Evaluation of corrosion behavior in artificial saliva of 2507 and 2205 duplex stainless steel

What is it about?

The present study investigates comparison between corrosion behavior of 2507 and 2205 DSS in artificial saliva for orthodontic wires. The heat treatment is necessary for 2507 and 2205 duplex stainless steel to remove or dissolve intermetallic phases, removed segregation and to relieve any residual thermal stress in DSS which may be formed during production processes. The corrosion behavior of a 2507 and 2205 DSS in artificial saliva was studied by SEM, HV test and potentiodynamic measurements. The results indicate that the corrosion resistance mainly depends on presence of secondary phases (sigma phase) and ferrite /austenite ratio, it’s revealed that the corrosion resistance of 2507 DSS higher than 2205 DSS in artificial saliva at 37 °C.

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Why is it important?

Duplex is mainly employed as structural alloy and biomaterial field applications. As concerns the biomedical application, a study confirms that the corrosion characteristics of 2205 DSS are better than those of AISI 316 L stainless steel, especially under potentiodynamic conditions.

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