Journal
MATERIALS LETTERS
Volume 240, Issue -, Pages 262-266Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2019.01.009
Keywords
Graphene; Functionalization; Composite materials; Corrosion; LEIS
Funding
- General Financial Grant from the China Postdoctoral Science Foundation [2017M610177, 2018T011222]
- National Natural Science Foundation of China [21703026, 51671047]
- Opening Project of Material Corrosion and Protection Key Laboratory of Sichuan Province [2017CL16]
- Fundamental Research Funds for the Central Universities [DUT16RC(3)106]
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Graphene functionalization helps to improve the barrier property of graphene-reinforced coatings, however, it may also increase the electrical conductivity of coatings and result in galvanic corrosion between coating and metal. To demonstrate that fine-tuned functionalization of graphene is vital for its applications in metal protection, reduced graphene oxide (rGO) with various functionalization degree was precisely prepared. Compared with pristine rGO, rGO with a low functionalization degree possesses an enhanced corrosion promotion activity (CPA), and rGO with a high functionalization degree exhibits an inhibited CPA. Critical functionalization degree for inhibiting the CPA of rGO/epoxy nanocomposite coatings was determined. (C) 2019 Elsevier B.V. All rights reserved.
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