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that there were two main reactions of the corrosion and displacement in the precoating process, and these two reactions were more obvious in the grain boundary. The electrochemical analysis illustrated that the corrosion and displacement reactions were affected obviously by the current density and the precoating solution temperature, usually the current density was controlled about 0.3 A/dm2......
reactions,which was in an analytical form and incorporated different variables,such as time,temperature,particle size,and hydrogen partial pressure,rate-controlling steps for the dual reactions were obtained with the apparent activation energies calculated to be 90-98 and 115-132 kJ/mol for the first and second reactions,respectively.关键词:......
that there were two main reactions of the corrosion and displacement in the precoating process, and these two reactions were more obvious in the grain boundary. The electrochemical analysis illustrated that the corrosion and displacement reactions were affected obviously by the current density and the precoating solution temperature, usually the current density was controlled about 0.3 A/dm2......
crevice corrosion behavior of 304 stainless steel in NaCl solution has been investigated by a multiphysics coupling model.The model considers local electrochemical reactions,transport of diffe rent......
mixtures.Volume fraction of TiB2 in Ti3SiC2/TiB2 composite can not exceed 10%.Incor-poration of excessive TiB2 will affect the reactions process.TiC and Ti5Si3 were two important in-termediate phases......
for the esterification reactions with maximum yield of 87%.The sulfonated carbonaceous catalyst was readily separated from the reaction solution and keeps approximately equal catalytic activity.The results confirm that the active centre is the hydrophilic sulfonic acid functional group in the esterification reactions.关键词:......
based on synthesis gas, methane, and carbon dioxide offers many routes to industrial chemicals. The reactions related to the synthesis of gas can be classified into direct and indirect approach for making... these barriers, for example, by finding the best catalyst to reduce the high-energy barrier of the reactions and conduct only selective catalyst-surface reactions. The appli- cation of Yttria-Stabilized......
beyond noble metals are highly desirable to lower the energy barriers for oxygen reduction and evolution reactions in a zinc-air battery,while maintaining the good stability in the harsh alkaline......
of Science and Technology, Cheongryang, Seoul, South Korea) Abstract:C1 chemistry based on synthesis gas, methane, and carbon dioxide offers many routes to industrial chemicals. The reactions related..., many experts and researchers are still trying to find the best method to overcome these barriers, for example, by finding the best catalyst to reduce the high-energy barrier of the reactions and conduct......
of superalloys include: the solidification reactions which occur during the solidification, e.g. L → γ + Laves, L → γ + γ ' and L → γ + M3B2; precipitation of carbides, borides, silicides, GCP and TCP phases from the supersaturated γ solid solution; precipitation reactions which occur in the γ ' phase; and the decomposition reactions of MC carbides. Key word: superalloy; phase transformation......
