Influence of Deleterious Phases Precipitation in the Corrosion Resistance Measured by Double Loop Electrochemical Polarization Reactivation Test in Superduplex Stainless Steel

被引：5
|
作者：
Pardal, Juan Manuel [1 ]
Maior Tavares, Sergio Souto [1 ]
de Souza, Guttemberg Chagas [1 ]
Cindra Fonseca, Maria da Penha [1 ]
Ponzio, Eduardo Ariel [2 ]
Severo de Macedo, Marcelo Camargo [3 ]
机构：
[1] Univ Fed Fluminense, Programas Posgrad Engn Mecan PGMEC & Montagem Ind, BR-24210240 Niteroi, RJ, Brazil
[2] Univ Fed Fluminense, Dept Fis Quim, Programa Posgrad Quim, BR-24020141 Niteroi, RI, Brazil
[3] Univ Fed Espirito Santo, Programa Posgrad Engn Mecan, Dept Engn Mecan, BR-29060970 Vitoria, ES, Brazil
来源：
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS | 2015年 / 18卷 / 04期
关键词：
superduplex stainless steel; deleterious phases precipitation; corrosion resistance; DL-EPR tests; SIGMA-PHASE; UNS S32750; INTERGRANULAR CORROSION; HEAT INPUT; BEHAVIOR; SUSCEPTIBILITY;
D O I：
10.1590/1516-1439.001614
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This work investigates the influence of deleterious phases precipitation on the corrosion resistance of two wrought superduplex stainless steels UNS S32750 with similar composition, but different grain sizes. Isothermal treatments were carried out to introduce different amounts of deleterious phases, such as chi (chi), sigma (sigma) and secondary austenite (gamma(2)). The specimens were tested by double loop electrochemical potentiodynamic reactivation test (DL-EPR). The kinetics of precipitation in the two steels was different due to the difference of the grain sizes. The results show a correlation between the sensitization degrees, measured by DL-EPR, with the amount of deleterious phases precipitated.
引用
收藏
页码：740 / 747
页数：8
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