|Superiority of Graphene over Polymer Coatings for Prevention of Microbially Induced Corrosion|
|Krishnamurthy, Ajay; Gadhamshetty, Venkataramana; Mukherjee, Rahul; Natarajan, Bharath; Eksik, Osman; Shojaee, S. Ali; Lucca, Don A.; Ren, Wencai; Cheng, Hui-Ming; Koratkar, Nikhil; Venkata.Gadhamshetty@sdsmt.edu; firstname.lastname@example.org
|摘要||Prevention of microbially induced corrosion (MIC) is of great significance in many environmental applications. Here, we report the use of an ultra-thin, graphene skin (Gr) as a superior anti-MIC coating over two commercial polymeric coatings, Parylene-C (PA) and Polyurethane (PU). We find that Nickel (Ni) dissolution in a corrosion cell with Gr-coated Ni is an order of magnitude lower than that of PA and PU coated electrodes. Electrochemical analysis reveals that the Gr coating offers similar to 10 and similar to 100 fold improvement in MIC resistance over PU and PA coatings respectively. This finding is remarkable considering that the Gr coating (1-2 nm) is similar to 25 and similar to 4000 times thinner than the PA (40-50 nm), and PU coatings (20-80 mu m), respectively. Conventional polymer coatings are either non-conformal when deposited or degrade under the action of microbial processes, while the electro-chemically inert graphene coating is both resistant to microbial attack and is extremely conformal and defect-free. Finally, we provide a brief discussion regarding the effectiveness of as-grown vs. transferred graphene films for anti-MIC applications. While the as-grown graphene films are devoid of major defects, wet transfer of graphene is shown to introduce large scale defects that make it less suitable for the current application.|
; mukherjee, rahul
; eksik, osman
; koratkar, nikhil] rensselaer polytech inst, mech aerosp & nucl engn, troy, ny 12180 usa
; [gadhamshetty, venkataramana] south dakota sch mines & technol, civil & environm engn, rapid city, sd 57701 usa
; [natarajan, bharath
; koratkar, nikhil] rensselaer polytech inst, dept mat sci & engn, troy, ny 12180 usa
; [shojaee, s. ali
; lucca, don a.] oklahoma state univ, mech & aerosp engn, stillwater, ok 74078 usa
; [ren, wencai
; cheng, hui-ming] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china
|资助者||USA National Science Foundation [CMMI 1234641, CMMI 1435783, 1454102]; National Science Foundation of China [50921004, 50872136, 50972147]; Chinese Academy of Sciences [KJCX2-YW-231]; NASA [NNX13AB25A]; Electric Power Research Institute
Krishnamurthy, Ajay,Gadhamshetty, Venkataramana,Mukherjee, Rahul,et al. Superiority of Graphene over Polymer Coatings for Prevention of Microbially Induced Corrosion[J]. SCIENTIFIC REPORTS,2015,5:-.
Krishnamurthy, Ajay.,Gadhamshetty, Venkataramana.,Mukherjee, Rahul.,Natarajan, Bharath.,Eksik, Osman.,...&email@example.com.(2015).Superiority of Graphene over Polymer Coatings for Prevention of Microbially Induced Corrosion.SCIENTIFIC REPORTS,5,-.
Krishnamurthy, Ajay,et al."Superiority of Graphene over Polymer Coatings for Prevention of Microbially Induced Corrosion".SCIENTIFIC REPORTS 5(2015):-.