Synthesis of fluorine-modified polysilazanes via Si–H bond activation and their application as protective hydrophobic coatings

2017 ◽  
Vol 5 (48) ◽  
pp. 25509-25521 ◽  
Author(s):  
P. Furtat ◽  
M. Lenz-Leite ◽  
E. Ionescu ◽  
R. A. F. Machado ◽  
G. Motz
Keyword(s):  
Corrosion Protection ◽  
Chemical Stability ◽  
Bond Activation ◽  
New Method ◽  
Hydrophobic Coatings ◽  
Protection Of Metals

A new method to synthesize fluorine-modified polysilazanes for processing of hydrophobic coatings with remarkable chemical stability for corrosion protection of metals.

scholarly journals Review of Recent Developments in the Formulation of Graphene-Based Coatings for the Corrosion Protection of Metals and Alloys

2020 ◽  
Vol 1 (3) ◽  
pp. 296-327
Author(s):  
Bronach Healy ◽  
Tian Yu ◽  
Daniele da Silva Alves ◽  
Carmel B. Breslin
Keyword(s):  
Graphene Oxide ◽  
Corrosion Protection ◽  
Hexagonal Boron Nitride ◽  
Protective Coatings ◽  
Galvanic Corrosion ◽  
Metals And Alloys ◽  
Graphene Layers ◽  
Recent Developments ◽  
Double Hydroxides ◽  
Protection Of Metals

Corrosion is a naturally occurring phenomenon and there is continuous interest in the development of new and more protective coatings or films that can be employed to prevent or minimise corrosion. In this review the corrosion protection afforded by two-dimensional graphene is described and discussed. Following a short introduction to corrosion, the application of graphene in the formulation of coatings and films is introduced. Initially, reduced graphene oxide (rGO) and metallic like graphene layers are reviewed, highlighting the issues with galvanic corrosion. Then the more successful graphene oxide (GO), functionalised GO and polymer grafted GO-modified coatings are introduced, where the functionalisation and grafting are tailored to optimise dispersion of graphene fillers. This is followed by rGO coupled with zinc rich coatings or conducting polymers, GO combined with sol-gels, layered double hydroxides or metal organic frameworks as protective coatings, where again the dispersion of the graphene sheets becomes important in the design of protective coatings. The role of graphene in the photocathodic protection of metals and alloys is briefly introduced, while graphene-like emerging materials, such as hexagonal boron nitride, h-BN, and graphitic carbon nitride, g-C3N4, are then highlighted.

A review on corrosion protection with single-layer, multilayer, and composites of graphene

2018 ◽  
Vol 36 (2) ◽  
pp. 155-225 ◽  
Author(s):  
András Gergely
Keyword(s):  
Corrosion Protection ◽  
Composite Coatings ◽  
Single Layer ◽  
Comprehensive Overview ◽  
Environmental Friendliness ◽  
Thin Carbon ◽  
Graphene Derivatives ◽  
Research Findings ◽  
And Performance ◽  
Protection Of Metals

AbstractIn this review, most of the works are attempted to cover about corrosion protection of metals with molecular-tight atomic thin carbon layers of all sorts of graphene derivatives from the very beginning to the latest theoretical and experimental research findings, so as engineering achievements in the field up to date. Although high and tuneable electrical conductivity of graphene is the main feature exploited in majority of the applications such as catalysis, photocatalysis, electrocatalysis, low electrical but high chemical resistivity electrodes in batteries, and ultracapacitors, corrosion protection of metals favours the opposite – good physical separation and electrical insulation. Both of the latter ones lead to durable excellent protection, which can only be ensured by special design and implementation. Thus, the milestones of major hardships both on theoretical and practical sides are delineated similarly as utmost developments in circumventing all problems with an aim to ensure timely transfer from the research phase to successful industry utilisations. Relying on numerous works, this paper gives a comprehensive overview in the subjects of preparation, modification, and use of multiple sorts of graphene in the forms of neat, combined layers, and composite coatings on numerous metals. All performance parameters are given in detail. Chronological order of the article serves the purpose to give the reader a clear picture and an important clue on viability of strategies in the aspects of environmental friendliness, attainable maximum durability, and performance of corrosion protection with graphene films, as well as further advancements in the field expected to occur in the near future.

scholarly journals Corrosion protection of iron using porous anodic oxide/conducting polymer composite coatings

2015 ◽  
Vol 180 ◽  
pp. 479-493 ◽  
Author(s):  
Yoshiki Konno ◽  
Etsushi Tsuji ◽  
Yoshitaka Aoki ◽  
Toshiaki Ohtsuka ◽  
Hiroki Habazaki
Keyword(s):  
Oxide Layer ◽  
Composite Coating ◽  
Corrosion Protection ◽  
Composite Coatings ◽  
Anodic Oxide ◽  
Oxide Interface ◽  
Self Organized ◽  
Anodic Oxide Layer ◽  
Poor Adhesion ◽  
Protection Of Metals

Conducting polymers (CPs), including polypyrrole, have attracted attention for their potential in the protection of metals against corrosion; however, CP coatings have the limitation of poor adhesion to metal substrates. In this study, a composite coating, comprising a self-organized porous anodic oxide layer and a polypyrrole layer, has been developed on iron. Because of electropolymerization in the pores of the anodic oxide layer, the composite coating showed improved adhesion to the substrate along with prolonged corrosion protection in a NaCl aqueous corrosive environment. The anodic oxide layers are formed in a fluoride-containing organic electrolyte and contain a large amount of fluoride species. The removal of these fluoride species from the oxide layer and the metal/oxide interface region is crucial for improving the corrosion protection.

scholarly journals Corrosion resistance of hot-dip galvanized steel in chloride-containing medium

2019 ◽  
Vol 54 (4) ◽  
pp. 419-427
Author(s):  
L. S. Grischenko ◽  
N. P. Ivanova ◽  
V. G. Matys ◽  
V. A. Ashuyko
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Protection ◽  
Corrosion Inhibitors ◽  
Sodium Molybdate ◽  
Environmental Problems ◽  
Ammonium Metavanadate ◽  
Experimental Results ◽  
Galvanized Steel ◽  
Scientific Technical ◽  
Protection Of Metals

Today, corrosion and corrosion protection of metals are the most important scientific, technical, economic and environmental problems. The effect of additions of sodium molybdate, ammonium metavanadate, a mixture of sodium molybdate and ammonium metavanadate, thiourea and sodium orthophosphate on the corrosive behavior of hot-dip galvanized steel in a neutral and slightly alkaline chloride-containing medium has been studied. The experimental results obtained by weight and electrochemical methods proved sodium molybdate, ammonium metavanadate, a mixture of sodium molybdate and ammonium metavanadate, thiourea and sodium orthophosphate to be corrosion inhibitors that slow down the rate of destruction of hot-dip galvanized steel in a neutral and slightly alkaline chloride-containing medium by 1.5–11 times.

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