The fastest way to map corrosion in reinforced concrete
Standards
The Profometer Corrosion PM8500 is based on a technology called "Half Cell Potential". It works by measuring the electrochemical potential difference between a reference electrode and a rebar embedded in the concrete. This...
See MoreUsing the PM8500 provides fast and accurate information about the corrosion potential of reinforced concrete structures. It can help you save money by identifying and mitigating corrosion damage before it becomes...
See MoreSome advantages of using Half Cell Potential to measure concrete corrosion probability are:
The maximum detectable depth is the first rebar layer (or mat). Typically, this corresponds to a maximum rebar cover of 80mm.
The sampling rate of the Profometer PM8500 is 900Hz.
The reference electrode used in a half cell potential corrosion tester is selected based on the specific application and environment being tested. The PM8500 includes a copper/copper (Cu/CuSO4) reference electrode, but...
See MoreFactors that can affect the accuracy of a half cell potential corrosion test include the selection of the reference electrode, the quality of the electrolyte solution, the preparation of the concrete surface being tested,...
See MoreMoisture can have a large effect of the measured potential leading to more negative values. High temperature causes concrete resistivity to be lower, which leads to more negative potentials, while low temperature causes...
See MoreThe potential becomes more positive with increasing concrete cover. Very low concrete cover can lead to more negative potentials, which may indicate higher levels of corrosion. It is recommended to measure the concrete...
See MoreWe always recommend using Profometer PM8000 or GP8x00 to locate the rebar. Once the rebar is located, drill the concrete cover and connect the ground cable to it. The connection should be tested for electrical continuity,...
See MoreThe contact between the pore solution of the concrete and the probe can be impaired by a dried out concrete skin. This can greatly increase the electrical resistivity of the concrete.
It is recommended to moisten the...
See MorePlease, refer and download the Quick Start Guide and the Quick Reference Guide available under the "Download" section of the Profometer PM8500 page.