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含Cr钢的CO2腐蚀行为及成膜动力学研究 被引量:7
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作者 李明星 白荣 +3 位作者 忤海龙 苏志浩 杨斌 徐程程 《材料保护》 CAS CSCD 北大核心 2020年第1期8-14,共7页
目前对含Cr钢CO2腐蚀中的产物膜生长动力学过程研究不多。为此,采用高温高压反应釜、动电位极化、电化学阻抗谱、光电子能谱、高分辨拉曼光谱等方法研究了不同Cr含量钢在模拟油井下环境中的CO2腐蚀行为及成膜动力学。结果表明:Cr含量的... 目前对含Cr钢CO2腐蚀中的产物膜生长动力学过程研究不多。为此,采用高温高压反应釜、动电位极化、电化学阻抗谱、光电子能谱、高分辨拉曼光谱等方法研究了不同Cr含量钢在模拟油井下环境中的CO2腐蚀行为及成膜动力学。结果表明:Cr含量的升高会明显降低含Cr钢在模拟CO2腐蚀环境中的腐蚀速率,其中3Cr钢和5Cr钢的腐蚀速率相近,腐蚀速率高于3 mm/a;6Cr钢和7Cr钢的腐蚀速率明显低于3Cr和5Cr钢,腐蚀速率低于1mm/a;腐蚀产物膜成膜过程可以分为2个阶段,阶段1为Cr(OH)3的生长过程,成膜电流I和时间t取对数后满足线性关系;阶段2中随着腐蚀时间的增加,腐蚀电流逐渐增大;产物膜在成膜初期以直接成膜的Cr(OH)3为主,随着腐蚀时间的延长,Cr(OH)3发生溶解,留下的位置被FeCO3沉淀填充。 展开更多
关键词 含Cr钢 CO2腐蚀 产物膜 成膜动力学 Cr(OH)3 成膜电流
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Effects of BYHW Decoction and Its Effective Constituents on the Fluidity of the Cell Membrane in a Stroke-Modeled Rat Brain 被引量:3
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作者 卢景芬 李晨旭 +4 位作者 古力努尔 李廷凤 屠鹏飞 殷俊杰 蔡少青 《Journal of Chinese Pharmaceutical Sciences》 CAS 2002年第4期132-136,共5页
With in vitro spin labeling electron spin resonance (ESR) spectroscopy, we have studied the effects of Bu Yang Huan Wu (BYHW) decoction and its effective constituents such as astragaloside IV ferulic acid, chua... With in vitro spin labeling electron spin resonance (ESR) spectroscopy, we have studied the effects of Bu Yang Huan Wu (BYHW) decoction and its effective constituents such as astragaloside IV ferulic acid, chuanxiongzine, rutin, chlorogenic acid, 9,10 dimethoxy pterocarpane 7 O β D glucoside, calycosin, formononetin, calycosin 7 O glucoside, paeoniflorin, paeonal and quercein on the cell membrane fluidity of a rat brain which was modeled after the dual cervical arteries were intercepted and released for realizing an ischemia reperfusion injury which was selected as a brain stroke model. Our results indicated that the cell membrane fluidity in the model group decreased approximately 8% compared with the control group, and after brain cells were incubatied with species, the membrane fluidity could be recovered closely to the control level depending on the BYHW decoction and its different constituents. As the membrane fluidity is a very sensitive biological index which reflectsd the cell status, our method will be useful to study the molecular mechanism of tradition Chinese medicine (TCM) and its combination recipe. 展开更多
关键词 Bu Yang Huan Wu decoction Brain stroke Cell membrane fluidity ESR
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