A new heavy metal free, a low P-content corrosion inhibitor for evaporative cooling systems based on natural organic acids has been developed: Corrsave® 100 is a proprietary substance produced from the reaction of a natural organic acid with a phosphorous compound. It has an improved biodegradability and is classified as inherent biodegradable. It is low toxic, non-mutagenic and non-irritant to skin or eyes. The corrosion inhibition efficiency, as well as properties important for the application in cooling systems, have been studied thoroughly in lab tests and pilot cooling systems. Since the launch of Corrsave® in 2014, these excellent results have been confirmed by numerous successful applications in the field.

1. efficiency for industry
Corrsave® 100
Patented Low-Phosphorus Corrosion Inhibitor

2. Corrsave® 100
2

3. Corrosion inhibitors for cooling systems are based on:
• Phosphates, phosphonates or Zinc
• Drawbacks are the low biodegradability, the heavy metal
content and the contribution to eutrophication
• Due to more an more strict legislation regarding P-limits we
see a growing demand for low-P treatments
3
Corrsave® 100 – Background

4. Newly developed molecule that provides excellent corrosion inhibition &
hardness stabilization
• Based on natural and renewable organic acids
• Readily biodegradable
• High performance compared to state-of-the-art corrosion inhibitors
4
Corrsave® 100 – New Innovative Molecule

5. 5
Corrsave® 100 – Benefits
Readily biodegradable, making it
an environmentally friendly
solution
Excellent corrosion inhibition
within a wide range of water
parameters
Excellent corrosion inhibition of
carbon steel and galvanized
steel
Cost effective solution, savings
possible at comparable
corrosion protection
Excellent performance as
complementary product, e.g.
for Zn/Phosponate treatment
Reduced P-content compared
to high performance standard
inhibitors
Excellent performance,
synergistic effect with standard
phosphonic acid
Additional excellent hardness
stabilization
Competitive advantages vs.
common used treatment (low-P)

6. Corrosion Inhibition in % (soft water)
Excellent corrosion inhibition properties on Steel
6
Corrsave® 100 – Performance Screening
0
20
40
60
80
100
Corrsave® 100 Zinc Phosphonate Phosphate Polyacrylic acid Polyaspartic acid
40 ppm of commercial product;
5 ppm of zinc and phosphate

7. Corrosion Inhibition on Brass in % vs concentration in ppm
7
Corrsave® 100 – Performance Screening
0
20
40
60
80
100
0 10 20
Zinc Copper
• Lab tests state a very
good corrosion
inhibition on
Zinc/galvanized
materials
• Inhibition on copper is
limited  formulated
products need yellow
metal inhibitors

8. Corrosion inhibition in % vs pH
8
Corrsave® 100 – Performance Screening
0
20
40
60
80
100
6 7 8 9
• Corrsave® 100 is only
slightly influenced by
pH variation
• Very stable corrosion
inhibition in the typical
pH range for cooling
applications

9. Chlorine stability in % vs time in hours
9
Corrsave® 100 – Performance Screening
0
20
40
60
80
100
0 1 2 3 4
Corrsave® 100
ATMP
HEDP
HPAA
• Stability against free
chlorine is excellent
• Corrsave® 100 can
be applied under
biocide treatment by
hypochlorite

10. Hardness stabilization in %
10
Corrsave® 100 – Performance Screening
50
60
70
80
90
100
Corrsave® 100 HEDP Polyacrylic acid Polyaspartic acid
Corrsave® 100 has an
outstanding hardness
stabilizing performance

11. Corrsave® 100 and standard phosphonic acid (20 ppm total)
Synergy between Corrsave® 100 and standard phosphonic acid
11
Aktiphos® 4170 – a Corrsave® 100 based product
0
20
40
60
80
100
0 20 40 60 80 100
Aktiphos® 4170
Formulation of:
• Corrsave® 100
• standard phosphonic
acid
• dispersant
• yellow metal inhibitor
(triazole)
t-PO4 [%]: 4.4
Corrosioninhibition[%]
Corrsave® 100 portion [%]

12. Corrosion tests in pilot cooling circuits
Aktiphos® 4170 – a Corrsave® 100 based product
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
0
1
2
3
4
5
6
7
Aktiphos 4170 High Performance
Standard Inhibitor
Low P Formulation
CR[mm/a]
t-PO4[ppm]
t-PO4 [ppm] CR [mm/a]
Excellent corrosion rate
combined with low P
contribution

13. 13
Aktiphos® 4170 / 4171
• Corrosion inhibitor and
hardness stabilizer for
applications with high LSI
• Low-P alternative for
all-organic treatments
Aktiphos® 4180
• Corrosion inhibitor for
systems operating with soft
water
• Low-P alternative for
all-organic treatments
Products based on Corrsave® 100
Aktiphos® 4060
• Corrosion inhibitor based
on Zinc, phosphonate and
CS 100
• Less Zn contribution
• Cost competitive

14. 14
Corrsave® 100 – Where to apply it?
Applications with demand for small environmental footprint
Wide range of application:
• Soft water or “Top-Up”  Corrsave® 100
• High pH and Hardness  Aktiphos® 4170 / 4171
• Soft Water  Aktiphos® 4180
• Combination product with Zinc  Aktiphos® 4060
Open recirculating cooling systems in all types of
industries

15. Successful application in open cooling system of refinery
• Initial state: all-organic treatment
• Problem: strict P-limit allowed only low product dosages
• Solution: effective treatment possible with Corrsave® 100 based product
due to its low P-content
15
Aktiphos® 4170 – Case Study
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
All-organic
(50 mg/l)
Aktiphos 4170
(70 mg/l)
Aktiphos 4170
(60 mg/l)
Aktiphos® 4170 vs.
All-organic treatment
Corrosion Rate [mpy]
Deposit [g / dm]
PO4 contribution [mg / l]

16. Your Benefits:
16
Corrsave® 100 – Summary
Lower your P-contribution to comply with stricter limits
Excellent toxicity and environmental profile
Improvement of existing corrosion protection
Synergistic effect with Zn / phosphonate treatment
Excellent corrosion inhibition in soft water

17. 17
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