Elastic properties of epoxy system coatings on aluminum substrate

Chrobak

et al. 2013

SSP

In the present paper magnetic and elastic properties of the Ni+SrFe12O19 nanocomposites were examined in detail. Samples were in two forms: i) mechanically pressed cylindrical pellets and ii) filled polymer (amine-epoxy resin) coating on aluminum substrate. The so called apparent Young’s modulus was determined by measurements of the free flexural vibrations frequency by means of vibrating reed technique. Magnetic research was carried out using VSM magnetometer. It was shown that replacement of SrFe12O19 with nano Ni powder results in an increase in material resistivity to elastic deformation. The influence of size reduction of SrFe12O19 powder particles on magnetic parameters of the studied nanocomposites were discussed in detail.

Section: Methodsmentioning

confidence: 99%

Magnetic and Elastic Properties of Nanocomposites Containing Soft (Ni) and Hard (SrFe12O19) Magnetic Particles

Chrobak

et al. 2013

SSP

“…where Y(x, t), ,I , , are the displacement of neutral axis of the beam at distance to the left end, the longitudinal elastic modulus, geometric moment of inertia of the cross section of the beam with respect to the neutral axis, the area of this section and material density while the subscripts 1 and 2 refer to the substrate and the coating, respectively [5][6]. The characteristic equation for freefree boundary conditions is:…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Influence of some Oxide Coating Layers on the Mechanical Properties of Steel Plates

Bereteu

Vodă

Pascu

et al. 2015

AMR

The paper presents a vibroacoustic method to determining the stiffness of coated steel with various materials such as metal oxides, metallic paints, polymers etc and Young's modulus for coating materials. The method consists in measuring the dynamic response of the steel in the form of a rectangular bar subjected to external impulse. One of the latest non-destructive experimental techniques in this field is based on the analysis of vibrating signal response recorded with a condenser microphone. A Fast Fourier Transform algorithm is used for processing the sampled signals. Knowing the mechanical properties of steel plates prior to coating with metal oxides, and determining the same properties after coating, can be obtained the mechanical properties of metal oxides and their influence on the properties of the ensemble.

J of Applied Polymer Sci

“…Among the available anticorrosive techniques, epoxy coating systems are the most common type of protective coating. They not only possess outstanding processability but also exhibit excellent adhesiveness and weather resistance 7–10 . In addition, the coating process is environmentally friendly and chemically stable with low volatility 11,12 .…”

Section: Introductionmentioning

confidence: 99%

“…They not only possess outstanding processability but also exhibit excellent adhesiveness and weather resistance. [7][8][9][10] In addition, the coating process is environmentally friendly and chemically stable with low volatility. 11,12 Furthermore, the addition of intrinsically conducting polymer (ICP) nanofillers, such as polyimide, polypyrrole, polythiophene, and polyaniline (PANI), to epoxy coatings can remarkably improve the anticorrosion properties.…”

Section: Introductionmentioning

confidence: 99%

Anticorrosion performance of polyaniline/clay nanocomposites in epoxy coatings

Kang

Wang

Chen

2022

Thickness-tunable triple-layer polyaniline (PANI)/clay nanocomposites were synthesized via in situ intercalative polymerization of PANI within the clay layers. The PANI/clay nanocomposites were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis. In this study, the thickness of the PANI/clay nanocomposites was easily controlled by adjusting the proportions of PANI and pristine clay. Based on oxygen transmission rate measurements, the oxygen barrier properties of pristine clay can be enhanced by the growth of PANI. Notably, the oxygen barrier property of epoxy loaded PANI/clay nanocomposites was linearly dependent on the PANI growth thickness. After 30 days immersion electrochemical impedance spectroscopy test under saline conditions, the resistance (R c ) of the pure epoxy coating (2.47 Â 10 6 Ω) increased to 5.76 Â 10 10 Ω when 1 wt.% PANI was added to the epoxy coating. However, when 1 wt.% PANI/clay was added into the epoxy coating, the R c of the composite coating increased further to 7.66 Â 10 11 Ω. Notably, the ratio of PANI to PANI/clay was only 36.5 wt.%, indicating synergistic anticorrosion properties can be obtained by the intercalation of PANI/clay additives. Therefore, PANI/clay nanocomposites have a high potential as anticorrosion additives for industrial epoxy resin coatings.