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

Table 2

The phase volume percentages obtained from digital image analysis.

Heat treatment	Ageing time; (min)	Ferrite phase; (vol. %)	Austenite phase (γ + γ 2); (vol. %)	Sigma phase; (vol. %)
Solution annealed at 1050°C, 1 hr		54.55	45.45	0
Solution annealed at 1050°C, 1 h +; aged at 800°C	100	49	46.4	4.6
	316	26.7	51.3	22
	1000	1.8	54.5	43.7
	3162	0.7	55	44.3
	10000	0	55	45
	31622	0	55	45