Effect of 2-mercaptobenzothiazole concentration on sour-corrosion behavior of API X60 pipeline steel: Electrochemical parameters and adsorption mechanism
Masoud Sabzi , Amir Hayati Jozani , Farzad Zeidvandi , Majid Sadeghi , Saeid Mersagh Dezfuli
International Journal of Minerals, Metallurgy, and Materials ›› 2022, Vol. 29 ›› Issue (2) : 271 -282.
Effect of 2-mercaptobenzothiazole concentration on sour-corrosion behavior of API X60 pipeline steel: Electrochemical parameters and adsorption mechanism
We investigated the effect of the 2-mercaptobenzothiazole concentration on the sour-corrosion behavior of API X60 pipeline steel in an environment containing H2S at 25°C and in the presence of 0, 2.5, 5.0, 7.5, and 10.0 g/L of 2-mercaptobenzothiazole inhibitor. To examine this behavior, we conducted open-circuit potential (OCP), potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) tests. Energy dispersive spectroscopy and scanning electron microscopy were also used to analyze the corrosion products. The results of the OCP and potentiodynamic polarization tests revealed that 2-mercaptobenzothiazole reduces the speed of both the anodic and cathodic reactions. An assessment of the Gibbs free energy of the inhibitor (ΔGads ⊖) indicated that its value was less than −20 kJ·mol−1 and greater than −40 kJ·mol−1. Therefore, the adsorption of 2-mercaptobenzothiazole onto the surface of the API X60 pipeline steel occurs both physically and chemically, the latter of which is particularly intentional. In addition, as the ΔGads ⊖ value was negative, we could conclude that the adsorption of 2-mercaptobenzothiazole onto the surface of the pipeline steel occurs spontaneously. The EIS results indicate that with the increase in the 2-mercaptobenzothiazole inhibitor concentration, the corrosion resistance of API X60 steel increases. An analysis of the corrosion products revealed that iron sulfide compounds form on the surface. In summary, the results showed that an increase in the inhibitor concentration results in a decrease in the corrosion rate and an increase in inhibitory efficiency. Additionally, we found that the 2-mercaptobenzothiazole adsorption process on the API X60 steel surfaces in an H2S-containing environment follows the Langmuir adsorption isotherm and occurs spontaneously.
API X60 steel / sour corrosion / 2-mercaptobenzothiazole / inhibitor concentration / electrochemical parameters / environments containing hydrogen sulfide
| [1] |
Q. Sun, C.F. Chen, X. Zhao, H. Chi, Y. He, Y.C. Li, Y.M. Qi, and H.B. Yu, Ion-selectivity of iron sulfides and their effect on H2S corrosion, Corros. Sci., 158(2019), art. No. 108085. |
| [2] |
M.D.D. Ayagou, G.R. Joshi, T.T.M. Tran, B. Tribollet, E. Sutter, C. Mendibide, C. Duret-Thual, and J. Kittel, Impact of oxygen contamination on the electrochemical impedance spectroscopy of iron corrosion in H2S solutions, Corros. Sci., 164(2020), art. No. 108302. |
| [3] |
|
| [4] |
|
| [5] |
|
| [6] |
|
| [7] |
|
| [8] |
|
| [9] |
|
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
|
| [14] |
|
| [15] |
|
| [16] |
|
| [17] |
|
| [18] |
|
| [19] |
|
| [20] |
|
| [21] |
S.H.M. Anijdan, M. Sabzi, M.R. Zadeh, and M. Farzam, The effect of electroless bath parameters and heat treatment on the properties of Ni-P and Ni-P-Cu composite coatings, Mater. Res., 21(2018), No. 2, art. No. e20170973. |
| [22] |
|
| [23] |
|
| [24] |
|
| [25] |
|
| [26] |
|
| [27] |
|
| [28] |
S.M. Dezfuli and M. Sabzi, Deposition of self-healing thin films by the sol—gel method: A review of layer-deposition mechanisms and activation of self-healing mechanisms, Appl. Phys. A, 125(2019), No. 8, art. No. 557. |
| [29] |
|
| [30] |
|
| [31] |
|
| [32] |
S.H.M. Anijdan and M. Sabzi, The evolution of microstructure of an high Ni HSLA X100 forged steel slab by thermomechanical controlled processing, [in] The TMS 2018 Annual Meeting & Exhibition, Phoenix, 2018, p. 145. |
| [33] |
|
| [34] |
|
| [35] |
|
| [36] |
|
| [37] |
|
| [38] |
|
| [39] |
|
| [40] |
|
| [41] |
|
| [42] |
|
| [43] |
|
| [44] |
|
| [45] |
|
| [46] |
M. Sabzi, S.M. Dezfuli, M. Asadian, A. Tafi, and A. Mahaab, Study of the effect of temperature on corrosion behavior of galvanized steel in seawater environment by using potentiodynamic polarization and EIS methods, Mater. Res. Express, 6(2019), No. 7, art. No. 076508. |
| [47] |
|
| [48] |
|
| [49] |
|
| [50] |
|
| [51] |
|
| [52] |
|
| [53] |
|
| [54] |
|
| [55] |
|
| [56] |
|
| [57] |
|
| [58] |
|
| [59] |
|
| [60] |
|
| [61] |
|
| [62] |
|
| [63] |
S.S. Shivakumar and K.N. Mohana, Corrosion behavior and adsorption thermodynamics of some Schiff bases on mild steel corrosion in industrial water medium, Int. J. Corros., 2013(2013), art. No. 543204. |
| [64] |
|
| [65] |
|
| [66] |
|
| [67] |
|
| [68] |
|
| [69] |
|
| [70] |
|
| [71] |
|
| [72] |
|
| [73] |
|
| [74] |
|
| [75] |
|
| [76] |
|
| [77] |
|
| [78] |
|
| [79] |
|
| [80] |
|
| [81] |
|
| [82] |
|
| [83] |
|
| [84] |
|
| [85] |
|
| [86] |
M. Sabzi and M. Farzam, Hadfield manganese austenitic steel: A review of manufacturing processes and properties, Mater. Res. Express, 6(2019), No. 10, art. No. 1065c2. |
| [87] |
|
| [88] |
|
| [89] |
|
/
| 〈 |
|
〉 |