This paper reports the effect of the nanocarbon materials addition on the physicomechanical properties and corrosion protective ability of epoxy based paint coatings for the steel surfaces. In this work the nanotubes and nanosheets (layers) structures of nanocarbon materials were used for the investigation. The properties of received products were measured by the test techniques for paint coating characterization. The results showed that the addition of the nanocarbon materials (only ratio of 0.1 wt%) significantly improved the physico-mechanical performance and corrosion protection ability of epoxy coatings for steel surfaces. However improvement quantity depends on the structure of nanocarbon materials. The obtained results showed that the nanosheets structure of carbons coatings made the physico-mechanical properties of the epoxy coating increased better than those of nanotube structure.

The use of coatings of functionalized nanostructured carbon based composite to inhibit corrosion is an area getting much of attention among scientists and industrialists. Lately, Graphene has started to play an important role in many applications. Graphene possesses excellent mechanical and thermal stability, low chemical reactivity, impermeability to most of gases, and high transparency. Thanks to these properties, Graphene is so far finding some applications for protective coatings. However, Graphene is apolar and nanostructured, so that is difficult to be dispersed into polar polymers as epoxy resin. In this paper, results of using chemically modified Graphene to reinforce the physico-mechanical properties and corrosive resistance properties of the epoxy paint coating are presented. Graphene was modified by oxidative method with mixtures of H 2 SO 4 , H 3 PO 4 and KmnO 4 solutions. The properties of obtained products were characterized by somephysico-chemical methods such as Fourier transformed Infrared Spectroscopy (FTIR), X-ray diffraction (XRD). The physico-mechanical and anti-corrosion properties of paints based on chemically modified Graphene-epoxy nanocomposite have been exceptionally superior to that of paints based on epoxy and Graphene.

Developing problem-solving skills for 5-6-year-olds is an important task of early childhood education to make it easier for children to adapt to life. The development of a number of skills development measures for children 5-6 through familiarization with math should be based on the nature of the problem solving process and the real-life problem solving of children. Developing and coordinating the use of flexible groups of problem-solving skills development for 5-6-year-olds through the adoption of math skills such as: Creating problem-solving ability for children through acquaintance with math; Organize your child to practice problem solving; Organizing a child's problem-solving assessment helps to improve the problem solving skills of the child.