Determination of Susceptibility to Intergranular Corrosion of UNS 31803 Type Duplex Stainless Steel by Electrochemical Reactivation Method: A Comparative Study

Table 5

DLEPR test results of 2205 type duplex stainless steel.

Temperature (°C)	Time; (min)	Activation peak potential, 𝐸𝑎; (mV)	Activation peak current density, 𝐼𝑎; (mA/cm^2)	Reactivation peak potential, 𝐸𝑟; (mV)	Reactivation peak current density, 𝐼𝑟; (mA/cm^2)	Passivation current density, 𝐼pass; (mA/cm^2)	DOS (𝐼𝑟/𝐼𝑎×100)
Solution annealed at 1050°C, 1 hr		−212.78	23.1304849	−267.33	0.0063918	0.001448	0.027634
Solution annealed at 1050°C, 1 hr, then aged at 800°C	100	−187.31	24.9231381	−249.84	0.4984630	0.029998	1.9999934
	316	−203.12	39.2419267	−238.16	6.9135766	0.035334	17.617832
	1000	−179.68	44.7944482	−224.01	14.1895596	0.038004	31.677025
	3162	−187.67	42.6067788	−245.27	6.58075448	0.035494	15.680028
	10000	−172.55	57.9448930	−197.77	35.3551309	0.046062	61.015094
	31622	−145.65	69.4685293	−204.05	25.5835941	0.040190	36.827603