Buffing工艺对690合金传热管腐蚀性能的影响研究  

Effects of Buffing Process on Corrosion Behavior of Alloy 690TT

作　　者：孟凡江[1] 刘晓强[1] 徐雪莲[1] 

机构地区：[1]上海核工程研究设计院,上海200233

出　　处：《核电工程与技术》2015年第1期17-23,共7页Nuclear Power Engineering and Technology

摘　　要：为研究第三代核电站蒸汽发生器用690合金传热管的加工工艺稳定性和腐蚀性能．利用动电位再活化（EPR）晶间腐蚀和点腐蚀研究方法，对四种不同表面Buffing状态的690合金传热管的晶间腐蚀和点腐蚀性能进行了分析。试验结果表明．Buffing处可明显改善传热管外表面的晶间腐蚀和点腐蚀性能，未Buffing或未均匀Buffing的传热管外表面抗晶间腐蚀和点腐蚀性能略差。这为工程化的传热管采用Buffing工艺提供重要依据。同时，EPR和点腐蚀试验方法对690合金传热管的外表面Buffing状态敏感，结合这两种方法，可快速检测工程应用的传热管外表面加工工艺稳定性。The Electrochemical potentiodynamic reactivation（EPR） and pitting tests were employed for detecting stability of buffing processes for the outer diameter surface of Alloy 690TT tubes used for the third generation of nuclear power stations and effects of buffing on corrosion behavior. Four kinds of tubes with different buffing process were studied in tests. The results show that buffing process significantly improves resistance to intergranular attack and pitting corrosion of the outer diameter surface.The un- buffed surface displayed potential susceptibility of intergranular attack. The test results provide a basis for application of buffing process. EPR test and pitting test are sensitive to different buffing processes, and the test could be used for fast detection of engineering Alloy 690.

关 键 词：690合金传热管 Buffing工艺 电化学再活化法 晶间腐蚀 去应力退火 

分 类 号：TG146.15[一般工业技术—材料科学与工程]