Techniques have been assessed for estimating corrosion in reinforced concrete structures in chemical environments, and measurements have been carried out in the laboratory at the University of Liverpool and at several different chemical factory sites in China and the UK. If it is possible to make a direct contact to the steel reinforcement, then linear polarisation resistance (LPR) measurement is the most suitable technique to employ. Where it is not possible to make contact with the reinforcement, it has been found that concrete resistivity measurement is a better technique in chemical environments for estimating corrosion than potential measurement or mapping.
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