Sintex® - Corrosion properties for stainless steel sintered components

Corrosion properties for selected Sintex alloys after salt spray test. The tests were performed on tensile test rods manufactured at a compaction pressure of 550 MPa and a sintering temperature of 1220 degrees Celcius for the traditional sintered materials and a sintering temperature of 1260 degrees Celcius for the liquid phase sintered materials. (The tests are performed in accordance with the ISO 9227 and ISO 4628-3 standards).

 

Definition of corrosion Ri0 – Ri5:	Ri0 – 0% rusted surface area	Ri3 – 1 % rusted surface area
	Ri1 – 0,05% rusted surface area	Ri4 – 8 % rusted surface area
	Ri2 – 0,5 % rusted surface area	Ri5 – 40-50% rusted surface area

 

Material	24hrs	48hrs	168hrs	480hrs	672hrs	1008hrs
STX 304L	Ri0	Ri0-1	Ri2	Ri2-3	Ri3	n.a.
STX 316L	Ri0	Ri0-1	Ri1-2	Ri3-4	Ri4-5	n.a.
STX 430L	Ri1	Ri1	Ri5	n.a.	n.a.	n.a.
STX 1000	Ri0	Ri0	Ri0	Ri0	Ri0	Ri0
STX 2000	Ri0	Ri0	Ri0	Ri0	Ri0	Ri0
STX 2507Duplex	Ri0	Ri0	Ri0	Ri0	Ri0	Ri0
STX 316LP*	Ri0	Ri0	Ri0	Ri1	Ri1	Ri1-2
STX 1000LP*	Ri0	Ri0	Ri0	Ri0	Ri0	Ri0
STX 2000LP*	Ri0	Ri0	Ri0	Ri0	Ri1	Ri1

*LP = Liquid Phase sintered materials with an optimum additive level.