Western Canal Improvements
Western Canal Culvert is located in Tempe, Arizona and carries the Western Canal below Interstate 10 (I-10). This canal is a portion of the Salt River Project (SRP) and its banks are popular with joggers and cyclists.
The Problem
The original section of the culvert and the 1st extension have undergone various repairs over their lifetime due to continued corrosion deterioration of the reinforced concrete.
Corrosion potential measurements and chloride concentration were above threshold values for sections of the soffits and walls of the canal.
Our Solution
We provided bulk anodes in the submerged sections of the culvert for an economical 30-year life extension, as well as Galvashield® XP2 anodes in delaminated areas in the wall to prevent the halo effect.
Where large potential differences in the steel existed, we drilled and installed Galvashield® Fusion® T2 anodes into the soffit.
The Result
The client was able to extend the service life of the canal by 25-30 years with a quick-to-install and maintenance-free design saving future costs compared to other alternatives.
In the high corrosion risk areas, Galvashield® Fusion® T2 provides two-stage protection within a single embedded anode unit.
- Stage 1 ‐ an intense burst of self-generated impressed current strikes the reinforcing steel and passivates rebar corrosion
- Stage 2 ‐ after the impressed current phase, galvanic anodes shield the structure from future corrosion damage
Technology Used
These innovative products and technologies were used on this project.