Final Report - Strategic Environmental Research and Development ...

Figure 6.31. EDX maps of primer cross sections by FIB (Deft 02GN084).
Particles in Hentzen 16708 TPE and Sicopoxy 577-630 were identified as described above. In
the BSE image of Hentzen 16708 (Figure 6.32), the brightest particles were identified as BaSO 4
due to the overlap of Ba and S. The size of BaSO 4 particles was about 1 to 3 μm. Overlapping of
Ca and Si confirmed the existence of CaSiO 3 . CaSiO 3 pigments were bright gray. CaSiO 3 is
thought to be the inhibitor, but most of Ca element was far away from the interface, and particles
were isolated from each other. Apparently, no calcium layer formed at the interface at the end of
ninety-day test (Figure 6.33). In terms of the amount of calcium on the cross sectional area, it
was more than praseodymium, but still less than chromium. The area of Si was much larger than
that of Ca. This could be explained by existence of SiO 2 particles, which were dark gray.
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