Anti-Corrosive and Scale Inhibiting Polymer-Based Functional Coating with Internal and External Regulation of TiO2 Whiskers

Abstract

Abstract:A novel multi-functional carrier of mesoporous titanium dioxide whiskers (TiO 2 (w)) modified by ethylenediamine tetra (methylene phosphonic acid) (EDTMPA) 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 TiO 2 (w). EDTMPA and imidazoline were successfully grafted on the outer and inner surfaces of mesoporous TiO 2 (w) to synthesize iETiO 2 (w). The results demonstrated that the corrosion resistance of the final iETiO 2 (w) epoxy coating is 40 times higher than that of the conventional unmodified OTiO 2 (w) epoxy coating. The enhanced corrosion resistance of the iETiO 2 (w) functional coating is due to the chelation of the scaling cations by EDTMPA and electron sharing between imidazoline and Fe. Scale formation on the iETiO 2 (w) coating is 35 times lower than that on the unmodified OTiO 2 (w) epoxy coating. In addition, EDTMPA and imidazoline act synergistically in promoting the barrier property of mesoporous TiO 2 (w) in epoxy coating. It is believed that this novel, simple, and inexpensive route for fabricating functional surface protective coatings on various metallic materials will have a wide range of practical applications.

Effects of TiO2 Nanoparticles on the Overall Performance and Corrosion Protection Ability of Neat Epoxy and PDMS Modified Epoxy Coating Systems

“…NaCl electrolyte even when it is applied at a larger thickness up to 150 ± 10 µm (Pourhashem et al, 2017). Moreover, the weak corrosion protection performance of epoxy based coating systems after such a short period of immersion time was reported by several researchers who studied the performance of neat epoxy coating films that applied with different thickness specifically at 120 µm (Chang et al, 2014), 130 µm (Li et al, 2015), and 250 µm (Wang et al, 2018).…”

Synthesis and characterization of hybrid materials based on graphene oxide and silica nanoparticles and their effect on the corrosion protection properties of epoxy resin coatings

“…According to the above-mentioned results, Figure 17 shows the schematic of the corrosion protection mechanism, which intuitively explains the barrier role of GO-SiO 2 nanohybrids in the epoxy matrix during the corrosion process. For neat epoxy, the corrosive agents (Cl À , O 2 and H 2 O) can penetrate through the coatings easily due to the existence of free volume and micro-pores that directly act as a diffusion pathway for corrosive species toward the coating/metal interface, so the neat epoxy coating had a poor protective performance [67]. After the incorporation of GO sheets in the polymer matrix, epoxy/GO coatings showed a limited corrosion barrier performance which may be related to the tendency of the sheets to form agglomerates and increase the hydrophilicity of the coating surface.…”

An Overview of the Polymeric Materials that can be Used to Prevent Metal Corrosion: A Review

“…Some papers suggested triazines, anilinopropionates, polymers, dyes, drugs, ionic liquids, natural products (plant extract) N-(6methoxyquinolin-4-yl)-pentane-1,4-diamine (MPD), N'-(7-chloroquinolin-4-yl)-N,N-diethyl-pentane-1,4diamine (CDPD), thiosemicarbazide, phenyl isothiocyanate, N-phenylhydrazine-1,2dicarbothioamide (PDA) and azorubine dye (AZB), streptomycin, cephalexin, ceftadizime (CZD), and eco-friendly polyaspartic acid (PASP) (25,(30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40) as different effective class of corrosion inhibitors on mild steel in HCl and H2SO4 solution interface and found the inhibitor efficiency to be about 90% and more respectively. To increase the counter consumption and scale restriction properties of metal surfaces, an uncovered multi-use bearer of mesoporous titanium dioxide whiskers (TiO2(w) (41) was contrived in epoxy covering and altered by ethylenediamine tetra (methylene phosphonic corrosive) (EDTMPA) and imidazoline, whereas (42) ginger concentrate as consumption inhibitor from normal assets was concentrated to forestall corrosion of mild steel in corrosive media. (43) PASAC3, PASAC 11 and PASAC13 organic corrosion inhibitors were examined for carbon steel in cooling water.…”