Scale Dissolution Capacity
Compare the scale dissolving capacity between 20 be’ HCl and various concentrations of HCL
using Compound 360
November, 2013
By: Technician TRE24157
Conclusion:
0.4% vol. % of Compound 360 with 9.9 vol. % of 20 be’ HCL, to water, increases the absorption
capacity of 10% HCl on well scale 18%.
Protocol:
Constituent
Water
20 be’ HCl
Compound 360
(+) TKPP 60%
Beaker 1
900
100
0
0
Beaker 2
897
99.8
4
.2
Beaker 3
946
51.8
2
.2
Units
mls
mls
mls
mls
Incremental grams of well scale were weighed and added to the solution. The weight
increments averaged +/- .49 grams. Once the added scale was completely dissolved, as
evidenced by the release of gaseous molecular oxygen and carbon dioxide, additional
increments of scale was added. Once an added increment of scale was added and there was no
evidence of gaseous molecular oxygen and carbon dioxide, it was determined to be the end
point of the chemical to absorb the scale.
Procedures:
Added Constituents to beaker in the order listed above.
Added scale as noted.
Observations:
Beaker 1 dissolved 4.07 grams of well scale. Beaker 2 dissolved 4.94 grams of well scale.
Beaker 3 dissolved 3.31 grams of well scale. Beaker 1 reaction to added scale seemed rapid at
the beginning and slower towards the end. Beaker 2 and 3 appeared to be a stable dissolution
rate throughout.
Confirmation:
Repeated test using 4 grams of Compound 360, (3.5 mls), 4.0 grams of scale, 150 mls of water
and 10 grams of 20 be’ HCl. In 60 minutes the scale was completely dissolved. Added an
additional 5.7 grams of scale, there was little reaction.
Related Tests:
Scale Dissolution Rate
Corrosion Inhibition Capacity 28-3