a make-safe inspection immediately: especially for awnings, window hoods and balcony edges above walkways.
Quote variables
What shapes the scope
Chloride and carbonation profile from the investigation stage
Element exposure: sheltered soffits and surf-facing walls need different systems
Compatibility with existing finishes and any heritage constraints
The maintenance horizon the building is planning toward
Concrete remediation on NSW strata and commercial buildings sits within the state's building and design accountability framework: structural repair work should be specified or reviewed by a registered structural engineer, performed by contractors licensed for the work, and documented so the owners corporation holds a proper record. Ask for licence details, engineer registration and product system warranties in writing.
Remediation scopes
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