(1. 蘇州熱工研究院 壽命管理技術(shù)中心，蘇州 215004；
2. 北京科技大學(xué) 新材料技術(shù)研究院，北京 100083)
摘 要: 將690合金樣品在高壓釜內(nèi)進(jìn)行4400 h含高溫高壓水腐蝕試驗(yàn)，采用掃描電子顯微鏡(SEM)、X射線(xiàn)衍射分析(XRD)、俄歇電子能譜(AES)和拉曼光譜(Raman)等研究690合金在含Pb高溫高壓水中形成的腐蝕產(chǎn)物膜，研究690合金在含Pb溶液中腐蝕產(chǎn)物膜的生長(zhǎng)規(guī)模。結(jié)果表明：690合金在晶界處腐蝕較快，腐蝕形貌呈晶格網(wǎng)狀；腐蝕產(chǎn)物膜中含有Pb，呈外層富鎳內(nèi)層富鉻的雙層結(jié)構(gòu)；腐蝕產(chǎn)物膜主要由Cr2O3、NiFe2O4、NiO等氧化物和Ni2Cr相組成；Pb摻雜于腐蝕產(chǎn)物膜，降低了腐蝕產(chǎn)物膜的保護(hù)性，增加了690合金的腐蝕速度。
關(guān)鍵字: 690合金；高溫高壓；鉛；腐蝕產(chǎn)物膜
（1. Life Management Technology Center, Suzhou Nuclear Power Research Institute, Suzhou 215004, China;
2. Advanced Material and Technology Institute, University of Science and Technology Beijing, Beijing 100083, China）
Abstract:Alloy 690 were put in autoclave to carry out corrosion test in high temperature and high pressure water containing Pb for 4400 h to study the corrosion film growth rule of alloy 690 in the solution containing Pb. The corrosion production film of alloy 690 in high temperature and high pressure water containing Pb was investigated by SEM, XRD, AES and Raman technique. The results show that the corrosion morphology is grain grid for the high corrosion rate of grain boundaries. The corrosion production film is the double layer, the outer layer is rich in Ni and the inner layer is rich in Cr. The corrosion production film is consisted of Cr2O3, NiFe2O4, NiO and other oxides. The new phase of Ni2Cr is found in the passive film formed in Pb-containing solution. Pb in the surface corrosion product leads to the decrease of protectiveness of the passive film and increase of stress corrosion sensitivity.
Key words: alloy 690; high temperature; high pressure; lead; corrosion production film
