Table 3 Concentration of Cr at different sample depths for 50TiO2 film exposed in aqueous Na2CrO4 solution for 14 days at 60 °C.

From: Influence of TiO2 pigment particles on chromate ion transport in epoxy films

Sample depth (µm)a

Cr (wt. %) point 1

Cr (wt. %) point 2

Cr (wt. %) point 3

Cr (wt. %) average

s (±)

3

0.3

0.3

0.1

0.2

0.12

7

0.4

0.5

0.1

0.3

0.21

15

0.5

0.5

0.3

0.4

0.12

30

0.6

0.7

0.5

0.6

0.10

  1. aComposition of the film at different depths is reported up to half of its thickness (30 µm); the film was exposed from both sides, hence the maximum migration distance equals to 1/2 of the film thickness.
  2. The thickness of the film was 60 µm.
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