Acta Metallurgica Sinica (English Letters) ›› 2019, Vol. 32 ›› Issue (11): 1421-1436.DOI: 10.1007/s40195-019-00904-4
Special Issue: 2019年腐蚀专辑-2
• Orginal Article • Previous Articles
Chao Han1,2, Ying-Hua Wei1,2(), Hai-Feng Zhang1,2, Zheng-Wang Zhu1,2, Jing Li1,2
Received:
2018-07-25
Revised:
2018-11-09
Online:
2019-11-10
Published:
2019-11-10
Chao Han, Ying-Hua Wei, Hai-Feng Zhang, Zheng-Wang Zhu, Jing Li. Corrosion Resistance and Electrochemical Behaviour of Amorphous Ni84.9Cr7.4Si4.2Fe3.5 Alloy in Alkaline and Acidic Solutions[J]. Acta Metallurgica Sinica (English Letters), 2019, 32(11): 1421-1436.
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Ni | Cr | Si | Fe | |
---|---|---|---|---|
ICP-MS | 84.9 | 7.4 | 4.2 | 3.5 |
AAS | 86.0 | 6.6 | 4.1 | 3.3 |
Table 1 Composition of the sample examined via ICP-MS and AAS
Ni | Cr | Si | Fe | |
---|---|---|---|---|
ICP-MS | 84.9 | 7.4 | 4.2 | 3.5 |
AAS | 86.0 | 6.6 | 4.1 | 3.3 |
Fig. 5 Potentiodynamic polarization curves for 304 stainless steel, 316 stainless steel, amorphous Ni84.9Cr7.4Si4.2Fe3.5 alloy, and its annealed sample at a pH=13, b pH=12, c pH=11, d pH=7, e pH=3, f pH=1
pH value | Measured parameter | Amorphous Ni84.9Cr7.4Si4.2Fe3.5 alloy | Ni84.9Cr7.4Si4.2Fe3.5 alloy annealed at 973 K | 304 SS | 316 SS |
---|---|---|---|---|---|
13 | Ecorr (mV vs. SCE) | -193 | -279 | -506 | -477 |
Icorr (μA/cm2) | 0.020 | 0.173 | 0.202 | 0.077 | |
vcorr (mm/y) | 0.000213 | 0.001843 | 0.002995 | 0.000925 | |
12 | Ecorr (mV vs. SCE) | -163 | -232 | -394 | -405 |
Icorr (μA/cm2) | 0.016 | 0.200 | 0.265 | 0.091 | |
vcorr (mm/y) | 0.000175 | 0.002131 | 0.003179 | 0.001088 | |
11 | Ecorr (mV vs. SCE) | -131 | -192 | -409 | -369 |
Icorr (μA/cm2) | 0.017 | 0.092 | 0.145 | 0.090 | |
vcorr (mm/y) | 0.000181 | 0.000985 | 0.001548 | 0.001081 | |
7 | Ecorr (mV vs. SCE) | -44 | -188 | -443 | -419 |
Icorr (μA/cm2) | 0.016 | 0.338 | 0.063 | 0.034 | |
vcorr (mm/y) | 0.000169 | 0.003596 | 0.000758 | 0.000406 | |
3 | Ecorr (mV vs. SCE) | -109 | -218 | -416 | -342 |
Icorr (μA/cm2) | 0.247 | 14.438 | 0.132 | 0.101 | |
vcorr (mm/y) | 0.002639 | 0.153790 | 0.001583 | 0.001210 | |
1 | Ecorr (mV vs. SCE) | -160 | -197 | -309 | -374 |
Icorr (μA/cm2) | 0.927 | 18.393 | 7.238 | 9.932 | |
vcorr (mm/y) | 0.009872 | 0.195920 | 0.086861 | 0.119190 |
Table 2 Results of potentiodynamic polarization tests performed on the Ni84.9Cr7.4Si4.2Fe3.5 alloy and stainless steel samples
pH value | Measured parameter | Amorphous Ni84.9Cr7.4Si4.2Fe3.5 alloy | Ni84.9Cr7.4Si4.2Fe3.5 alloy annealed at 973 K | 304 SS | 316 SS |
---|---|---|---|---|---|
13 | Ecorr (mV vs. SCE) | -193 | -279 | -506 | -477 |
Icorr (μA/cm2) | 0.020 | 0.173 | 0.202 | 0.077 | |
vcorr (mm/y) | 0.000213 | 0.001843 | 0.002995 | 0.000925 | |
12 | Ecorr (mV vs. SCE) | -163 | -232 | -394 | -405 |
Icorr (μA/cm2) | 0.016 | 0.200 | 0.265 | 0.091 | |
vcorr (mm/y) | 0.000175 | 0.002131 | 0.003179 | 0.001088 | |
11 | Ecorr (mV vs. SCE) | -131 | -192 | -409 | -369 |
Icorr (μA/cm2) | 0.017 | 0.092 | 0.145 | 0.090 | |
vcorr (mm/y) | 0.000181 | 0.000985 | 0.001548 | 0.001081 | |
7 | Ecorr (mV vs. SCE) | -44 | -188 | -443 | -419 |
Icorr (μA/cm2) | 0.016 | 0.338 | 0.063 | 0.034 | |
vcorr (mm/y) | 0.000169 | 0.003596 | 0.000758 | 0.000406 | |
3 | Ecorr (mV vs. SCE) | -109 | -218 | -416 | -342 |
Icorr (μA/cm2) | 0.247 | 14.438 | 0.132 | 0.101 | |
vcorr (mm/y) | 0.002639 | 0.153790 | 0.001583 | 0.001210 | |
1 | Ecorr (mV vs. SCE) | -160 | -197 | -309 | -374 |
Icorr (μA/cm2) | 0.927 | 18.393 | 7.238 | 9.932 | |
vcorr (mm/y) | 0.009872 | 0.195920 | 0.086861 | 0.119190 |
Fig. 6 Nyquist plots of 304 SS, 316 SS, amorphous alloy, and its annealed sample in soak solutions and corresponding fitted results of EIS data at a pH=13, b pH=12, c pH=11, d pH=7, e pH=3, f pH=1
Fig. 7 Bode impedance magnitude plots of 304 SS, 316 SS, amorphous alloy, and its annealed sample in soak solutions and corresponding fitted results of EIS data at a pH=13, b pH=12, c pH=11, d pH=7, e pH=3, f pH=1
Fig. 8 Bode phase angle plots of 304 SS, 316 SS, amorphous alloy, and its annealed sample in soak solutions and corresponding fitted results of EIS data at a pH=13, b pH=12, c pH=11, d pH=7, e pH=3, f pH=1
pH value of the soak solution | Rs (Ω cm2) | R(x1) (Ω cm2) | R(x2) (Ω cm2) | Q(x1) (μΩ-1 cm-2 sn) | Q(x2) (μΩ-1 cm-2 sn) | n ( x1) | n ( x2) |
---|---|---|---|---|---|---|---|
13 | 10.60 | 2.32×1015 | 3.35×1015 | 15.79 | 3.78 | 1.000 | 0.917 |
12 | 8.43 | 3.46×1015 | 4.63×1013 | 6.92 | 1.54 | 0.814 | 0.978 |
11 | 7.75 | 2.77×1013 | 1.40×107 | 3.13 | 4.40 | 0.948 | 0.549 |
7 | 14.63 | 9.67×1012 | 1.12×106 | 4.28 | 1.49 | 0.938 | 0.921 |
Table 3 Fitted values of the amorphous alloy
pH value of the soak solution | Rs (Ω cm2) | R(x1) (Ω cm2) | R(x2) (Ω cm2) | Q(x1) (μΩ-1 cm-2 sn) | Q(x2) (μΩ-1 cm-2 sn) | n ( x1) | n ( x2) |
---|---|---|---|---|---|---|---|
13 | 10.60 | 2.32×1015 | 3.35×1015 | 15.79 | 3.78 | 1.000 | 0.917 |
12 | 8.43 | 3.46×1015 | 4.63×1013 | 6.92 | 1.54 | 0.814 | 0.978 |
11 | 7.75 | 2.77×1013 | 1.40×107 | 3.13 | 4.40 | 0.948 | 0.549 |
7 | 14.63 | 9.67×1012 | 1.12×106 | 4.28 | 1.49 | 0.938 | 0.921 |
pH value of the soak solution | Rs (Ω cm2) | Rpore (Ω cm2) | Rct (Ω cm2) | Qfilm (μΩ-1 cm-2 sn) | Qdl (μΩ-1 cm-2 sn) | n film | n dl |
---|---|---|---|---|---|---|---|
13 | 5.81 | 8.49×104 | 1.42×104 | 8.00 | 254.00 | 0.944 | 1 |
12 | 5.15 | 2.68×104 | 2.49×104 | 6.68 | 74.06 | 0.921 | 0.743 |
11 | 5.76 | 2.95×104 | 4.93×104 | 10.09 | 47.66 | 0.940 | 0.599 |
7 | 5.55 | 8.79×104 | 4.62×104 | 9.89 | 94.34 | 0.935 | 0.838 |
Table 4 Fitted values of the crystalline counterpart
pH value of the soak solution | Rs (Ω cm2) | Rpore (Ω cm2) | Rct (Ω cm2) | Qfilm (μΩ-1 cm-2 sn) | Qdl (μΩ-1 cm-2 sn) | n film | n dl |
---|---|---|---|---|---|---|---|
13 | 5.81 | 8.49×104 | 1.42×104 | 8.00 | 254.00 | 0.944 | 1 |
12 | 5.15 | 2.68×104 | 2.49×104 | 6.68 | 74.06 | 0.921 | 0.743 |
11 | 5.76 | 2.95×104 | 4.93×104 | 10.09 | 47.66 | 0.940 | 0.599 |
7 | 5.55 | 8.79×104 | 4.62×104 | 9.89 | 94.34 | 0.935 | 0.838 |
Fig. 14 SEM images of the amorphous alloy and its annealed sample after potentiostatic polarization tests at 400 mV for 3600 s. a Amorphous alloy in 0.1 M NaOH; b annealed sample in 0.1 M NaOH; c amorphous alloy in 0.1 M HCl; d annealed sample in 0.1 M HCl
Amorphous alloy | Annealed sample | |
---|---|---|
Solution system | 0.1 M HCl | |
SI (nA) | 0.19422 | 0.3784 |
IRMS (nA) | 0.19427 | 0.3785 |
LI | 1 | 1 |
Table 5 Values of SI, IRMS, and LI after the potentiostatic tests of the amorphous Ni84.9Cr7.4Si4.2Fe3.5 alloy and its annealed sample in 0.1 M HCl at 400 mV for 3600 s
Amorphous alloy | Annealed sample | |
---|---|---|
Solution system | 0.1 M HCl | |
SI (nA) | 0.19422 | 0.3784 |
IRMS (nA) | 0.19427 | 0.3785 |
LI | 1 | 1 |
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