Numerical simulation of galvanic corrosion and sacrificial anode protection of U-tube Material of kettle reboiler in N-Methyldiethanolamine solution

• Published in: International journal of electrochemical science Vol. 17; no. 9; p. 220969
• Main Authors: Gao, Qiuying, Zeng, Wenguang, Yang, Zuguo, Liu, Qiang, Sun, Haijiao, Wang, Jidong
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.2022
• Subjects: Galvanic corrosion; Numerical simulation; Reboiler; Sacrificial anode cathodic protection; Galvanic corrosion; Numerical simulation; Sacrificial anode cathodic protection; Reboiler
• ISSN: 1452-3981; 1452-3981
• DOI: 10.20964/2022.09.78

As a common heat exchanger in the field of petroleum industry, the structure of reboiler is extremely complex, in which U-tube bundle is the key part. The N-Methyldiethanolamine medium contains hydrogen sulfide, carbon dioxide and other acidic gases, which is highly corrosive. In addition, due to the contact with a variety of materials, there is the risk of galvanic corrosion. Firstly, the galvanic corrosion behavior of reboiler materials in solution was studied by numerical simulation, and it was found that the corrosion of U-tube bundle was serious. Then, the combined protection design of coating and sacrificial anode is used to protect the reboiler U-tube bundle from corrosion. The numerical simulation results show that the combined protection of coating and sacrificial anode has a good effect. This numerical simulation method also provides an effective idea and method for the corrosion research of super complex structures such as reboiler.