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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of the Heat Treatment on the Corrosion Resistance of Duplex Stainless Steels
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Effect of the Heat Treatment on the Corrosion Resistance of Duplex Stainless Steels

机译：热处理对双面不锈钢耐腐蚀性的影响

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摘要

Duplex stainless steels (DSS) are biphasic austenitic-ferritic steels in which the best combination of mechanical and corrosion resistance properties is achieved for an almost equal volume fraction of the phases. In this work, the effect of secondary phases precipitation on the corrosion resistance of four DSS grades (2101, 2304, 2205 and 2507), after isothermal aging in the critical temperature range 750-900 A degrees C, was studied. The corrosion resistance was investigated by potentiodynamic polarization tests in both 0.6 M NaCl solution (pH 7) and in an acid chlorinated solution (pH 3) at room temperature. Moreover, the critical pitting temperature was determined according to ASTM G150. The results showed that secondary phases precipitation mainly influenced the resistance to corrosion of the lean duplex grades.
机译：双相不锈钢（DSS）是双相奥氏体 - 铁素体钢，其中对于几乎等于相位的阶段，实现了机械和耐腐蚀性特性的最佳组合。 在这项工作中，研究了在临界温度范围内450-900℃的等温老化之后，二次相位沉淀对四个DSS等级的耐腐蚀性（2101,2304,2205和2507）的影响。 通过0.6M NaCl溶液（pH7）和室温下的酸氯化溶液（pH3）中的电位偏振试验来研究耐腐蚀性。 此外，根据ASTM G150测定临界点蚀温度。 结果表明，二次相沉淀主要影响贫双链等级的耐腐蚀性。

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