SEM and EDS Studies

EDS study at location B, at the bottom of a pit showed that location was mainly composed of Cu and Ni with a small amount of Fe, which could be attributed to contamination since Fe was not detected in some other pits. The EDS result indicates no denickelification inside the pit since both Ni and Cu were found, and the crystals appear to be compact with no evidence of any copper crystal deposit or selective nickel dissolution leaving a porous structure. It should also be noted that there was no corrosion product at the bottom of the pit, and there was clear evidence of copper redeposit at the edge of the pit, as indicated in EDS of the copper and oxygen peaks. 

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Based on the results from SEM and EDS studies, it can be concluded that the TS gave the best protection of Al-Mg-Si alloy from the corrosion attack in seawater, following by VL and NH. The protection of passive film is increased with the increasing in inhibitor... 

The authors express their sincere thanks to the following p)eople for their assistance in completing this study Drs. Cliff Todd for profilometry, SEM and EDS analysis Drs. John Blackson, Kalyan Sehanobish and Tony Samurkas for helpful discussions. 

Vallet-Regi, M., Romero, A.M., Ragel, C.V. and LeGeros, R.Z. (1999) XRD, SEM-EDS, and FTIR studies of in vitro growth of an apatite-like layer on sol-gel glasses. Journal of Biomedical Materials Research, 44, 416-421. 

Microscopic examination revealed the pit initiation. Figure 7.37b shows a typical small pit (the size of a pinhole) observed on the inside surface of the tube. It is clear that a layer of deposit can be seen. EDS analysis was carried out in three of the representative locations as shown in Figure 7.37b (i) on the surface of the deposit layer, (ii) inside a pit, and (iii) immediately outside the pit. Higher magnification SEM images revealing details of the bottom the pit are shown in Figure 7.37c and d, respectively. EDS study of location A showed O, Al, Si, Fe and Cl peaks. It is suspected that the deposit layer consists of iron... 

FIGURE 11.9 Electron micrograph images of mobile colloids collected in a series of column studies, deposited on polycarbonate filters, and then (a) metal (AuPd) or (b) carbon coated prior to imaging and EDS analysis with (c) a field-emission SEM. 

The present paper discusses two boiler tests, where sodium-rich plywood was combusted in quartz-free bed material GR GRANULE. The unused bed was frilly amorphous. After initial increase of the crystallinity of the bed material the content of amorphous material started again to grow as the tests proceeded. The content of amorphous material was generally higher in the test I than in the test II and the SEM-EDS studies showed the presence of small agglomerates in the bed of test I. All agglomerates were found to be formed around quartz impurities that were probably left in the boiler as a residue from a previous silica sand bed. 

The deactivated catalyst was studied by several methods scanning electron microscopy (SEM)-energy dispersive spectroscopy (EDS), infrared spectroscopy (IR), and by extracting water-insoluble phosphorus. The SEM-EDS studies gave no useful results. IR absorption was measured on samples that were mulled in mineral oil. Comparisons of IR spectra were made with samples of y -alumina and aluminum phosphate. Determination of total P in the deactivated sample, presumed to be present as water-insoluble aluminum phosphate, was made by standard wet chemical analysis dissolution in hot, dilute HCl followed by colorimetric determination of phosphate. ... 

In this work, we study the mechanical strength of ZrBa-SiC and ZrB2-SiC-C composites. Samples were studied in compression at room temperature, 1400°C and I550°C, in atmospheric air. The degradation of the mechanical properties as a result of atmospheric air exposure at high temperatures has also been studied as a function of exposure time. The microstructure and composition of the as-fabricated and tested materials has been studied by means of Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). 

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