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Well number pH Conductivity Chemical composition in ppm "a K Ca Mg Fe Li Cl 403 5.22 16400 2880 630 94 0.05 0.80 6.10 5491 424 5.22 10700 1880 390 24 0.01 0.68 3.60 3432 A conventional three electrode electrochemical cell was used to conduct the polarisation tests with the test material as the working electrode, a saturated calomel electrode as reference electrode and a graphite bar as auxiliary electrode.
Microstructure: The steel A-53 B showed a ferritic microstructure with an average grain size of 30 µm and dispersed small pearlite colonies as shown in Figure 3.
Table 4: Corrosion rate of both steels as a function of electrolyte characteristics (mm/y) Well number Bubbled with nitrogen A-53 L-80 403 NO 2.3 2.4 403 YES 2.8 2.5 424 NO 2.4 2.5 424 YES 2.7 2.6 The material collected at the traps of wells 403 and 424 had a Vickers hardness of 652 and 815 respectively.
Microstructure: The steel A53-B presented a ferritic microstructure with small colonies of pearlite with an average grain size of 30 µm.
Ozekcin et al. who showed that the combination of grain size, strain and temperature during welding results in a range of microstructures.

Then, the number of nodes and the topology of nodes should be updated.
It can be seen that large numbers of dislocations are generated through nucleation and multiplication.
With the larger number of random dislocation lines, the dislocation density increase much more quickly and the number of dislocations is also higher over the entire plastic deformation.
The small interstitial loops are difficult to move and to extend or shrink, however, large numbers of them can affect the behavior of dislocation in some extend.
El-Awady, Orientation influence on grain size effects in ultrafine-grained magnesium, Script.

In order to solving the uniformity of rare earth elements during large quantities of doping, and achieving high efficiency production of rare earth electrode material , numbers of professors have research on spray doping systematically.
Sintering easily influences the density, the grain size, distribution of rare earth oxides and high temperature evaporation loss of the material.
Chen Wenge use high-energy ball milling and vacuum sintering technology to preparation of the bulk nanocrystalline W-La2O3 electrode material, and compared with powder metallurgy coarse grain electrodes.
The result shows that the electrical properties of nanocrystalline W-La2O3 electrode are better than the traditional coarse grain powder metallurgy electrodes.
Subsequently, a large number of scholars [1-4,12-16] began to focus on using La2O3, CeO2, Y2O3 to replace of ThO2, wherein the amount of rare earth tungsten oxide about 1% wt-4% wt.

It should be noted that more dendrite formation and fine grain size (as observed from grain size number and average grain diameter) has been observed in case of MMC (composition-I) prepared with Ni.75%-Cr25% (see Fig. 4b) as compared to commercially available MMC (see Fig. 4a) and composition-II i.e.
In the present case study encouraging results have been obtained in terms of grain size number/ grain fineness, hardness in selected composition-I.

The advantages of chrome plating, ironing and the deposition of their alloys are due to the high degree of automation of obtaining coatings of a given thickness, the minimum cost of subsequent machining to size, the elimination of heat treatment on the base metal part, the ability to reduce the cost of repair while simultaneously recovering a large number of parts developed by continuous regeneration of working solutions with return to the production cycle, waste disposal schemes [15, 16, 17].
Higher wear resistance values of chromium precipitates are obtained on non-stationary deposition modes than when direct current, apparently due to the increased hardness and strength of coating crystals with finer-grained structures.
Minimum wear is caused by finer-grained structures and increased micro hardness.
Under loads of 70-80 MPa, the friction coefficient increases sharply as the oil film between the rubbing surfaces breaks and the process of interaction between rubbing surfaces increases, which leads to chipping of grains of considerable size and an increase in abrasive wear.
The advantages of chromium plating, ironing and deposition of their alloys are due to the high degree of automation of obtaining coatings of a given thickness, minimal cost of subsequent machining to size, with the exception of heat treatment on the base metal of the part, the ability to reduce the cost of repair while simultaneously recovering a large number of parts developed by continuous regeneration of working solutions with return to the production cycle and waste disposal schemes.  

The grain size of recycled fine aggregate is 0.5-5.0mm, and the size of recycled coarse aggregate is 5-40mm.
Because the number of activated water molecules is more and the density is larger than ordinary water molecules, the density and the viscosity of mixture also are larger.
Due to the reasons, the speed of grain sinkage significantly reduces and the relative displacement between particles is small.

There are a number of particles in the coating, by the testing of EDS, it was inferred to be ZrO2 because of it’s high melting point.
SEM of the coatings with different contents of ZrO2 It can be see clearly from fig.3a, there is no angular particle in the coating, smaller ball grain shows ZrO2 has been molted and wrapped by molten glass.
However, the content of ZrO2 increased continual, glass phase would be so little that it was hard to link the grain, so that the more holes came into being, through which the oxygen in air was easy to react with the substrate. 2.3.

As visible light accounts for the largest proportion of the solar spectrum ,therefore the development of visible-light-driven photocatalysts has been attracting much attention[6-8].Recently, a great number of novel semiconductor photocatalysts have been carried out for the development of visible-light sensitive photocatalysis such as BaCrO4[9], InVO4[10], Bi2WO6 [11] and so on.
With further increasing temperature to 400℃, XRD patterns of the prepared samples showed sharper,which indicated a better crystallinity and increase in grain size.
Apparently, the crystal size of the samples increased with the calcination temperature, which implied that high temperature favored the stage of the grain growth according to the theory of thermodynamic nucleation and growth.

Introduction In past decades, the fundamental questions regarding sand transport by natural winds generally have been investigated under the assumption of 2-d flow, such as the integrity of existing mass flux relations to wind parameters; the spatial and temporal states of equilibria and disequilibria in transport rates; the partitioning of grain-borne and fluid momentum within a saltation cloud; and etc. [1-3].
Here using the labeled sand images to direct evaluate is unadvisable because the sand images on the picture were actually the images of the transverse motion trajectories of the sand grains during the exposure time of the high-speed camera (Dt =1ms), and especially the sand motions were not along straight line.
The statistical result shows that the first-type trajectories only amount to 3-5% of the total number of the sand trajectories.

The microstructure of deposited layers is determined by the competing influences of substrate (type of material, condition and purity of the surface, texture, grain size) and conditions of applied deposition process.
The changes in the dislocation density in the deposited layer prove to be of similar character [1]. 1 Crystallographic texture is a statistical property of a material with crystalline structure, manifested by the ordering of the spatial orientation of particular crystallites (grains, sub-areas and particles).
Journal Title and Volume Number (to be inserted by the publisher) hexagonal structure (c/a = 1.856), as it follows from its texture, become arranged in such a way that their {112} planes are approximately parallel to the substrate surface.