Functionalization Of Fillers To Prepare The Functional Anti-corrosion Coatings

The ubiquitous metal corrosion has caused enormous economic costs and damage to modern industrial societies and even posed a serious threat to human health and the environment.Due to the corrosive media continuous in-break into the coating,and the working environments of the coating are very harsh,the protective effect of traditional anti-corrosion coatings on the metal matrix is always very poor.Recently polymer based anti-corrosion coatings with multifunctional properties such as scale inhibition,anti-friction and superhydrophobicity.In this paper,the functional coatings are fabricated based on the epoxy resin and PPS resin,by using the multifunctional modified fillers to improve the anti-corrosion property.It is believed that this research will pave a new simple spraying way to design the multifunctional coatings for anti-corrosion applications.The main contents can be summarized as the following:(1)A novel multi-functional carrier of mesoporous titanium dioxide whiskers(Ti O2(w))modified by compound A and imidazoline was devised in epoxy coating to improve the anti-corrosion and scale inhibition properties of metal surface.Rigorous characterization using analytical techniques showed that a mesoporous structure was developed on the Ti O2(w).Compound A and imidazoline were successfully grafted on the outer and inner surfaces of mesoporous Ti O2(w)to synthesize i ETi O2(w).The results demonstrated that the corrosion resistance of the final i ETi O2(w)epoxy coating is 40 times higher than that of the conventional unmodified OTi O2(w)epoxy coating.The enhanced corrosion resistance of the i ETi O2(w)functional coating is due to the chelation of the scaling cations by compound A and electron sharing between imidazoline and Fe.Scale formation on the i ETi O2(w)coating is 35 times lower than that on the unmodified OTi O2(w)epoxy coating.In addition,compound A and imidazoline act synergistically in promoting the barrier property of mesoporous Ti O2(w)in epoxy coating.(2)The carbon-modified Si based porous fillers that function as micro-reservoirs to store lubricating oil as a low-friction and anti-corrosive agent in a composite coating.These novel oily particles were added to an epoxy resin(EP)-based coating to study the effect of a lubricating oil on the anti-corrosion and friction performances of the coating.Analysis by electrochemical impedance spectroscopy and sliding wear tests demonstrated that the presence of particles containing the lubricating oil significantly improved the barrier properties and the wear resistance of the EP coating.It was therefore apparent that the carbon surface modification of the celatom filler improved the compatibility of both the filler towardsthe resin.Thus,the addition of fillers containing lubricating oil further improved the wear resistance and anti-corrosion properties of the coatings.(3)Novel lypohydrophilic Si based porous fillers that can function as micro-reservoirs to store lubricating oil as a low-friction and anti-corrosive agent in a composite coating were developed.The novel oily particles were added to an epoxy resin(EP)-based coating to study the effect of lubricating oil on the anti-corrosion and the low-friction performance of the coating.The electrochemical impedance spectroscopy and the sliding wear tests demonstrated that the oily particles can significantly improve the barrier property and the wear-resisting performance of the EP coating.Furthermore,the friction coefficient of epoxy resin-25%lubricating celatom coating(0.4)was lower than that of the epoxy resin-25% PVDF coating(0.55),and the wear rate was lower by a factor of eight.The enhanced wear resistance can be mainly attributed to the lubrication performance of the lubricating oil stored in the porous particles.(4)The composite coating was based on organic–inorganic molecular hybrid Zinc oxide(Zn O)/Carbon Nanotubes(CNTs)-Poly(dimethylsiloxane)(PDMS)and Stearic acid compound.It was characterized in terms of their superhydrophobic properties and morphology.In optimized conditions,the contact angle(CA)for water and oil deposited on the composite coating were as high as 172°,154°,respectively.The composite coating maintained superhydrophobic behavior even soaked in the liquid with p H from 1 to 14.In addition,the resulting superhydrophobic composite coating showed good thermal stability,which could maintain hydrophobic even under a harsh environment with high temperature.