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Electrochemical and microstructural evaluation of acidification damage induced by impressed current cathodic protection after incorporating a hydroxy activated-Mg/Al-double oxide in the external anode mortar
Graphical abstract Display Omitted
Highlights A hydroxy-activated Mg/Al double oxide (HDMO) material was introduced to mitigate acidification damage to the anode mortar. Expected service life of external anode mortar for ICCP system in chloride contaminated environment could be enhanced via HDMO-incorporation. Impedance analyses indicated the significant role of HDMO to decline the oxidation process of anode mortar in the chloride environment. The mechanism of the HDMO effect was discussed.
Abstract Acidification damage in anode mortar is caused by anodic reactions occurring during impressed current cathodic protection (ICCP) and significantly affects the lifetimes of external anodes. Hydroxy-activated Mg/Al double oxide (HDMO) material was introduced to mitigate acidification damage by stabilizing the hydroxide content around the external anode mortar. The modified external anode was evaluated by electrochemical and microstructure techniques. The results indicated that HDMO slowed the oxidation of the external anode and increased the Ca(OH)2 content in the external anode chemistry. Therefore, HDMO can potentially be utilized for the design of external anode mortar for the ICCP process.
Electrochemical and microstructural evaluation of acidification damage induced by impressed current cathodic protection after incorporating a hydroxy activated-Mg/Al-double oxide in the external anode mortar
Graphical abstract Display Omitted
Highlights A hydroxy-activated Mg/Al double oxide (HDMO) material was introduced to mitigate acidification damage to the anode mortar. Expected service life of external anode mortar for ICCP system in chloride contaminated environment could be enhanced via HDMO-incorporation. Impedance analyses indicated the significant role of HDMO to decline the oxidation process of anode mortar in the chloride environment. The mechanism of the HDMO effect was discussed.
Abstract Acidification damage in anode mortar is caused by anodic reactions occurring during impressed current cathodic protection (ICCP) and significantly affects the lifetimes of external anodes. Hydroxy-activated Mg/Al double oxide (HDMO) material was introduced to mitigate acidification damage by stabilizing the hydroxide content around the external anode mortar. The modified external anode was evaluated by electrochemical and microstructure techniques. The results indicated that HDMO slowed the oxidation of the external anode and increased the Ca(OH)2 content in the external anode chemistry. Therefore, HDMO can potentially be utilized for the design of external anode mortar for the ICCP process.
Electrochemical and microstructural evaluation of acidification damage induced by impressed current cathodic protection after incorporating a hydroxy activated-Mg/Al-double oxide in the external anode mortar
Zhu, Ji-Hua (author) / Wu, Xian-Yang (author) / Mohamed, Ibrahim M.A. (author) / Xing, Feng (author)
2021-09-28
Article (Journal)
Electronic Resource
English
| British Library Conference Proceedings | 2019
Anode for Impressed Current Cathodic Protection of Reinforced Concrete
| European Patent Office | 2016