Application of cathodic protection method on steel structures using sacrificial anode and sodium polyacrylate-sodium carboxymethyl cellulose (PANa–CMC) hydrogel electrolyte

Autor: Jie Xu, Muye Yang, Shengyue Li, Shigenobu Kainuma, Bohai Ji, Shinichi Murayama
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Case Studies in Construction Materials, Vol 20, Iss , Pp e02742- (2024)
Druh dokumentu: article
ISSN: 2214-5095
DOI: 10.1016/j.cscm.2023.e02742
Popis: An ionically conductive sodium polyacrylate-sodium carboxymethyl cellulose (PANa–CMC) hydrogel electrolyte was developed for the sacrificial anode cathodic protection (SACP) of carbon steel in high-humidity environments. The incorporation of varying ratios of CMC into hydrogel formulation enhanced the water retention capacity, adhesion strength, and electrochemical performance, making it suitable for SACP applications. Particularly, PANa-5% CMC hydrogels demonstrated a current density of approximately 3 μA/cm², inhibited passive corrosion product formation, and sequestered metal ions from anodes, thus minimizing contamination. These findings highlight the substantial potential of PANa–CMC hydrogels as electrolytes, expanding the application of the SACP method to atmospheric environments.
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