Effect of ZnO as corrosion product on corrosion behavior of zinc-iron corrosion protection systems

Feng, Yixuan; Wang, Lida; Yang, Zhengqing; Ma, Qian; He, Dandan; Xu, Kaixin; Zhang, Han; Zhang, Piji; Sun, Wen; Liu, Guichang

doi:10.1016/j.corsci.2023.111802

Cited by 6 publications

(1 citation statement)

References 24 publications

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“…The first part is the simulation experiment toward pitting corrosion using the self-designed occluded cell in Figure 1. Figure 1 shows the cell used in this simulation experiment, and the details of the cell are referred to in our previous work [21]. The processing size of the anode sample used for the corrosion test in the simulated block area is 10 mm × 50 mm × 5 mm, and the surface is polished with 1000# abrasive paper step by step until it is smooth.…”

Section: Simulated Occluded Cell For Corrosion Experimentsmentioning

confidence: 99%

Inhibition Localized Corrosion of N80 Petroleum Pipeline Steel in NaCl-Na2S Solution Using an Imidazoline Quaternary Ammonium Salt

Li,

Du,

Cui

et al. 2024

Processes

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In this paper, the local corrosion inhibition effect of imidazoline on N80 oil pipeline steel in a NaCl-Na2S solution was studied by the simulated blocking tank cell method, and the corrosion processes of the cathode and anode in the blocking zone were simulated. The blocking corrosion behavior of the pipeline tubing steel N80 in simulated corrosion solutions without and with different concentrations of an imidazoline corrosion inhibitor was studied by chemical analysis and electrochemical analysis. The results show that in the three solution systems, after the anode polarization of the occluded cell, the solution in the occluded region is acidified, the pH value decreases sharply, the migration of Cl− and S2− increases, and the concentration is increased in the blocked area. After adding the imidazoline corrosion inhibitor, the imidazoline inhibitor can reduce the migration of small-radius anions (Cl− and S2−) to the occluded area, inhibit the acidification of the solution in the occluded area, and prevent the dissolution of metals in the occluded area. As a result, the corrosion of the occluded area is slowed down due to the change in the chemical and electrochemical state of the occluded area. In the three corrosion solution systems of 2% Na2S + 5% NaCl, 2% Na2S + 8% NaCl, and 2% Na2S + 10% NaCl, the imidazoline corrosion inhibitor can form an adsorption film on the metal surface, thereby increasing the polarization resistance and decreasing the corrosion rate. The addition of an imidazoline corrosion inhibitor can significantly increase the kinetic constant of anode polarization, which can effectively inhibit the local corrosion of N80 steel in these corrosion systems.

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Section: Simulated Occluded Cell For Corrosion Experimentsmentioning

confidence: 99%