A waterborne zinc-rich epoxy anti-corrosion coating with electron transport pathways constructed by conductive potassium titanate whiskers

A green strategy is proposed for long-term anti-corrosion of metals using a durable waterborne Sb-SnO2@PTW/WZEP (SS@PTW/WZEP) composite coating with continuous electronic transmission pathways. The resulting coating exhibited stable open circuit potential (OCP) values below −0.9 V after 90 days of e...

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Bibliographic Details
Published in:Corrosion science 2024-08, Vol.236, p.112250, Article 112250
Main Authors: Lin, Dan, Wang, Ruitao, Gao, Shangdong, Shao, Zexi, Shi, Yan, Pei, Luchao, Peng, Jianwen, Bao, Di, Zhu, Yanji, Wang, Huaiyuan
Format: Article
Language:English
Subjects:
Anticorrosion
Cathodic protection
Conductive SS@PTW whisker
Electron transport pathways
Zinc-rich epoxy coating
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Summary:A green strategy is proposed for long-term anti-corrosion of metals using a durable waterborne Sb-SnO2@PTW/WZEP (SS@PTW/WZEP) composite coating with continuous electronic transmission pathways. The resulting coating exhibited stable open circuit potential (OCP) values below −0.9 V after 90 days of exposure to 3.5 wt% NaCl solution. Moreover, there were no obvious corrosion products on the SS@PTW-3/WZEP composite coating after being placed in the salt spray chamber for 4392 h, with a cumulative salt spray time of 1800 h. This research provides important inspiration for the design of waterborne zinc-rich epoxy coatings in heavy anti-corrosion applications. •SS@PTW/WZEP anti-corrosion coating was successfully fabricated.•Electron transport pathways were constructed by SS@PTW whiskers within SS@PTW/WZEP coating.•The SS@PTW/WZEP coatings exhibited stable OCP values and superior salt spray resistance.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2024.112250