Sample

weight before test (g)

weight after test (g)

rate of corrosion ×10⁻⁵ (g/cm²∙min)

Bare substrate

9.0975

5.7162

19.57

TiO₂

9.0945

6.3181

16.07

WT (0.5)

9.0990

6.2845

16.29

WT (1)

9.0504

6.3375

15.70

WT (2)

9.0725

6.2969

16.06

WT (4)

9.0458

6.3673

15.50

WO₃

9.0741

6.2388

16.41