Reduction of Austenite-Ferrite Galvanic Activity in the Heat-Affected Zone of a Gleeble-simulated Grade 2205 Duplex Stainless Steel Weld

•TIG Welding causes significant changes in morphology and chemical composition of the phases in the heat affected zone (HAZ).•Thermo-mechanical simulation was used to study the effects of the thermal parameter on the microstructure evolution in the HAZ.•Electrochemical polarization showed the different passivation behaviour of the phases in the HAZ.•Surface potential surveys revealed the reduction in internal galvanic activity in the duplex HAZ.