Rebar Corrosion Determination

What is Rebar Corrosion Determination?

RCD is a testing method that helps determine the susceptibility of uncoated steel reinforcement to corrosion. The service estimates the electrical potential at intervals in continuous reinforcing steel, and therefore helps quantify the rate at which steel can be expected to oxidise (rust).

Corrosion of reinforcing steel is an electrochemical process, and the behaviour of the steel can be characterised by measuring its half cell potential. The greater the potential, the higher the risk that corrosion is taking place.

An electrode forms one-half of the cell and the reinforcing steel in the concrete the other.

CSI test to ASTM standard C876-09: Standard Test Method for Corrosion Potentials of Uncoated Reinforcing Steel in Concrete.

When would you use Rebar Corrosion Determination?

A client may require RCD when they need to know the susceptibility of reinforcement to corrosion. Any load-bearing element needs to be in good condition to fulfil its role in keeping a structure supported and safe.

What are the Benefits of Rebar Corrosion Determination?

  • Helps quantify reinforcement’s chance/rate of corrosion. By measuring the electrical potential, problem areas can be identified and prioritised
  • Small drill holes make little impact on the construct structure – also easy to repair

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The client needed to drill two core holes through the ferry berth finger arm concrete slab...

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Kurtis and his team showed highly skilled reading of scan results. These allowed them to be the only ones who successfully located the defects (random voids) in Polystyrene blocks filled with concrete and lined with Gib in a prepared area...

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Engaging CSI to conduct the Pile Integrity Testing on the large 1.8m diameter piles was a wise choice. Their technicians were knowledgeable, approachable, punctual, health and safety conscious and flexible when we encountered late changes to the works programme. Results...

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As requested, the workers from CSI ltd contacted this office on arrival at the site and invited me (Kevin J Heays) to site visit and get an understanding of the intended works. I was impressed with the workers knowledge of...

Kevin Heays (ECANZ)

The CSI team were great and they did a good job for us. They were employed to complete QA on a Wellington Apartment Development using Pile Integrity Testing. We would recommend CSI to others in the future.

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CSI did a good job for us at an Auckland Apartment building; saving our team from drilling through services which would have caused considerable delays. We would recommend CSI to others for scanning

Allendale Electrical

CSI provided a great service. We could not advise them on areas of improvement as their service was highly professional.

Wilson Building

We found CSI via their website and were grateful that we had. Their service was highly professional.

Artisan Developments Ltd

CSI have completed several jobs for us. They are highly skilled operators.

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CSI was recommended by a health board, and they did a great job for Q Interiors. We are already looking at employing them for future work.

Q Interiors

The service and follow-up of CSI Ltd was excellent. We would definitely use them again.

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CSI Ltd did a great job for us. When we were asked what improvements could be made, we could think of no gaps in their professional service.

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CSI Ltd were recommended to us and did a great job. We would be happy to recommend them to others.

Stanley Construction

We were recommended CSI by an Engineer and he was absolutely correct; their GM particularly communicated well and was highly professional.

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CSI has completed some exciting projects with Novare Design “I am very impressed at the responsiveness, relevance and accuracy of the testing and data supplied to Novare for some recent strengthening projects. We have worked with CSI on several projects...

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Darren, Ali and the team at CSI have been a great help at the Oaks Shores refurbishment project. CSI was willing to work through the difficulties of travel under various Covid-19 levels, ensuring they could be of assistance in Queenstown...

Brosnan Construction

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