稀土在石油机械腐蚀防护上的应用

阐述了稀土结构、性质和作用，综述了稀土在石油机械材料防腐方面的应用研究，解释了稀土提高石油机械材料耐蚀性的机理。     

添加剂

2002058合成酯类油中抗磨添加剂的研究=h—vestigation of antiwear additives for synthetic esters[刊,英]/Ichiro Minami//:Lubrication Engineer--ing一-2002,58(01).一18—22 采用四球试验机研究了有机硫和有机磷型化合物在新戊基类型酯类油中的抗磨性能和机理。试验采用三羟甲基三油酸酯(TMP—O)为基础油,考察添加剂为DBPo、’TBPo、TPPo、’rPPa、DBDS、ZDTP等。研究发现磷酸三酯和二酯都可以起到一定的减磨作用,但是磷酸三酯的减磨作用很小。不同添加剂的有效浓度不同,这可以用其分子在金属表面的吸附活性的差异来解释,…     

超声波气体流量计在水钢焦炉煤气流量测量中的应用

气体能源是钢铁企业广泛使用的能源，但对气体能源流量的测量却存在很大的难度，特别是焦炉煤气流量，其测量难度更大。因为在焦炉煤气中除了含有氢、甲烷、乙烷、乙烯等成分外，还含有焦油、萘、氮的水化合物。这些成分含量虽少，却会产生不利于测量的作用。它们很容易从煤气中分离出来，在管道内壁和管内其它构件表面凝结并聚集起来，使流量测量仪表无法正常工作。如焦油会敷在测量设备的检测元件上，     

High Temperature Oxidation Behavior of La2O3-MosSi3/MoSi2 Composites

The oxidation behavior of 0. 8% La2O3- Mo5Si3/MoSi2 composites at 1200℃ in air was investigated. The results reveal that the oxidation resistance of the material with 0. 8% La2O3 and Mo5Si3 is impaired. The oxidation resistance is decreased with increasing Mo5Si3 content. The mass loss follows a linear law in the initial oxidation. With oxidation time prolonging, a continuous and dense oxidation scale prevents oxygen from diffusing increasing when and leads to mass change a Mo5Si3 content is less than 30%. However, the composite shows ＂PEST＂ with the addition of 40% Mo5Si3. With increasing Mo5Si3 content, the oxidation resistance of 0.8% La2O3- Mo5Si3/MoSi2 decreases. This attributes to the poor oxidation resistance of M05Si3 and the relative density decreasing of 0. 8% La2O3-Mo5Si3/MoSi2 composite.     

Grain Growth Behavior of 5Cr21Mn9Ni4N Steel Micro-Alloyed by Rare Earth

Grain growth behavior of 5Cr21Mn9Ni4NRE steel was experimentally studied at various solid solution treatment temperatures and holding for different times. The experimental results show that the 5Cr21Mn9Ni4NRE steel has the feature of sharp austenite grain coarsening after solid solution treatment at the temperature above 1150 ℃. RE added in the steel has the benefit to restrain grain growth and increase grain growth activation energy.     

Corrosion Inhibition Mechanism with Spilt Cell Technique of Rare Earth Metal on LC4 Al Alloy

A new method of studying the corrosion inhibition mechanism of rare earth metal(REM) on LC4 Al alloy with the spilt cell technique was studied. The principle and experimental method of the spilt cell technique were analyzed. By measuring the change of net-electric current between the two electrodes caused by the change of the amount of oxygen in the solution and the addition of CeCl₃, the influence of corrosive performance of CeCl₃ on LC4 super-power aluminum alloy in the 0.1 mol·L⁻¹ NaCl solution was investigated. Meanwhile, the conditional changes of pH values, CeCl₃ solution, additire and time of performance were also studied. Finally, the features of electrode surface were revealed by using SEM and X-ray energy-dispersive spectrometry (EDS). By combining these with other electric chemical techniques, such as potential-time curve, polarization curve et al.     

ZG稀土铬钼钢的研究

本文论述铬系耐磨材料的化学成分对机械性能的影响,机械性能与冲击磨损性能之间的关系,及稀土元素提高铬钼钢冲击磨损性能的因素。由稀土铬钼钢成型的耐磨件经工业性现场装机试验考核,使用寿命是高锰钢衬板的5倍,是锻制道轨钢板锤的1.9倍。实践证明稀土铬钼钢是具有较好综合性能的耐磨材料,在煤炭、冶金、电力、建材等工业中应用,能获得良好的经济效益。