LONG-TERM FIELD TESTS OF REFERENCE ELECTRODES FOR CONCRETE - TEN YEAR RESULTS

This paper presents the results from ten years of stability testing of commercial silver/silver chloride, manganese oxide and graphite embedded reference electrodes used in reinforced concrete structures. Tests were performed in chloride-free and chloride-contaminated slabs exposed to the weather in the northeastern United States. Also included is the effect on potential readings of IR drops caused by corrosion of an embedded rebar.