文摘
A potential probe with a Zn reference electrode embedded in a proper backfill is proposed to monitor cathodic protection The probe allows measuring potential eliminating the ohmic drop contribution, as requested by international standard Backfills are based on a mixture of gypsum, bentonite and cellulose in order to retain water and reduce mass loss Backfills avoid shrinkage and guarantee a good electrolytic contact between zinc electrode and carbon steel plate