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

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 + aged at 725°C	100	−178.33	29.2261754	−196.13	1.6857088	0.033688	5.767805
	316	−185.25	26.5737074	−189.43	1.7231466	0.037542	6.484404
	1000	−172.22	42.2727750	−177.35	22.5825614	0.052615	53.421053
	3162	−199.68	54.2137581	−195.70	50.5214698	0.062409	93.189389
	10000	−183.47	55.7856777	−191.11	50.4425582	0.057675	90.422059
	31622	−147.94	69.6430296	−160.30	64.3463484	0.059391	92.394528