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10Bar-pH3-80C 19-Jul-11
Corrosion rate (K x W)!/(A x T x D)
Initial weight(g) Final weight (g) net average
w Mass loss in gram 38.3816 36.6934 1.6882 1.688267
38.3817 36.6934 1.6883
38.3817 36.6934 1.6883
K Constant 8.76E+04 3.45E+06 A Area in Cm2 7.9
T Duration in hrs 13
D Density in g/cm2 7.85
Corrosion rate 183.44 mm/yr
Initial weight(g) Final weight (g) net average
w Mass loss in gram 38.3816 36.7274 1.6542 1.654267
38.3817 36.7275 1.6542
38.3817 36.7273 1.6544
K Constant 8.76E+04 3.45E+06
A Area in Cm2 7.9
T Duration in hrs 13
D Density in g/cm2 7.85
Corrosion rate 179.75 mm/yr
Average 181.6 mm/yr Ref ASTM G31 pg 7 ph
Diameter of the WL specimen 3.2 cm
3.18 cm (measured by calipher)
Surface area (cm2) 7.94202615
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Weight with film= 36.7274 g
36.7275
36.7273
AVE 36.7274 Start immersion
8/19/2011 4:00 AM
w h l1.4 2.35 0.25 Finished
8/19/2011 4:45 PM
(the flow section leaked at 1 pm in which the w
Here 13 hours is taken since the WL specimen
still wet until it was removed at 4:45pm though
w h l
1.4 2.35 0.3
23.4181
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ater was drained out)
was
some water might have drained out.
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80Bar-pH3-80C 12-Aug-11
Corrosion rate (K x W)!/(A x T x D)
Initial weight(g) Final weight (g) net average
w Mass loss in gram 37.1972 35.9053 1.2919 1.291833
37.197 35.9053 1.2917
37.1972 35.9053 1.2919
K Constant 8.76E+04 3.45E+06 A Area in Cm2 7.9
T Duration in hrs 17
D Density in g/cm2 7.85
Corrosion rate 107.34 mm/yr
Initial weight(g) Final weight (g) net average
w Mass loss in gram 37.1972 35.9252 1.272 1.271933
37.197 35.9252 1.2718
37.1972 35.9252 1.272
K Constant 8.76E+04 3.45E+06
A Area in Cm2 7.9
T Duration in hrs 17
D Density in g/cm2 7.85
Corrosion rate 105.69 mm/yr (Befor
Average 106.5 mm/yr Ref ASTM G31 pg 7 ph
Diameter of the WL specimen 3.2 cm3.18 cm (measured by calipher)
Surface area (cm2) 7.94202615
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Weight with film= 35.9252 g
35.9252
35.9252
AVE 35.9252 Start immersion
8/12/2011 5:15 PM
w h l1.4 2.35 0.25 Finished
8/13/2011 9:00 AM
w h l
1.4 2.35 0.3
film removal) Iron count 43.87 mm/yr
23.4181
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10Bar-pH3-25C 26-Jun-11
Corrosion rate (K x W)!/(A x T x D)
Initial weight(g) Final weight (g) net average
w Mass loss in gram 38.2991 38.2041 0.095 0.095233
38.2995 38.2041 0.0954
38.2994 38.2041 0.0953
K Constant 8.76E+04 3.45E+06 A Area in Cm2 7.9
T Duration in hrs 29
D Density in g/cm2 7.85
Corrosion rate 4.64 mm/yr
Initial weight(g) Final weight (g) net average
w Mass loss in gram 38.2991 38.2071 0.092 0.092167
38.2995 38.2074 0.0921
38.2994 38.207 0.0924
K Constant 8.76E+04 3.45E+06
A Area in Cm2 7.9
T Duration in hrs 29
D Density in g/cm2 7.85
Corrosion rate 4.49 mm/yr (before
Average 4.6 mm/yr Ref ASTM G31 pg 7 ph
Diameter of the WL specimen 3.2 cm3.18 cm (measured by calipher)
Surface area (cm2) 7.94202615
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Weight with film= 38.2071 g
38.2074
38.207
AVE 38.20717 Start immersion
6/29/2011 9:21 AM
w h l1.4 2.35 0.25 Finished
6/30/2011 2:30 PM
Iron count 16.43mm/yr
w h l
1.4 2.35 0.3
ilm removal)
23.4181
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10Bar-pH3-50C 18-Jul-11
Corrosion rate (K x W)!/(A x T x D)
Initial weight(g) Final weight (g) net average
w Mass loss in gram 38.2345 37.299 0.9355 0.936433
38.2348 37.299 0.9358
38.237 37.299 0.938
K Constant 8.76E+04 3.45E+06 A Area in Cm2 7.9
T Duration in hrs 21
D Density in g/cm2 7.85
Corrosion rate 62.99 mm/yr Even befor
Could it be
Initial weight(g) Final weight (g) net average
w Mass loss in gram 38.2345 37.5495 0.685 0.685667
38.2348 37.5498 0.685
38.237 37.55 0.687
K Constant 8.76E+04 3.45E+06
A Area in Cm2 7.9
T Duration in hrs 21
D Density in g/cm2 7.85
Corrosion rate 46.12 mm/yr (before film rem
Average 54.6 mm/yr Ref ASTM G31 pg 7 ph
Diameter of the WL specimen 3.2 cm3.18 cm (measured by calipher)
Surface area (cm2) 7.94202615
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Weight with film= 37.5495 g
37.5498
37.55
AVE 37.54977 Start immersion
7/19/2011 4:55 PM
w h l1.4 2.35 0.25 Finished
7/20/2011 2:20 PM
removing with clarke solution, the CR with film would have been high (see below Table)
due the problem of the specimen not being flush-mounted (high local turbulence)?
w h l
1.4 2.35 0.3
val)
23.4181
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10Bar-pH3-80C 12-Jul-11
Corrosion rate (K x W)!/(A x T x D)
Initial weight(g) Final weight (g) net average
w Mass loss in gram 38.692 37.5213 1.1707 1.1711
38.6928 37.5213 1.1715
38.6924 37.5213 1.1711
K Constant 8.76E+04 3.45E+06 A Area in Cm2 7.9
T Duration in hrs 15
D Density in g/cm2 7.85
Corrosion rate 110.28 mm/yr
Initial weight(g) Final weight (g) net average
w Mass loss in gram 6.6321 6.5 0.1321 0.132
6.6322 6.5003 0.1319
6.6322 6.5002 0.132
K Constant 8.76E+04 3.45E+06
A Area in Cm2 7.9
T Duration in hrs 15
D Density in g/cm2 7.85
Corrosion rate 12.43 mm/yr
Average 61.4 mm/yr Ref ASTM G31 pg 7 ph
Diameter of the WL specimen 3.2 cm3.18 cm (measured by calipher)
Surface area (cm2) 7.94202615
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Weight with film= 37.5495 g
37.5498
37.55
AVE 37.54977 Start immersion
7/14/2011 6:15 PM
w h l1.4 2.35 0.25 Finished
7/15/2011 9:20 AM
Experiment was invalid due to mis-installation of specimen (the final WL was for 80b-25 C; noted
down on a wrong page; no WL for 10b-80C was measured yet)
w h l
1.4 2.35 0.3
23.4181
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80Bar-pH3-25C 20-Jun-11
Corrosion rate (K x W)!/(A x T x D)
Initial weight(g) Final weight (g) net average
w Mass loss in gram 38.645 37.5213 1.1237 1.1221
38.6432 37.5213 1.1219
38.642 37.5213 1.1207
K Constant 8.76E+04 3.45E+06 A Area in Cm2 7.9
T Duration in hrs 24.5
D Density in g/cm2 7.85
Corrosion rate 64.70 mm/yr
Initial weight(g) Final weight (g) net average
w Mass loss in gram 38.645 38.5563 0.0887 0.087133
38.6432 38.5562 0.087
38.642 38.5563 0.0857
K Constant 8.76E+04 3.45E+06
A Area in Cm2 7.9
T Duration in hrs 24.5
D Density in g/cm2 7.85
Corrosion rate 5.02 mm/yr (Befor
Average 34.9 mm/yr Ref ASTM G31 pg 7 ph
Diameter of the WL specimen 3.2 cm3.18 cm (measured by calipher)
Surface area (cm2) 7.94202615
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Weight with film= 38.5563 g
38.5562
38.5563
AVE 38.55627 Start immersion
6/22/2011 3:00 PM
w h l1.4 2.35 0.25 Finished
6/23/2011 3:35 PM
w h l
1.4 2.35 0.3
film removal) Iron count 13.29 mm/yr
23.4181
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\\vboxsrv\conversion_tmp\scratch_6\167171753.xlsx.ms_office
L P R
W E I G H T L O S S
I R O N C O U N T
0
5
10
15
20
25
30
35
500 RPM
C o r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
This plot is based on new LPR and iron count data obtained on Sept 14, 2010
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L P R
W E I G H T L O S S
I R O N C O U N T
0
5
10
15
20
25
30
35
500 RPM
C o r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
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1 0 b a r
1 0 b a r
1 0 b a r
1 0 b a r
7 0 b a r
7 0 b a r
7 0 b a r
7 0 b a r
0
5
10
15
20
25
30
35
0 RPM 100 RPM 500 RPM 1000 RPM
C o r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
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p H 3
p H 3
p H 3
p H 3
p H 4 . 1
8
p H 4 . 1
8
p H 4 . 1
8
p H 4 . 1
8
0
5
10
15
20
25
30
35
0 RPM 100 RPM 500 RPM 1000 RPM
C o r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
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2 5 D e g C
2 5 D e g C
2 5 D e g C
2 5 D e g C 5 0
D e g
C 5 0 D e g
C
5 0 D e g
C
5 0 D e g
C
0
5
10
15
20
25
30
35
0 RPM 100 RPM 500 RPM 1000 RPM
C o r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
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L P R
W E I G H T L O S S
I R O N C O U N T
I C M T
D A T A B A S E *
0
5
10
15
20
25
30
35
40
500 RPM
C o r r o s i o n R a t e s ( m m / y e a r )
Rotation Rates (RPM) *at V=1m/s, pH=5 and T=60 oC
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L P R
W E I G H T L O S S
I R O N C O
U N T
0
5
10
15
20
25
30
35
40
500 RPM
C o r r o s i o n R a t e ( m m p e r y e a r )
Rotation Rates (RPM)
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L P R
W E I G H T L O
S S
I R O N C O U N T F
r e e C o r p
D A T A B A S E *
0
5
10
15
20
25
30
35
40
45
500 RPM
C o r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
Comparison of Corrosion Rates from Various Methods; pCO2=70bar;
T=25o C, pH=3
*1-L autoclave; stagnant condition, natural pH (3.07), 25 o C, and pCO2=80bar
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1 0 b a r
1 0 b a r
1 0 b a r
1 0 b a r
F r e e C o r p - 1 0 b a r
F r e e C o r p - 1 0 b a r
F r e e C o r p - 1 0 b a r
F r e e C o r p - 1 0 b
a r
7 0 b a r
7 0 b a r
7 0 b a r
7 0 b a r
F
r e e C o r p - 7 0 b a r
F r e e C o r p - 7 0 b a r
F r e e C o r p - 7 0 b a r
F r e e C o r p - 7 0 b a r
0
5
10
15
20
25
30
35
40
45
0 RPM 100 RPM 500 RPM 1000 RPM
C o r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
Corrosion Rates of X-65 Carbon Steel at Various pCO2 and T=25o C
pH= 3.0
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1 0 b
a r
1 0 b a r
1 0 b a r
1 0 b a r
7 0 b a r
7 0 b a r
7 0 b a r
7 0 b a r
0
2
4
6
8
10
12
14
0 RPM 100 RPM 500 RPM 1000 RPM
C o r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
Corrosion Rates of X-65 Carbon Steel at Various pCO2 and T=25o C
pH= 3.0
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p H 3
p H 3 p
H 3
p H 3
p H 4 . 1 8
p H 4 . 1 8
p H 4 . 1 8
p H 4 . 1 8
0
2
4
6
8
10
12
14
16
18
20
0 RPM 100 RPM 500 RPM 1000 RPM
C
o r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
Corrosion Rates of X-65 Carbon Steel at Various pH's and at T=25o C and
pCO2=10bar
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p H 3
p H 3
p H 3
p H 3
F r e e C o r p - p H 3
F r e e C o
r p - p H 3
F r e e C o r p - p H 3
F r e e C o r p - p H 3
p H 4 . 1 8
p H 4 . 1 8
p H 4 . 1 8
p H 4 . 1 8
F r e e C o r p - p H 4 . 1 8
F r e e C o r p - p H 4 . 1
8
F r e e C o r p - p H 4 . 1
8
F r e e C o r p - p H 4 . 1 8
0
2
4
6
8
10
12
14
16
18
0 RPM 100 RPM 500 RPM 1000 RPM
C
o r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
Corrosion Rates of X-65 Carbon Steel at Various pH's and at T=25o C and
pCO2=10bar
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p H 3
p H 3 p
H 3
p H 3
p H 4 . 1 8
p H 4 . 1 8
p H 4 . 1 8
p H 4 . 1 8
0
5
10
15
20
25
30
35
0 RPM 100 RPM 500 RPM 1000 RPM
C o r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
Corrosion Rates of X-65 Carbon Steel at Various pH's and at T=25o C and
pCO2=10bar
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2 5 D e g C
2 5 D e g C
2 5 D e g C
2 5 D e g C
5 0 D
e g C
5 0 D e g C
5 0 D e g C
5 0 D e g C
0
5
10
15
20
25
30
35
0 RPM 100 RPM 500 RPM 1000 RPM
C
o r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
Corrosion Rates of X-65 Carbon Steel at Various Temperatures and at
pH= 4.18 and pCO2=10bar
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2 5 D e g C
2 5 D e g C
2 5 D e g C
2 5 D e g C
F r e e C o r p - 2 5 D e g C
F r e e C o r p - 2 5 D e g C
F r e e C o r p - 2 5 D e g C
F r e e C o r p - 2 5 D e g C
5 0 D
e g C
5 0 D e g C
5 0 D e g C
5 0 D e g C
F r e e C o r p - 5 0 D e g C
F r e e C o r p -
5 0 D e g C
F r e e C o r p
- 5 0 D e g C
F r e e C o r p
- 5 0 D e g C
0
5
10
15
20
25
30
35
0 RPM 100 RPM 500 RPM 1000 RPM
C
o r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
Corrosion Rates of X-65 Carbon Steel at Various Temperatures and at
pH= 4.18 and pCO2=10bar
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0
5
10
15
20
25
30
35
0 100 200 300 400 500 600 700 800 900 1000
C
o r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
Corrosion Rates of X-65 Carbon Steels at Various pH and Temperatures;
pCO2=10bar
pH 3-25C
pH3-25C-FC
pH4-25C
pH4-25C-FC
pH4-50C
pH4-50C-FC
FreeCorp-pH4-50oC
pH4-50o C
FreeCorp-pH3-25o C
FreeCorp pH4-25C
pH3-25o C
pH4-25C
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Pressure=10 bar Temp=25 C pH=3.14 (adjusted) 80 bar
start "May 13,2010
Corrosion rate (K x W)!/(A x T x D)
Initial weight(g) Final weight (g) net average
w Mass loss in gram 21.5023 20.9361 0.5662 0.566067
21.5023 20.9361 0.5662
21.5019 20.9361 0.5658K Constant 8.76E+04 3.45E+06
A Area in Cm2 15.95
T Duration in hrs 24
D Density in g/cm2 7.85
Corrosion rate 16.50 mm/yr
Initial weight(g) Final weight (g) net average
w Mass loss in gram 22.2742 22.2742 22.27377
22.2737 22.2737
22.2734 22.2734
K Constant 8.76E+04 3.45E+06
A Area in Cm2 15.95
T Duration in hrs 28
D Density in g/cm2 7.85
Corrosion rate 556.56 mm/yr
Average 286.5 mm/yr Ref ASTM G31 pg 7
To calculate the ferrous ion concentrations (Basic idea: weight loss corresponds to th
Molar mass 55.845 g/mole 55.845 g/mole
Volume of solution 0.7 L
A Mole of Fe2+
= Weight loss/molar mass of Iron
0.010136389 mole
0.7 L
[Fe2+
]= 0.014480556 Molar
808.6666667 ppm
B Mole of Fe2+
= Weight loss/molar mass of Iron
0.027543817 mole
[Fe2+
]= 0.03934831 Molar
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31819.66667 ppm
AVE 16314.16667 ppm
Dilution Factor for spectrophometer (iron concentration) Objective: to counterc
to give us aM1 32628.33333 ppm Total ferrous ions in the 700 mL solution f
V1 0.091944629 ml
M2 3 ppm
V2 1000 ml
Take V1 mL of the collected test solution and put it into IL beaker and top it up with deionized water to IL.
Then transfer 10 mL of the diluted solution into sample jars.
Measured ferrous ions 1068 ppm
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Pressure=1Temp=25 C pH=3 (adjusted)
start May 6 @2:15 Feb20@3pm
Corrosion (K x W)!/(A x T x D)
Initial weight(g)
w Mass loss in 22.1778
22.1778
22.1781K Constant 8.76E+04
A Area in Cm2 15.95
T Duration in h 24
D Density in g/ 7.85
Corrosion rate
w h l
2.5 1.24 0.64
FreeCorp=7.7 mm/yr
dissolution of ferrous ions)
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eck whether the calculated ferrous concentration is correct and
n idea how much dilution is required (since the equipment could only read up to 3 ppm.om both specimens
. 1068
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Final weight (g) net average
22.1778 22.1779
22.1778
22.17813.45E+06
mm/yr
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Pressure=10 bar Temp=25 C pH=3.09 (adjusted)
start "May 10,2010
Corrosion rate (K x W)!/(A x T x D)
Initial weight(g) Final weight (g) net average
w Mass loss in gram 22.1302 21.6424 0.4878 0.487633
22.1304 21.6424 0.488
22.1295 21.6424 0.4871K Constant 8.76E+04 3.45E+06
A Area in Cm2 15.95
T Duration in hrs 24
D Density in g/cm2 7.85
Corrosion rate 14.22 mm/yr
Initial weight(g) Final weight (g) net average
w Mass loss in gram 22.2742 22.2742 22.27377
22.2737 22.2737
22.2734 22.2734
K Constant 8.76E+04 3.45E+06
A Area in Cm2 15.95
T Duration in hrs 28
D Density in g/cm2 7.85
Corrosion rate 556.56 mm/yr
Average 285.4 mm/yr Ref ASTM G31 pg 7
To calculate the ferrous ion concentrations (Basic idea: weight loss corresponds to th
Molar mass 55.845 g/mole 55.845 g/mole
Volume of solution 0.7 L
A Mole of Fe2+
= Weight loss/molar mass of Iron
0.008731907 mole
0.7 L
[Fe2+
]= 0.012474153 Molar
696.6190476 ppm
B Mole of Fe2+
= Weight loss/molar mass of Iron
0.031974099 mole
[Fe2+
]= 0.045677285 Molar
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31819.66667 ppm
AVE 16258.14286 ppm
Dilution Factor for spectrophometer (iron concentration) Objective: to counterc
to give us aM1 32516.28571 ppm Total ferrous ions in the 700 mL solution f
V1 0.09226146 ml
M2 3 ppm
V2 1000 ml
Take V1 mL of the collected test solution and put it into IL beaker and top it up with deionized water to IL.
Then transfer 10 mL of the diluted solution into sample jars.
Measured ferrous ions 1068 ppm
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Pressure=1Temp=25 pH=3 (adjusted)
start May 6 @2: Feb20@3pm
Corrosion (K x W)!/(A x T x D)
Initial weight(g)
w Mass loss 22.1778
22.1778
22.1781K Constant 8.76E+04
A Area in C 15.95
T Duration i 24
D Density in 7.85
Corrosion rate
w h l
2.5 1.24 0.64
FreeCorp=7.7 mm/yr
dissolution of ferrous ions)
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eck whether the calculated ferrous concentration is correct and
n idea how much dilution is required (since the equipment could only read up to 3 ppm.om both specimens
. 1068
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Final weight (g) net average
22.1778 22.1779
22.1778
22.17813.45E+06
mm/yr
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L P R
W E I G H T L O S S
I R O N C O U N T
F
r e e C o r p
0
2
4
6
8
10
12
14
16
18
20
500 RPM
C o r r o s i o n R a t e s ( m m p e r y e a
r )
Rotation Rates (RPM)
Comparison of Corrosion Rates from Various Methods at pCO2=10bar, pH=3
and T=25 oC
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L P R
W E I G H T L O S S
I R O N C O U N T
F r e e C o r p
D A T A B A S E *
0
5
10
15
20
25
30
35
500 RPM
C o
r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
Comparison of Corrosion Rates from Various
Methods;pCO2=10bar;pH=4.18, T=50 oC
*at V=1m/s, pH=5 and T=60 oC (K George)
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L P R
W E I G H T L O
S S
I R O N C O U N T F
r e e C o r p
D A T A B A S E *
0
5
10
15
20
25
30
35
40
45
500 RPM
C o r r o
s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
Comparison of Corrosion Rates from Various Methods; pCO2=70bar;
T=25o C, pH=3
*1-L autoclave; stagnant condition, natural pH (3.07), 25 o C, and pCO2=80bar
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L P R
W E I G H T L
O S S
I R O N C O U N T
D A T A B A S E *
0
5
10
15
20
25
30
35
40
0 RPM 500 RPM
C o r r o s i o n R a t e ( m m p e r y e a
r )
Rotation Rates (RPM)
*1-L autoclave: pCO2=80bar; 25 o C, natural pH (3.07), and stagnant condition
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L P R
W E I G H T L O S
S
I R O N C
O U N T
0
5
10
15
20
25
30
35
40
500 RPM
C o r r o s i o n R a t e ( m m p e r y e a
r )
Rotation Rate (RPM)
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Corrosion Rates
50C
0 100 500 1000 0 100
LPR 3.9 4.1 4.9 5.4 3.8
WL 1.7
FreeCorp 7 10.5 14.6 16.6
pCO2=10bar
0 RPM 100 RPM 500 RPM 1000 RPM 0
LPR 7.58523048 7.981975688 9.624445 10.3431 5.886674
7.65618076 7.798760135 9.234532 10.46938 5.808818
MEAN 7.62070562 7.890367911 9.429489 10.40624 5.847746STD DEV 0.05016943 0.12955296 0.27571 0.089295 0.055053
STD ERROR 0.03547514 0.091607776 0.194957 0.063141 0.038928
WL 19
Iron Count 17.43
FreeCorp 7 10.5 14.6 16.6 7
Wang
at 500RPM (pH 3-25 C) at 500RPM (pH 4-25 C)
LPR WL Iron Count FreeCorp LPR WL Iron Count
9.429489 19 17.43 14.6 8.186314 13 19
at 500RPM (pH 3-25 C)
LPR WL Iron Count FreeCorp
0 0 0 at 500RPM (pH 4-25 C)
pH3
25C
pH3
25C
pH3
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LPR 0 RPM 100 RPM 500 RPM 1000 RPM 0
MEAN
STD DEV
STD ERROR
WL 14.22
Iron Count 8
FreeCorp 27.6
Wang
pCO2=70bar
0 RPM 100 RPM 500 RPM 1000 RPM 0
LPR 11.0882618 12.89923865 8.665706 10.13356
10.7378278 9.733695757 11.38264 8.994674
MEAN 10.9130448 11.3164672 10.02417 9.564117
STD DEV 0.24779428 2.238376843 1.921163 0.805314
STD ERROR 0.17521702 1.582771445 1.358467 0.569443
WL 16.5
Iron Count 14
FreeCorp 35.4 37.5 39.7 40.7
Wang 4
0 RPM 500 RPM
LPR 0 10.02417323
WEIGHT LOSS 0 16.5
IRON COUNT 0 14
DATABASE 4 0
pH3
25C
25C
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500 1000 0 100 500 1000
4.4 4.5 3.6 5.1 5.6 6
13 33
7.5 19.8
100 500 1000 0 100 500 1000
7.337953 8.624204 8.754175 19.83187 30.26443 27.91835 30.21365
6.605773 7.748424 8.669878 20.16499 24.46649 28.22467 30.52091
6.971863 8.186314 8.712026 19.99843 27.36546 28.07151 30.367280.51773 0.61927 0.059607 0.235553 4.099764 0.216597 0.217264
0.36609 0.43789 0.042148 0.166561 2.898971 0.153157 0.153629
13 33
19 29
7.3 7.5 7.7 19 19.3 19.8 20
25.5
at 500RPM (pH 4-50 C)
FreeCorp LPR WL Iron Count FreeCorp Database (Keith George * Shih Wang)
7.5 28.07151 33 29 19.3 25.5
25 33 28
pCO2=40bar
pH4
25C 50C
50C
pH4
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100 500 1000 0 100 500 1000
100 500 1000 0 100 500 1000
pH4
25C 50C
25C 50C
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Pressure=10 bar Temp=25 C pH=3 (adjusted)
start March 19@3:35 pm Feb20@3pm
Corrosion rate (K x W)!/(A x T x D)
Initial weight(g) Final weight (g) net average
w Mass loss in gram 22.3907 22.3245 0.0662 0.060317
22.3908 22.34245 0.04835
22.3909 22.3245 0.0664K Constant 8.76E+04 3.45E+06
A Area in Cm2 15.95
T Duration in hrs 24
D Density in g/cm2 7.85
Corrosion rate 1.76 mm/yr pCO2=10 bar; pH=4; T=25 C
Initial weight(g) Final weight (g) net average
w Mass loss in gram 22.2742 21.7468 0.5274 0.526967
22.2737 21.7468 0.5269
22.2734 21.7468 0.5266
K Constant 8.76E+04 3.45E+06
A Area in Cm2 15.95
T Duration in hrs 28
D Density in g/cm2 7.85
Corrosion rate 13.17 mm/yr
Average 7.5 mm/yr Ref ASTM G31 pg 7
To calculate the ferrous ion concentrations (Basic idea: weight loss corresponds to th
Molar mass 55.845 g/mole 55.845 g/mole
Volume of solution 0.7 L
A Mole of Fe2+
= Weight loss/molar mass of Iron
0.001080073 mole
0.7 L
[Fe2+
]= 0.001542961 Molar
86.16666667 ppm
B Mole of Fe2+
= Weight loss/molar mass of Iron
0.006115667 mole
[Fe2+
]= 0.008736668 Molar
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752.8095238 ppm
AVE 419.4880952 ppm
Dilution Factor for spectrophometer (iron concentration) Objective: to counterc
to give usM1 838.9761905 ppm Total ferrous ions in the 700 mL solution f
V1 3.575786815 ml
M2 3 ppm
V2 1000 ml
Take V1 mL of the collected test solution and put it into IL beaker and top it up with deionized water to
Then transfer 10 mL of the diluted solution into sample jars.
Measured ferrous ions 1068 ppm
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Pressure=1Temp=25 pH=3 (adjusted)
start May 6 @2: Feb20@3pm
Corrosion (K x W)!/(A x T x D)
Initial weight(g)
w Mass loss 22.1778
22.1778
22.1781K Constant 8.76E+04
A Area in C 15.95
T Duration i 24
D Density in 7.85
Corrosion 19.39
w h l
2.5 1.24 0.64
FreeCorp=7.7 mm/yr
dissolution of ferrous ions)
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eck whether the calculated ferrous concentration is correct and
n idea how much dilution is required (since the equipment could only read up to 3 ppm.om both specimens
IL. 1068
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Final weight (g) net average
21.5126 0.6652 0.6653
21.5126 0.6652
21.5126 0.66553.45E+06
mm/yr
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1-May-10 Finished on 5/2/2010 10 bar-pH4-50C
Corrosion rate (K x W)!/(A x T x D)
Initial weight(g) Final weight (g) net average
w Mass loss in gram 22.3363 21.009 1.3273 1.327333
22.3365 21.009 1.3275
22.3362 21.009 1.3272
K Constant 8.76E+04 3.45E+06 A Area in Cm2 15.95
T Duration in hrs 28
D Density in g/cm2 7.85
Corrosion rate 33.17 mm/yr
Initial weight(g) Final weight (g) net average
w Mass loss in gram 15.5194 7.8017 7.7177 7.717867
15.5194 7.8013 7.7181
15.519 7.8012 7.7178
K Constant 8.76E+04 3.45E+06
A Area in Cm2 10.44
T Duration in hrs 24
D Density in g/cm2 7.85
Corrosion rate 343.73 mm/yr
Average 188.4Ref ASTM G31 pg 7 ph
To calculate the ferrous ion concentrations (Basic idea: weight loss corresponds to
Molar mass 55.845 g/mole 55.845 g/mole
Volume of solution 0.7 L
A Mole of Fe2+
= Weight loss/molar mass of Iron
0.023768168 mole
0.7 L
[Fe2+
]= 0.033954525 Molar
1896.190476 ppm
B Mole of Fe2+
= Weight loss/molar mass of Iron
0.004070196 mole
[Fe2+
]= 0.005814566 Molar
11025.52381 ppm
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AVE 6460.857143 ppm
Dilution Factor for spectrophometer (iron concentration)
M1 1896.190476 ppmV1 1.582119538 ml
M2 3 ppm
V2 1000 ml
Take V1 mL of the collected test solution and put it into IL beaker and top it up with deionized water t
Then transfer 10 mL of the diluted solution into sample jars.
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w h l1.25 2.5 0.6
w h l
1.2 2.5 0.6
he dissolution of ferrous ions)
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IL.
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10Bar-pH5-50C July 28 2010
Corrosion rate (K x W)!/(A x T x D)
Initial weight(g) Final weight (g) net average
w Mass loss in gram 23.9299 23.4181 0.5118 0.511667
23.9296 23.4181 0.5115
23.9298 23.4181 0.5117
K Constant 8.76E+04 3.45E+06 A Area in Cm2 15.95
T Duration in hrs 26
D Density in g/cm2 7.85
Corrosion rate 13.77 mm/yr
Initial weight(g) Final weight (g) net average
w Mass loss in gram 6.6321 6.5 0.1321 0.132
6.6322 6.5003 0.1319
6.6322 6.5002 0.132
K Constant 8.76E+04 3.45E+06
A Area in Cm2 8.83
T Duration in hrs 24
D Density in g/cm2 7.85
Corrosion rate 6.95 mm/yr
Average 10.4 mm/yr Ref ASTM G31 pg 7 ph
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Weight with film= 23.4633 g
w h l1.4 2.35 0.25
w h l
1.4 2.35 0.3
23.4181
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8-Feb-09
Corrosion rate (K x W)!/(A x T x D)
Initial weight(g) Final weight (g) net average
w Mass loss in gram 5.9837 5.8549 0.1288 0.128367
5.9835 5.8552 0.1283
5.9832 5.8552 0.128
K Constant 8.76E+04 3.45E+06 A Area in Cm2 8.455
T Duration in hrs 24
D Density in g/cm2 7.85
Corrosion rate 7.06 mm/yr
Initial weight(g) Final weight (g) net average
w Mass loss in gram 6.6321 6.5 0.1321 0.132
6.6322 6.5003 0.1319
6.6322 6.5002 0.132
K Constant 8.76E+04 3.45E+06
A Area in Cm2 8.83
T Duration in hrs 24
D Density in g/cm2 7.85
Corrosion rate 6.95 mm/yr
Average 7.0 mm/yr Ref ASTM G31 pg 7 ph
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w h l1.4 2.35 0.25
w h l
1.4 2.35 0.3
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0 RPM
100 RPM
500 RPM
1000 RPM
0
100
500
1000
0
1
2
3
4
5
6
25C
0 RP
100 R
500 R
1000
0
100
500
1000
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0
2
4
6
8
10
12
14
16
18
20
0 RPM 100 RPM 500 RPM 1000 RPM
C o r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates
Corrosion Rates of X-65 Carbon Steel at Various Velocities and pH for
pCO2=10 bar and Temp at 25oC
LPR-PH3
FreeCorp-pH3
LPR-pH4
FreeCorp-pH4
Weight Loss-pH3
Weight Loss-pH4
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0
5
10
15
20
25
30
35
0 RPM 100 RPM 500 RPM 1000 RPM
C o r r
o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates
Corrosion Rates of X-65 Carbon Steel at Various Velocities and
Temperatures for pCO2=10 bar and pH 4
LPR-25 C
FreeCorp-25C
LPR-50 C
FreeCorp-50C
Weight Loss-25C
Weight Loss-50C
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0
5
10
15
20
25
0 100 200 300 400 500 600 700 800 900 1000
C
o r r o s i o n R a t e s ( m m p e r y e a r )
Rotation Rates (RPM)
Corrosion Rates of X-65 Carbon Steels at Various pH and Temperatures;
pCO2=10bar
pH 3-25C
pH3-25C-FC
pH4-25C
pH4-25C-FC
pH4-50C
pH4-50C-FC
FreeCorp-pH4-50oC
pH4-50o C
FreeCorp-pH3-25o C
FreeCorp pH4-25C
pH3-25o C
pH4-25C
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Corrosion Rates
50C
0 100 500 1000 0 100 500
LPR 3.9 4.1 4.9 5.4 3.8 4.4
WL 1.7 13
FreeCorp 7 10.5 14.6 16.6 7.5
0 RPM 100 RPM 500 RPM 1000 RPM 0 100
LPR 3.9 4.1 5 5.4 3 3.8
3.9 4 4.8 5.3 3 3.4
WL 19
FreeCorp 7 10.5 14.6 16.6 7 7.3
25C
pH3
pH3
25C 2
8
10
12
14
16
18
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0
2
4
6
0 RPM 100 R
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1000 0 100 500 1000
4.5 3.6 5.1 5.6 6
33
19.8
500 1000 0 100 500 1000
4.4 4.5 11 13 15 17
4 4.5 11 16 16 17
13 33
7.5 7.7 19 19.3 19.8 20
50C
pH4
C 50C
pH3
pH4
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M 500 RPM 1000 RPM
ree orp