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Table 3 Parameters of potentiodynamic polarization results cast iron in 3.5 wt% NaCl in the absence and presence of polyurethane at ambient temperature

From: Fortification performance of polyurethane coating in outdoor historical ironworks

Conc., (M) βa (V/decade) βc (V/decade) icorr (mA cm−2) Ecorr (mV) I.E (%)
Blank 0.191 0.364 9.81 − 1.24 V
1% 0.161 0.252 1.72 − 946.2 83.7
2% 0.113 0.241 1.51 − 633.4 94.8