氧化温度对X80钢氧化膜结构及阻氢性能的影响  

Effect of oxidation temperature on structure and hydrogen-penetration resistance of X80 steel oxide film

作　　者：李贝贝 赵卫民 李守英 孙浩梅[1] 李文昊 LI Bei-bei;ZHAO Wei-min;LI Shou-ying;SUN Hao-mei;LI Wen-hao(School of Materials Science and Engineering,China University of Petroleum,Qingdao 266580,China;School of Mechanical and Electronic Engineering,Qingdao Binhai University,Qingdao 266555,China)

机构地区：[1]中国石油大学(华东)材料科学与工程学院,山东青岛266580 [2]青岛滨海学院机械电子工程学院,山东青岛266555

出　　处：《材料热处理学报》2020年第10期86-94,共9页Transactions of Materials and Heat Treatment

基　　金：山东省自然科学基金(ZR2017MEE005)。

摘　　要：利用扫描电镜、X射线衍射、显微激光拉曼光谱等研究了300~600℃不同氧化温度下X80钢氧化膜的结构特征和相组成,通过电化学氢渗透实验获得了带氧化膜钢样的氢渗透稳态电流和穿透时间,以此建立了不同氧化温度下的氢渗透模型,用参数φ_f/φ_m来定量分析氧化膜的阻氢性能。结果表明:氧化膜的阻氢性能受氧化膜的厚度和膜结构的共同影响。在300℃氧化得到的X80钢氧化膜致密均匀,φ_f/φ_m值是其他温度的2倍,阻氢性能最好,但膜厚度小;500℃氧化膜有少量微孔导致φ_f/φ_m值降低,但与基体结合紧密且厚度大,总体阻氢效果最好。400℃氧化膜有裂纹和孔洞,600℃氧化膜易脱落,均不能作为有效阻氢层。Microstructure and phase composition of oxide film of X80 steel after oxidation at 300-600 ℃ for 2 h were studied by means of scanning electron microscopy, X-ray diffraction and microscopical laser Raman spectroscopy. The steady-state current and penetration time of hydrogen permeation of the steel samples with oxide film were obtained by electrochemical hydrogen permeation experiment, and the hydrogen permeation model at different oxidation temperatures was established, and the hydrogen-penetration resistance of the oxide film was quantitatively analyzed by parameter φ_f/φ_m. The results show that the hydrogen-penetration resistance of the oxide film is affected by the thickness and structure of the oxide film. The oxide film of the X80 steel obtained by oxidation at 300 ℃ is dense and uniform, the φ_f/φ_m value is 2 times that at other temperatures, and the hydrogen-penetration resistance is the best, but the film thickness is small. The oxide film obtained by oxidation at 500 ℃ has a small number of micropores leading to the decrease of the φ_f/φ_m value, but the bonding with the matrix is tight and the thickness is large, and the overall hydrogen-penetration resistance effect is the best. The oxide film obtained by oxidation at 400 ℃ has cracks and holes, and the oxide film obtained by oxidation at 600 ℃ is easy to fall off and cannot be used as an effective hydrogen resistance layer.

关 键 词：X80钢 氧化膜 氢渗透模型 阻氢性能 

分 类 号：TG142.3[一般工业技术—材料科学与工程]