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    不銹鋼鋼管應(yīng)用中的低溫敏化及其抗敏化性能掌控新識(shí)(下)

    Low Temperature Sensitization as Encountered with Applications of Stainless Steel Tube and New Expertise for Controlling of Sensitization Resistance thereof(PartⅡ)

    • 摘要: 匯總分析了美國、歐洲、日本、我國不銹鋼鋼管標(biāo)準(zhǔn)中所涉及的耐腐蝕試驗(yàn)條款及差異，闡述了不銹鋼鋼管晶間腐蝕檢驗(yàn)方法、形成機(jī)理、影響因素；對不銹鋼鋼管在核電應(yīng)用過程中，經(jīng)長期高溫環(huán)境服役后出現(xiàn)的晶間應(yīng)力腐蝕開裂引發(fā)的“低溫敏化”現(xiàn)象及由此帶來的抗敏化性能進(jìn)行探討。指出不銹鋼的晶間腐蝕性能已是完全可由制造過程掌控的耐腐蝕性能，只要不銹鋼的化學(xué)成分和加工過程或熱履歷符合要求，即可對其晶間腐蝕性能作出明確評(píng)估。

       

      Abstract: Summarized and analyzed are the terms concerning corrosion resistance test as specified under the stainless steel tube/pipe standards of USA，Europe，Japan and China，and the differences.Elaborated are the testing methods for，formation mechanisms of，and factors affecting intergranular corrosion of the stainless steel tube/pipe. Discussed are the low temperature sensitization of the nuclear power plant-serving stainless steel tube which is caused due to IGSCC developed after a rather long period of operation under high temperature condition，and the related sensitization resistance.It is pointed out that the intergranular corrosion performance of the stainless steel can be definitely controlled during the manufacturing process.Provided that the chemical composition，the processing procedure or the thermal history of the stainless steel are up to relevant requirements，its intergranular corrosion performance can be explicitly evaluated.

       

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