Evaluation of synergistic effect of nanozinc/nanoclay additives on the corrosion performance of zinc-rich polyurethane nanocomposite coatings using electrochemical properties and salt spray testing

Anticorrosion efficiency of zinc-filled epoxy coatings containing conducting polymers and pigments

“…The corrosion product prevents zinc corrosion and also hinders the http://dx.doi.org/10.1016/j.porgcoat.2014. 10.009 0300-9440/© 2014 Elsevier B.V. All rights reserved. Corrosion changes on the surface of a coating material pigmented with zinc (spherical particles), caused by exposure to a humid/moist environment [1].…”

“…The highest electric conductivity is achieved at zinc particle concentrations of 92-95% (w/w), the binder content then being a mere 5-8%. Such low binder content, however, is insufficient for the coating material to attain the required physico-mechanical properties -adhesion, impact resistance and cupping resistance are reduced substantially [10].…”

Hybrid Zinc-Rich Paint Coatings

“…There were some works aiming to characterize liquid ZRPs, 2 working out their modeling by means of electrochemical impedance spectroscopy (EIS), 2,3 analyzing the duration of active-passive protection terms 4 andpretreatment of the surface of steel substrate rust converter 5 and investigating the influence of salt contamination of the interface, 6 pointing out the difference between the early-stage and later-stage diffusions of zinc and iron corrosion products impacting the overall protection performance. A number of studies have disclosed the effects of pigment volume concentration (PVC), 7-12 the zinc grain size range from microns to the nanometer range [12][13][14][15][16][17] or the spherical and lamellar 8,10,18 shape 8,18-20 of the pigments. Nonetheless, a combination of the spherical and lamellar pigments gives the best performance.…”

“…41 The latter type efficiently protects even aluminum alloys, which generally means a lower, inhibited corrosion rate of the pigments compared to pure magnesium-rich coatings. 42 The application of additives such as zinc oxide 8 and high-quality well-dispersed clay minerals 16,32 at very low zinc content (as little as 10 wt.%) 17 indicated firm barrier behavior and long-term galvanic function. 42 The application of additives such as zinc oxide 8 and high-quality well-dispersed clay minerals 16,32 at very low zinc content (as little as 10 wt.%) 17 indicated firm barrier behavior and long-term galvanic function.…”

Eco‐friendly, acrylic resin‐modified potassium silicate as water‐based vehicle for anticorrosive zinc‐rich primers

“…[13][14][15][16] To improve the corrosion resistance of the Zn-rich coatings, several investigations have been performed such as partial replacement of zinc particles by micaceous iron oxide or lamellar Al particles. 6,17,18 Also addition of nanoparticles like nanozinc/nanoclay 19,20 as well as binder formulation modification 17,21 has been investigated.…”