Abstract
Among the different existing techniques, the surface coating on steel provides an economical means to address the corrosion issue. In this study, a geopolymer anti-corrosion coating modified with in-situ reduced graphene oxide (RGO) was developed, and its physicochemical and electrochemical properties were investigated. Four different graphene oxide (GO) contents (i.e., 0.05%, 0.1%, 0.5% and 1% of the binder by weight) were studied. The GO content in the coating was optimized based on its corrosion protection ability, and the performance of GO modified geopolymer coated steel was compared to that of bare steel, cement coated steel and blank geopolymer coated steel when immersed in a 3.5% NaCl solution. It was observed that using a GO content of 0.1% can increase the corrosion resistance of geopolymer-coated steel by more than two orders of magnitude compared to bare carbon steel. Additionally, the physiochemical properties of different coatings were investigated, and the corrosion protection mechanism with RGO modification has been further elaborated. © 2022 Elsevier Ltd.
| Original language | English |
|---|---|
| Article number | 127942 |
| Journal | Construction and Building Materials |
| Volume | 342 |
| Issue number | Part B |
| Online published | 27 May 2022 |
| DOIs | |
| Publication status | Published - 1 Aug 2022 |
| Externally published | Yes |
Funding
The authors would like to acknowledge the funding support by The Chinese Guangdong Province R&D Plan for Key Areas (Project code: 2019B111107002), the Research Grants Council of the Hong Kong SAR (PolyU 152231/20E), the Chinese National Engineering Research Centre for Steel Construction (Hong Kong Branch) at the Hong Kong Polytechnic University (Project code: BBVA).
Research Keywords
- Coating
- Corrosion resistance
- Electrochemical measurements
- Geopolymer
- Reduced graphene oxide
- Steel
RGC Funding Information
- RGC-funded