Acta Metallurgica Sinica (English Letters) ›› 2019, Vol. 32 ›› Issue (12): 1483-1489.DOI: 10.1007/s40195-019-00902-6
• Orginal Article • Previous Articles Next Articles
Yu-Peng Sun1, Chun-Tian Yang2, Chun-Guang Yang3, Da-Ke Xu2(), Qi Li1(), Lu Yin3, Cheng-Shuo Qiu2, Dan liu2, Ke Yang3
Received:
2019-01-30
Revised:
2019-03-20
Online:
2019-12-10
Published:
2019-11-25
Yu-Peng Sun, Chun-Tian Yang, Chun-Guang Yang, Da-Ke Xu, Qi Li, Lu Yin, Cheng-Shuo Qiu, Dan liu, Ke Yang. Stern-Geary Constant for X80 Pipeline Steel in the Presence of Different Corrosive Microorganisms[J]. Acta Metallurgica Sinica (English Letters), 2019, 32(12): 1483-1489.
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C | Si | Mn | Mo | Ni | Cu | Cr | V | P | S | Fe |
---|---|---|---|---|---|---|---|---|---|---|
0.03 | 0.28 | 1.90 | 0.22 | 0.29 | 0.20 | 0.08 | 0.03 | 0.03 | 0.01 | Bal. |
Table 1 Chemical composition of X80 pipeline steel
C | Si | Mn | Mo | Ni | Cu | Cr | V | P | S | Fe |
---|---|---|---|---|---|---|---|---|---|---|
0.03 | 0.28 | 1.90 | 0.22 | 0.29 | 0.20 | 0.08 | 0.03 | 0.03 | 0.01 | Bal. |
Fig. 1 SEM images of X80 pipeline steel coupon surface in the presence of three bacteria for 7 days: aP. aeruginosa, bA. aceti, cD. vulgaris and 14 days: dP. aeruginosa, eA. aceti, fD. vulgaris. The insets are taken at ×600 for biofilm
Fig. 2 EDS results of coupons in different culture media after 14 days: a bare X80 pipeline steel coupon surface, bP. aeruginosa biofilm, cA. aceti biofilm, dD. vulgaris biofilm
C | N | O | P | S | Cr | Mn | Fe | |
---|---|---|---|---|---|---|---|---|
a | 14.43 | 2.00 | 0.64 | - | 0.02 | 0.12 | 1.73 | 81.16 |
b | 39.29 | - | 37.67 | 3.72 | 0.12 | 0.02 | 0.32 | 18.86 |
c | 43.71 | 2.08 | 36.33 | 2.94 | 0.24 | 0.09 | 0.38 | 14.23 |
d | 73.00 | - | 21.56 | 0.22 | 2.77 | - | 0.01 | 2.44 |
Table 2 Chemical composition (at.%) of biofilms on the coupon surfaces after 14 days determined by EDS: a bare X80 pipeline steel coupon surface, bP. aeruginosa biofilm, cA. aceti biofilm, dD. vulgaris biofilm
C | N | O | P | S | Cr | Mn | Fe | |
---|---|---|---|---|---|---|---|---|
a | 14.43 | 2.00 | 0.64 | - | 0.02 | 0.12 | 1.73 | 81.16 |
b | 39.29 | - | 37.67 | 3.72 | 0.12 | 0.02 | 0.32 | 18.86 |
c | 43.71 | 2.08 | 36.33 | 2.94 | 0.24 | 0.09 | 0.38 | 14.23 |
d | 73.00 | - | 21.56 | 0.22 | 2.77 | - | 0.01 | 2.44 |
Fig. 3 Largest pit depth measured by CLSM on the coupon surface of X80 pipeline steel in the presence of three bacteria for 14 days: aP. aeruginosa, bA. aceti, cD. vulgaris
Pit depth | P. aeruginosa broth | A. aceti broth | D. vulgaris broth |
---|---|---|---|
Largest pit depth (μm) | 6.9 | 7.4 | 7.8 |
Average pit depth (μm) | 5.6 ± 1.1 | 6.3 ± 1.3 | 7.1 ± 0.9 |
Table 3 Pit depths of X80 pipeline steel coupons incubated in the presence of different bacteria for 14 days
Pit depth | P. aeruginosa broth | A. aceti broth | D. vulgaris broth |
---|---|---|---|
Largest pit depth (μm) | 6.9 | 7.4 | 7.8 |
Average pit depth (μm) | 5.6 ± 1.1 | 6.3 ± 1.3 | 7.1 ± 0.9 |
Fig. 4 Potentiodynamic polarization curves of X80 pipeline steel coupons in the presence of different bacteria for 1, 4, 7, 10 and 14 days: aP. aeruginosa, bA. aceti, cD. vulgaris
Bacteria | Time (day) | EOCP (V) versus SCE | RP (kΩ cm-2) | βa (V dec-1) | βc (V dec-1) | B (mV) | B′ (mV) | icorr (μA cm-2) |
---|---|---|---|---|---|---|---|---|
P. aeruginosa | 1 | - 0.68 ± 0.01 | 54.64 ± 4.50 | 0.21 ± 0.01 | - 0.13 ± 0.01 | 35.11 ± 1.12 | 35.60 ± 0.55 | 0.64 ± 0.02 |
4 | - 0.69 ± 0.04 | 54.35 ± 9.65 | 0.24 ± 0.04 | - 0.13 ± 0.03 | 36.18 ± 4.71 | 0.67 ± 0.09 | ||
7 | - 0.66 ± 0.02 | 61.20 ± 13.08 | 0.26 ± 0.05 | - 0.12 ± 0.01 | 35.45 ± 2.34 | 0.58 ± 0.04 | ||
10 | - 0.64 ± 0.03 | 66.44 ± 12.58 | 0.22 ± 0.02 | - 0.13 ± 0.02 | 34.71 ± 1.55 | 0.52 ± 0.02 | ||
14 | - 0.67 ± 0.01 | 69.66 ± 8.54 | 0.27 ± 0.01 | - 0.12 ± 0.01 | 36.33 ± 1.01 | 0.52 ± 0.01 | ||
A. aceti | 1 | - 0.64 ± 0.01 | 4.06 ± 1.51 | 0.12 ± 0.01 | - 0.20 ± 0.02 | 32.39 ± 1.45 | 33.00± 1.00 | 7.98 ± 0.36 |
4 | - 0.66 ± 0.01 | 14.66 ± 1.47 | 0.19 ± 0.02 | - 0.12 ± 0.05 | 32.39 ± 1.55 | 2.21 ± 0.11 | ||
7 | - 0.65 ± 0.02 | 14.84 ± 2.21 | 0.23 ± 0.02 | - 0.12 ± 0.01 | 33.21 ± 1.23 | 2.24 ± 0.08 | ||
10 | - 0.62 ± 0.05 | 18.27 ± 2.87 | 0.23 ± 0.01 | - 0.12 ± 0.02 | 34.31 ± 0.23 | 1.88 ± 0.01 | ||
14 | - 0.63 ± 0.01 | 15.02 ± 1.60 | 0.26 ± 0.01 | - 0.11 ± 0.01 | 33.63 ± 1.81 | 2.24 ± 0.12 | ||
D. vulgaris | 1 | - 0.60 ± 0.04 | 0.21 ± 0.08 | 0.27 ± 0.01 | - 0.27 ± 0.01 | 52.96 ± 1.36 | 58.60 ± 0.55 | 279.42 ± 6.23 |
4 | - 0.58 ± 0.02 | 0.16 ± 0.06 | 0.27 ± 0.01 | - 0.28 ± 0.01 | 59.22 ± 0.95 | 370.16 ± 5.88 | ||
7 | - 0.56 ± 0.01 | 0.14 ± 0.01 | 0.26 ± 0.02 | - 0.27 ± 0.02 | 58.18 ± 1.87 | 420.13 ± 13.33 | ||
10 | - 0.58 ± 0.01 | 0.18 ± 0.02 | 0.27 ± 0.01 | - 0.27 ± 0.02 | 58.27 ± 0.21 | 323.71 ± 1.31 | ||
14 | - 0.55 ± 0.01 | 0.16 ± 0.07 | 0.27 ± 0.02 | - 0.27 ± 0.01 | 58.68 ± 0.64 | 366.74 ± 3.78 |
Table 4 Corrosion parameters extracted from LPR and polarization curves of X80 pipeline steel in the presence of three bacteria for different times
Bacteria | Time (day) | EOCP (V) versus SCE | RP (kΩ cm-2) | βa (V dec-1) | βc (V dec-1) | B (mV) | B′ (mV) | icorr (μA cm-2) |
---|---|---|---|---|---|---|---|---|
P. aeruginosa | 1 | - 0.68 ± 0.01 | 54.64 ± 4.50 | 0.21 ± 0.01 | - 0.13 ± 0.01 | 35.11 ± 1.12 | 35.60 ± 0.55 | 0.64 ± 0.02 |
4 | - 0.69 ± 0.04 | 54.35 ± 9.65 | 0.24 ± 0.04 | - 0.13 ± 0.03 | 36.18 ± 4.71 | 0.67 ± 0.09 | ||
7 | - 0.66 ± 0.02 | 61.20 ± 13.08 | 0.26 ± 0.05 | - 0.12 ± 0.01 | 35.45 ± 2.34 | 0.58 ± 0.04 | ||
10 | - 0.64 ± 0.03 | 66.44 ± 12.58 | 0.22 ± 0.02 | - 0.13 ± 0.02 | 34.71 ± 1.55 | 0.52 ± 0.02 | ||
14 | - 0.67 ± 0.01 | 69.66 ± 8.54 | 0.27 ± 0.01 | - 0.12 ± 0.01 | 36.33 ± 1.01 | 0.52 ± 0.01 | ||
A. aceti | 1 | - 0.64 ± 0.01 | 4.06 ± 1.51 | 0.12 ± 0.01 | - 0.20 ± 0.02 | 32.39 ± 1.45 | 33.00± 1.00 | 7.98 ± 0.36 |
4 | - 0.66 ± 0.01 | 14.66 ± 1.47 | 0.19 ± 0.02 | - 0.12 ± 0.05 | 32.39 ± 1.55 | 2.21 ± 0.11 | ||
7 | - 0.65 ± 0.02 | 14.84 ± 2.21 | 0.23 ± 0.02 | - 0.12 ± 0.01 | 33.21 ± 1.23 | 2.24 ± 0.08 | ||
10 | - 0.62 ± 0.05 | 18.27 ± 2.87 | 0.23 ± 0.01 | - 0.12 ± 0.02 | 34.31 ± 0.23 | 1.88 ± 0.01 | ||
14 | - 0.63 ± 0.01 | 15.02 ± 1.60 | 0.26 ± 0.01 | - 0.11 ± 0.01 | 33.63 ± 1.81 | 2.24 ± 0.12 | ||
D. vulgaris | 1 | - 0.60 ± 0.04 | 0.21 ± 0.08 | 0.27 ± 0.01 | - 0.27 ± 0.01 | 52.96 ± 1.36 | 58.60 ± 0.55 | 279.42 ± 6.23 |
4 | - 0.58 ± 0.02 | 0.16 ± 0.06 | 0.27 ± 0.01 | - 0.28 ± 0.01 | 59.22 ± 0.95 | 370.16 ± 5.88 | ||
7 | - 0.56 ± 0.01 | 0.14 ± 0.01 | 0.26 ± 0.02 | - 0.27 ± 0.02 | 58.18 ± 1.87 | 420.13 ± 13.33 | ||
10 | - 0.58 ± 0.01 | 0.18 ± 0.02 | 0.27 ± 0.01 | - 0.27 ± 0.02 | 58.27 ± 0.21 | 323.71 ± 1.31 | ||
14 | - 0.55 ± 0.01 | 0.16 ± 0.07 | 0.27 ± 0.02 | - 0.27 ± 0.01 | 58.68 ± 0.64 | 366.74 ± 3.78 |
Bacteria | Time (day) | Weight loss (mg cm-2) | VC (μm year-1) | icorr (μA cm-2) |
---|---|---|---|---|
P. aeruginosa | 7 | 0.28 ± 0.02 | 18.60 ± 1.33 | 1.78 ± 0.10 |
14 | 0.45 ± 0.02 | 14.95 ± 0.07 | 1.43 ± 0.07 | |
A. aceti | 7 | 0.47 ± 0.04 | 31.22 ± 2.78 | 2.99 ± 0.22 |
14 | 0.74 ± 0.03 | 24.58 ± 1.21 | 2.35 ± 0.10 | |
D. vulgaris | 7 | 1.63 ± 0.16 | 108.28 ± 13.18 | 10.37 ± 0.75 |
14 | 2.88 ± 0.10 | 95.68 ± 4.23 | 9.16 ± 0.33 |
Table 5 Weight loss of X80 pipeline steel incubating with three bacteria for 7 days and 14 days, respectively
Bacteria | Time (day) | Weight loss (mg cm-2) | VC (μm year-1) | icorr (μA cm-2) |
---|---|---|---|---|
P. aeruginosa | 7 | 0.28 ± 0.02 | 18.60 ± 1.33 | 1.78 ± 0.10 |
14 | 0.45 ± 0.02 | 14.95 ± 0.07 | 1.43 ± 0.07 | |
A. aceti | 7 | 0.47 ± 0.04 | 31.22 ± 2.78 | 2.99 ± 0.22 |
14 | 0.74 ± 0.03 | 24.58 ± 1.21 | 2.35 ± 0.10 | |
D. vulgaris | 7 | 1.63 ± 0.16 | 108.28 ± 13.18 | 10.37 ± 0.75 |
14 | 2.88 ± 0.10 | 95.68 ± 4.23 | 9.16 ± 0.33 |
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