Select Page


50 Year Denso Case History; Protecting Steel
Roller System for Water Tanks

Exposed Surface Coatings

Project Data

ProductsDenso Hi-Tack™ Tape

Project Details

In the late 1960’s, SA Water built large capacity water tanks as storage and head of pressure for Whyalla and the surrounding suburbs.

The design of these tanks incorporated a roller system to allow for both thermal and pressure related expansion and contraction. The rollers were set into the concrete and after some 50 years of service the concrete surrounding the rollers has carbonated which has caused the concrete to fail. The concrete areas required repair in order to reinstate the structural integrity of the tank wall.

Upon inspection it was noted that the rollers had been protected using the Denso Petrolatum System. The petrolatum tape was removed to inspect the condition of the steel. The steel under the petrolatum tape was still in perfect condition. In fact, the original stamp used by the SA Water Inspector was still clearly visible. This is a testament that the Denso Paste and Denso Petrolatum Tape were still protecting the steel structure some 50 years down the track. The Denso Tape has been reinstated using Denso Hi-Tack Tape with an Elastomeric topcoat. This updated Denso system is once again designed to provide cost-effective corrosion prevention well into the future.