Nanotechnologies in Construction: A Scientific Internet-Journal

20-36

Authors: Baikov I.R., Smorodova O.V., Kitaev S.V.

Today multilayer metal-plastic pipes manufactured by means of special technologies are becoming widely applied. The main advantages of the so-called nanocomposite pipes are the increased service life (up to 80–100 years) and high corrosion resistance. The paper considers energy aspect of application of nanocomposite pipes in utility systems. It was shown that due to the low roughness, even at the initial stage of operation, electric power consumption for driving pumps in nanocomposite systems is almost 1,5 times lower respect to steel pipelines. In the long term, due to the buildup of deposits in steel pipelines, the effect increases by an average of 8% for each subsequent year of operation.

94-106

Authors: Sergeyeva O.Yu.

The relevance of the topic of the article is that Russia has launched a largescale system program for the development of the economy of the new technological generation based on the industrial concept «Industry 4.0» through its digitalization and restructuring, using innovative tools and mechanisms. Cyberphysical systems (CPS) represent highly efficient technological processes that unite the real and virtual worlds in order to form a single networked space where «smart objects» communicate with each other. CPS are evolutionary followers of embedded systems. Cyberphysical systems play a leading role in solving problems related to the lack of natural resources, sustainable mobility and energy changes

127-137

Authors: Maskova A.R., Mazitova A.K., Aminova G.K., Rolnik L.Z., Faizullina G.F.

Polymer materials based on polyvinyl chloride (PVC) are processed in the form of multitudinous compositions. One of the main indicators in the processing of polymer compositions is manufacturability. It is known that in the processing of polyvinyl chloride compositions manufacturability is estimated by rheology of melts. The determine polymer processability the melt flow index (MFI) is the most widespread and almost universally used value. The melt flow index of the polymer material is the mass of polymer in grams extruded through the capillary at a certain temperature and pressure overfall in 10 minutes. It allows us to take decisions on the necessary conditions of processing the polymer composition and to determine the temperature limits of converting.

167-178

Authors: Latypova D.R., Latypov O.R., Bugai D.E.

The paper presents the results of the research that studied how the penetration depth of pitting corrosion in the surface structures of clad steel depends on the steel surface electrode potential. The tests were carried out on the stainless surface of the samples made from steel 09G2S/08X13, which is widely used in production of metal structures for the oil and gas industry due to its necessary mechanical properties and corrosion resistance. The operation process of this steel runs in the technological environment with high corrosivity.The influence of pitting components of the corrosive medium (Сl– и S2O3 2– ions) on the diffusion of oxidants and the development of local processes of destruction of a passive film is shown. It is noted that the maximum influence of the electrode potential on the development of pitting corrosion occurs in the area of secondary passivation. In this case, the depth of pitting can reach 180 μm.