Preparation and properties of epoxy/basalt flakes anticorrosive coatings

Yan, Jun; Shi, Jinjie; Zhang, Peigen; Tian, Wenbin; Zhang, Yamei; Sun, ZhengMing

doi:10.1002/maco.201810039

Cited by 18 publications

(9 citation statements)

References 35 publications

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“…The impedance magnitude at the highest frequency determines the electrolyte resistance while the one at the lowest frequency represents the resistance to corrosion. [20,21] The former is regarded as unchanged while the latter changes greatly, as shown in Figure 5. More specifically, the impedance magnitude |Z| for sample S1 is larger than 10 4 Ω•cm 2 , which is greater than those for samples S5 and S1′.…”

Section: Analysis Of Eis Testsmentioning

confidence: 99%

Anticorrosion property enhancement of Al–Li alloy 2A97 by lowering machined surface roughness

Niu

Wang

et al. 2020

Materials & Corrosion

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In this study, after face-milling Al-Li alloy 2A97 under dry machining condition, the machined surface roughness S a and S z are dealt with statistical analyses. Then, the supplementary face-milling trials are conducted to verify the analyses and gain the effect of the feed rate per tooth (f z) on S a and S z. Lastly, the electrochemical impedance spectroscopy tests are conducted on the machined surfaces to determine their corrosion resistance. The variance analyses show that although f z and the depth of cut are more important than the width of cut and the cutting speed, each of the four parameters is individually insignificant to S a and S z. Therefore, the quadratic regression models that take the interaction effects of the parameters into consideration are established. The validity of the models is proved with the comparisons between the measured and calculated S a and S z. The equivalent circuit models are proposed on the basis of the shape characteristics of the impedance spectra for machined surfaces. The estimations from the circuit models reveal the superiority in the corrosion resistances of face-milled surfaces with the optimized surface roughness.

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Section: Analysis Of Eis Testsmentioning

confidence: 99%

Anticorrosion property enhancement of Al–Li alloy 2A97 by lowering machined surface roughness

Niu

Wang

et al. 2020

Materials & Corrosion

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“…It is very important to protect metals and alloys from corrosion by organic coating. [1][2][3] Polyurethane (PU) and epoxy coatings are highly resistant to abrasion and corrosion and have good adhesion to substrates. PU is also widely used in the manufacturing and defense industries.…”

Section: Introductionmentioning

confidence: 99%

Studies on coatings containing nano‐zinc oxide for steel protection

Shmait

Awad

Rahal

et al. 2020

Materials & Corrosion

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Zinc oxide (ZnO) nanoparticles (NPs) were synthesized using the coprecipitation method. The resulting NPs were characterized by X‐ray diffraction, transmission electron microscopy, and Fourier transform infrared spectroscopy. The surface morphology of the coatings has been characterized by scanning electron microscopy (SEM). SEM images show a uniform and homogeneous distribution of ZnO‐NPs in polyurethane (PU) coatings while aggregates appear in epoxy coatings. Using tensile stress–strain test, the effect of the addition of ZnO‐NPs on the mechanical properties of PU and epoxy coatings was examined. The addition of ZnO‐NPs has enhanced the Young's modulus and the tensile strength of PU and epoxy coatings. Through the open‐circuit potential and electrochemical impedance spectroscopy measurements, the anticorrosive properties of PU‐ or epoxy‐coated mild steel panels containing ZnO‐NPs have been investigated in 0.5 M NaCl solution. Nyquist impedance plots for PU and epoxy coatings in PU‐ or epoxy‐coated mild steel panels containing ZnO‐NPs were tested in the absence and presence of ZnO‐NPs have different responses. It has been shown that the dispersion of ZnO‐NPs significantly improves the anticorrosive performance of PU coatings. A PU coating containing 700 mg/kg ZnO‐NPs is recommended to achieve better mechanical properties and corrosion resistance.

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“…Broughton et al [6] found that GFs modified with aminosilane had higher stiffness and strength than GFs modified with titanate. Yan et al [7] studied the alkali/acid resistance of epoxy/basalt flake coatings and concluded that good chemical durability will improve the anticorrosive property of epoxy coatings.…”

Section: Introductionmentioning

confidence: 99%

Study of a Nano-SiO2 Microsphere-Modified Basalt Flake Epoxy Resin Coating

et al. 2019

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Basalt flakes (BFs) have been widely used in recent years as a novel anticorrosion material in the marine industry to prevent the corrosion of metal substrates. In this study, BFs were modified with 1–7‰ nano-SiO2 microspheres, and a modified BF epoxy coating was successfully prepared. Experimental results showed that the BF epoxy resin coating modified with 3‰ nano-SiO2 microspheres exhibited excellent chemical durability (surface weight loss rate of 2.2% in the alkali solution and only 1.1% in the acid solution at room temperature after 480 h), low water infiltration (water absorption of 0.72% after 480 h), and good mechanical performance (tensile strength of approximately 33.4 MPa). This study proves the feasibility of using nano-SiO2 microspheres to modify BF epoxy resin coating and enhance the chemical durability and mechanical properties provided by the coating.

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Preparation and properties of epoxy/basalt flakes anticorrosive coatings

Cited by 18 publications

References 35 publications

Anticorrosion property enhancement of Al–Li alloy 2A97 by lowering machined surface roughness

Anticorrosion property enhancement of Al–Li alloy 2A97 by lowering machined surface roughness

Studies on coatings containing nano‐zinc oxide for steel protection

Study of a Nano-SiO2 Microsphere-Modified Basalt Flake Epoxy Resin Coating

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