Page 457 - Handbook of Materials Failure Analysis
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3 Results 455
3.1.3 Case 3: Identification of the composition of sludge on the surface
of the compressor wall from car air conditioner
In the following case, sludge on the surface of the compressor wall from a car air
conditioner was identified. Figure 17.8a and b shows the fragment of the compressor
wall from the car air conditioner and a magnified view of the sludge allocation on the
surface of the investigated component, respectively. Figure 17.9 shows the pyrogram
of the examined sludge pyrolyzed at 700 °C. The pyrolysis products identified by
using mass spectral library NIST 05 are summarized in Table 17.3. Based on the iden-
tified decomposition products, the sludge was identified as a mixture of SBR,
FIGURE 17.8
(a) Imaging of the compressor wall from the investigated car air conditioner. (b) Imaging of the
sludge on the surface of the compressor wall from the investigated car air conditioner.
