含氯废塑料脱氯反应器内衬材质研究

含氯废塑料在脱氯过程中会产生大量的HCl气体，而HCl具有很强的腐蚀性。本文对（00Crl7Ni14Mo3（316L），0Cr18Ni9Ti（321），1Cr18Ni9（302））奥氏体不锈钢和紫铜4种金属材料及Al2O3陶瓷进行抗HCl气体腐蚀实验，对实验前后的试样进行扫描电镜（SEM）和光谱（EDS）分析，并对Al2O3陶瓷进行了抗热震性实验。结果表明，在4种金属材料中316L不锈钢的抗HCl气体的腐蚀性能最好，通过正交试验研制的Al2O3陶瓷具有良好的抗HCl气体腐蚀性和抗热震性,完全符合含氯废塑料脱氯反应器内衬材质性能要求。     

聚氯乙烯脱氯反应器不锈钢内衬抗腐蚀的研究

聚氯乙烯(PVC)在脱氯过程中会产生大量的HCl气体,而HCl具有很强的腐蚀性.对3种奥氏体不锈钢(00Cr17Ni14Mo3(316L)、0Cr18Ni9Ti(321)、1Cr18Ni9(302))进行抗HCl气体腐蚀实验,并对试样进行扫描电镜(SEM)和能谱(EDS)分析.结果表明:不锈钢316L的抗HCl气体的腐蚀性能最好,在本研究条件下,不锈钢316L最适合用来作PVC脱氯反应器的内衬.     

高速电弧喷涂致密NiCrBSi涂层及其腐蚀行为研究

本文采用改进的电弧喷枪制备了致密Ni Cr BSi涂层,分析了涂层孔隙率及氧元素含量。通过电化学极化曲线和模拟垃圾焚烧环境,对涂层的腐蚀行为进行了分析。研究结果表明,采用改进喷枪,Ni Cr BSi涂层孔隙率及喷涂过程中氧化现象显著降低。自腐蚀电位及自腐蚀电流密度结果显示,涂层的电化学腐蚀性能优于316L不锈钢。高温氯腐蚀动力学进一步证实,Ni Cr BSi涂层腐蚀速率显著低于316L不锈钢。高温氯腐蚀后,元素分析揭示了Ni基涂层具有优良的抗高温氯腐蚀效果。     

氧化铝陶瓷作为脱氯反应器内衬的研究

通过正交试验设计方法,改变坯料配方与烧结制度制得了氧化铝陶瓷,对制备出的Al2O3陶瓷试样进行了物理性能测试和抗热震性能的测定。通过综合评分法对正交试验所得的数据进行分析,对通过正交试验所得最优方案研制出的试样进行了抗HCl腐蚀与抗热震实验,并对腐蚀前后的试样进行扫描电镜与能谱分析。实验结果表明试样4(A2B1C2D3)氧化铝陶瓷最适合作为脱氯反应器内衬材质。     

不锈钢材料在酸溶液中耐蚀性的研究

研究了不锈钢AISI304和1Cr18Ni9Ti在几种酸溶液中的腐蚀特征。这两种不锈钢在HNO3，H2SO4，H3PO4溶液中腐蚀轻微，主要是晶间腐蚀；而在HCl溶液中腐蚀严重。以点蚀为主。不锈钢AISI304的耐蚀性优于1Cr18Ni9Ti，不锈钢中碳的质量分数越低。其耐蚀性能越好。     

新型铸造高合金不锈钢ZHASS—2

研制了HCl＋AlCl3复合介质泵用铸造高合金不锈钢ZHASS－2（0．02C－18Cr－30Ni－10Mo－3Cu－2．5W）。试验结果表明，1150℃×2h水冷的新型铸造不锈钢在60℃，5％HCl＋25％AlCl3复合介质中具有良好的耐均匀腐蚀、晶间腐蚀和点腐蚀性能。且铸造性能良好。     

Cr-Ni奥氏体不锈钢

本文汇集了主要合金元素在Cr-Ni奥氏体不锈钢的作用、扼要介绍了典型Cr-Ni不锈钢的物理、力学、冷成型和耐蚀性。事实上,超低碳奥氏体不锈钢00Cr18Ni10和00Cr18Ni14Mo2(304L和316L)的耐蚀性和冷成型性能显著优于Ti稳定化的奥氏体不锈钢。鉴于这种状况,建议在腐蚀环境中,应该使用超低碳Cr-Ni奥氏体不锈钢(304L)代替目前广泛使用的Ti稳定化不锈钢(321)。     

CeO2对不锈钢基SiO2-BaO-Al2O3-Cr2O3陶瓷涂层性能的影响

采用高温熔烧法于1Cr18Ni9Ti不锈钢基材表面制备掺CeO2的SiO2-BaO-Al2O3-Cr2O3陶瓷涂层,研究了不同含量CeO2对涂层的抗氧化性、抗热震性和硬度的影响。研究结果表明,含CeO2的不锈钢基SiO2-BaO-Al2O3-Cr2O3陶瓷涂层能有效阻止不锈钢基体的氧化增重,提高涂层的抗热震性能及硬度。本实验条件下,CeO2含量2.8%时,涂层具有最好的抗氧化性能和抗热震性能。     

445M铁素体不锈钢缝隙腐蚀性能的研究

研究了445M铁素体不锈钢(%:0.004～0.005C、22.24～22.29Cr、1.10～1.65Mo、0.015～0.016P、0.003～0.004S、0.012～0.016N、0.22～0.38Ti)和316L奥氏体不锈钢(%:0.022C、16.80Cr、10.19Ni、2.02Mo、0.025P、0.001S、0.046N)在40～60℃氯离子浓度(250～5 000)×10^-6的氯化钠溶液的缝隙腐蚀性能。结果表明,445M铁素体不锈钢的耐缝隙腐蚀性能优于316L奥氏体不锈钢;当445M钢中的Mo含量由1.10%提高至1.65%时,钢的耐缝隙腐蚀性能明显提高,表明点蚀当量Cr+3.3Mo是衡量不锈钢耐点蚀和耐缝隙腐蚀的重要指标。     

00Cr18Mo2铁素体不锈钢的耐腐蚀性能研究

00Cr18Mo2铁素体不锈钢具有良好的综合性能,本文就其耐蚀性能进行了研究。研究结果表明,00Crl8Mo2钢在弱蚀性介质中一般耐蚀性良好,抗局部腐蚀特别是抗氯化物应力腐蚀性能优异是此钢最突出的特点。00Crl8Mo2钢在抗点蚀性能方面优于304L而与316L不锈钢相当,退火态00Crl8Mo2钢在含氯化物沸腾溶液中经1000多小时试验而不产生应力腐蚀破裂。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.