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The structure grain boundary becomes more and more blur from inside to outside of the wall.
Table 1 Chemical composition of 30CrMo-M % Batch number C Si Mn P S Cr Mo 090106 0.30 0.24 0.60 0.012 0.003 0.91 0.18 090203 0.29 0.27 0.67 0.010 0.005 0.90 0.18 Test Method.
It can be seen from the diagram that the grain boundary becomes more and more blur from inside to outside.
The structure grain boundary is more and more blur from inside to outside along the wall thickness direction.

The microstructure revealed a considerable change in the grain size and orientation of the Heat Affected Zone (HAZ) in both sides of the weldment than that of the parent metal.
Moreover, severe grain growth has been occurred in heat-affected zone of AISI 310 base metal.
Corrosion Kinetics The corrosion kinetics of specimens with and without molten salt deposits is shown Fig 6 as parabolic plots of weight gain per unit area versus function of time (number of cycles).

The grain size of the PbS thin films and powder was also estimated by XRD.
Quantitative information on the preferential crystallite orientation is obtained from the texture coeifficient TC(hkl) defined as follows [13]: TChkl=I(hkl)Io(hkl)nI(hkl)Io(hkl) ×100% (1) where I(hkl) is the measured relative intensity of a plane (hkl), Io(hkl) is the standard intensity of the plane (hkl) obtained from the (ICCD-PDF4 No. 00-005 0592), and n is the number of diffraction peaks.
The grain size of the PbS powder is less than that of the thin films.

At the first stage of the experiments, the ends of the specimen were ground on skins of different grain sizes and polished.
After compression, the ends of the samples were grinded on abrasive skins of different grain sizes: first on sandpaper No. 180, then 320, 500, 800 and finally 1200, and then polished on a damp cloth with the addition of SOI paste.
The loads on the indenter and the number of indentations were the same as when measuring the micro-hardness of the ends.

A correlation was observed between the magnitude of etching and increase in surface roughness suggesting that a preferential etching occurred, most likely of grain boundary.
While the surface roughness of the HCl-treated NiAl remained similar to that of the as-deposited film (Ra ~0.88 nm), a high number of pits was observed (Figure 3a).
Higher etching is usually accompanied by a higher increase of surface roughness, which in turns suggests a certain preferential etch, likely of grain boundaries of the NiAl film regardless of the pH.

The total atoms number about 300 million, the radius of the nano-ZnO cluster model have five groups are respectively 0.5 nm, 1 nm, 1.5 nm, 2 nm, 2.5 nm.
Table 2 The surface binding energy of interactions of PI/ZnO when the radius of ZnO is 0.8 nm（kcal/mol） R(Zno) （nm） PI/ZnO (Kcal/mol) PI (Kcal/mol) ZnO (Kcal/mol) E Binding energy (Kcal/mol) 0.8 72500.59 73175.32 92.37 767.1 Table 3 The total and surface atomic number of nanometer ZnO clusters model RZnO (nm) Zn atomic number O atomic number the total atoms number Surface atomic number energy of intermolecularbonding between ZnO and P I (kcal/mol) 0.5 1 1.5 2 2.5 24 21 45 27 12.22 179 177 356 106 10.76 597 597 1194 239 4.21 1419 1419 2838 426 2.3 2868 2757 5526 663 1.7 It can be obviously seen from the calculation of the surface binding energy that the intermolecular bonding is formed in nano-ZnO and PI, as shown in Table 3.
The number of surface atoms of different nano-ZnO cluster model can be calculated by using the formula where N is the number of surface atoms, n represents the total number of atoms and r is the radius of cluster model.
In particular, the surface atomic number of nano-ZnO increases along with the nano-ZnO radius increasing, indicating that the increasing of contact surface between the nano-ZnO and PI lead to the surface binding energy increase.
Recent Investigations of Size and Interface Effects in Nanoparticle Composites Nova Acta Leopoldina NF 92, Nr. 340, 9–19 (2005) [4]Li Zhou,Yanwen Tian etc ZnO Grain Size of MC Nylon/nanometer ZnO Compound Material Mechanics Performance.

Table 2 Basic control projects of the reclaimed water quality of agricultural irrigation water Index Irrigation crop types Dryland grain Oil plant crop Fiber Crop Field Vegetables Paddy field Grain BOD5/ mg·L-1 CODCr/ mg·L-1 SS / mg·L-1 80 180 90 100 200 100 40 100 60 60 150 80 DO / mg·L-1 - - ≥0. 5 Fecal coliform bacteria /104 pieces·L－1 4 Total dissovled solids/mg·L-1 Non saline alkali land area is 1000，saline alkali land area is 2000 Number of ascaris egg/piece·L-1pH 6 ～ 9 The reclaimed water processing and irrigation technology The water processing method introduction of the reclaimed water irrigation water Even it is the sewage, according to its own features, it is planned as the industrial wastewater, domestic sewage and other sewage.

Different and cheaper way of increasing the material density was found in applying a perfect grain size composition of the working masses.
Multiple tests were carried out with microsilica, where the diameter of the majority of particles lies in the submicroscopic region, with the grain size values between 0.1 - 0.2 microns.
Acknowledgements This paper has been prepared with the financial support of the project „SUPMAT – Promotion of further education of research workers from advanced building material centre“, registration number CZ.1.07/2.3.00/20.0111, the project is cofunded by European Social Fund and the state budget of the Czech Republic and due to project Alfa TAČR TA02010084 Development of Silica Materials with Optimized Properties with Emphasis on Corrosion Resistance project.

As can be seen, the grain boundaries of Z-S-H Composite sintered at 1200 oC can not be distinguished clearly (Fig. 2b).
Fully dense structure and bigger grains obtained with increasing sintering temperature as seen in Fig.2c.
Acknowledgments This work was financially supported by the Research Fund of Istanbul University with the project numbers: 45692.

In addition, Ce and La had no significant effect on Al grain, mechanism concerning grain coarsening ability and strength remains unclear of A356 alloys [18].
Acknowledgements This research is funded by Fundamental Research Grant Scheme (FRGS), vot number 1422, Ministry of Education, Malaysia.