Journal
CORROSION SCIENCE
Volume 128, Issue -, Pages 1-8Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2017.08.033
Keywords
Steel; Phosphate coating; Graphene oxide; Corrosion resistance
Funding
- Science and Technology Planning Project of Guangdong Province, China [2015A010105008]
- Science and Technology Planning Project of Guangzhou Science Technology & Innovation Commission [201607010049]
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Graphene oxide (GO) is used to accelerate zinc phosphating process on steel. The effect of GO on microstructure and corrosion resistance of phosphate coating is investigated. Experiments show that GO sheets can act as sedimentary beds at the initial stage of phosphating process, which can capture metal ions and thus favor the nucleation of phosphate crystals. When the concentration of GO is optimized to be 1.2 g/L, the phosphate coating possesses the most uniform and compact structure and achieves the strongest corrosion resistance. Results demonstrate that GO can effectively accelerate phosphating process and enhance corrosion resistance of phosphate coating.
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