Table 4.

Potentiodynamic polarization parameters in stainless steels passivated at 49 °C, in 5 wt. % NaCl.

Passivated Agent	Stainless Steel	Time (min)	Ecorr (mV)	Epit (mV)	icorr (mA/cm2)	C. R. (mm/year)
Citric Acid	15-5PH	60	−323	42	5.26 × 105	5.54 × 107
		90	−266	147	4.50 × 105	4.75 × 107
	17-4PH	60	−335	91	9.22 × 105	9.64 × 107
		90	−360	97	5.38 × 105	5.63 × 107
Nitric Acid	15-5PH	60	−228	467	2.16 × 105	2.28 × 107
		90	−228	765	2.27 × 105	2.39 × 107
	17-4PH	60	−271	439	3.51 × 105	3.67 × 107
		90	−279	323	4.41 × 105	4.61 × 107