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

Table 2

The phase volume percentages obtained from digital image analysis.

Heat treatment	Ageing time (min)	Ferrite phase (vol. %)	Austenite phase (𝛾+𝛾2) (vol. %)	Sigma phase (vol. %)
Solution annealed at 1050°C, 1 h		54.55	45.45	0
Solution annealed at 1050°C, 1 hr + aged at 725°C	100	54	46	0
	316	53.2	46.2	0.6
	1000	32	49	19
	3162	15	52	33
	10000	6	54	40
	31622	0	57	43