Table 2 Corrosion rate of DI water, 7-pH dissolver and 10.5-pH dissolver on steel coupons.

From: Single step calcium sulfate scale removal at high temperature using tetrapotassium ethylenediaminetetraacetate with potassium carbonate

Fluids

Formulations

Initial weight, g

Final weight, g

Corrosion rate, lbs/ft2/year

DI water

Water

15.09

14.94

3.73

7-pH dissolver

20 wt% K4-EDTA + 5 wt% K2CO3 + KOH as required

15.00

14.94

1.38

10.5-pH dissolver

20 wt% K4-EDTA + 5 wt% K2CO3 + KOH as required

15.24

15.21

0.58

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