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  • Overview: Advances and Challenges in Analyzing and Diagnosing Product Defects by Digital Methods

    The article provides an overview of the analysis and diagnosis of product surface defects, evaluated using digital image processing. The search for scientific publications was carried out mainly in the Scopus and RSCI scientometric bases for the period 2019-2023. The purpose of this article is to determine the best methods for assessing the destruction of materials using digital images. The main methods of processing and analyzing digital images are considered. The perspective of unification of segmentation modes by digital image acquisition sources and combining images from various recording sources to obtain objective information on the nature of material destruction is shown. To reduce the time for assessing the degree of destruction of materials, it is proposed to gradually use the methods of segmentation, filtering digital images of defects in metal products with subsequent calculation by a neural network.

    Keywords: defect, control, digital image, neural network.

  • Quality indexes and reduction of labor-intensive characteristics of researches for paint coatings by applying digital technology to surface analysis of coatings

    Annotation: The possibility of quality assessing of paint coatings by using the products surface conditions analysis through the use of digital technologies is shown. In the conditions of industrial enterprise, the comparative analysis of АК-1301 and Tikkurila Metallista coatings condition, exposed to aggressive environments: water, gasoline is carried out. From digital images of the surface, adhesive strength and the porosity of the coatings before-and-after the effects of the environments were assessed. It is shown that АК-1301 enamel has the highest adhesive strength and chemical resistance to water and gasoline.

    Keywords: paint coating, adhesion, surface porosity, corrosive environment, digital image, pixel

  • Determination of adhesion by digital image processing of surface coatings

    A program has been developed that allows to evaluate the adhesion of paint coatings by means of analyzing images of the surface of coatings with delamination’s from the substrate to be protected. The program is written in Kotlin using JavaFX platform and is focused on tests carried out by the method of lattice cuts within the conditions of paint and varnish production. Through the work the evaluation of the area of the coating detachment from the surface to be protected is being held and the obtained result is scored by points according to the method of lattice cuts. The use of the program does not require a large computing power of the computer and reduces the time for obtaining the calculating results for one sample from 20 minutes to 3 seconds.

    Keywords: adhesion, lacquer coatings, notch method, Kotlin language, JavaFX

  • Complex approach towards the calculation of technological parameters influence onto Na-CMC rheological properties for drilling agents

    The possibility of getting natrium-carboxymethylcellulose with given viscosity from different raw materials for oil industry is shown in the paper. The regression model, connecting rheological characteristics viscosity with parameters of the technological process is proposed. The program for IDE Microsoft Visual Studio medium which may be used for calculating Na-CMC synthesis parameters, providing the given in the frames of the technological process viscosity value, is developed.

    Keywords: natrium-carboxymethylcellulose, rheology, viscosity, etherification, alkalinity

  • Generation of materials with managed voids rating in process of forming of biological polymer of NA-sodium carboxymethyl cellulose with fine particles of AlOOH for production of functional coatings

    New highly-porous film materials were created based on NA-sodium carboxymethyl cellulose, modifyed by particles of AlOOH. Forming of covers happen as a result of relatively not high temperatures (for about 55 degrees of centigrades). A regression model was suggested which described interrelation between sizes of forming porouses in the film cover with its composition. The ability was shown to manage physical specification of the cover which named surface porosity by changing containing of AlOOH in the composition. It was shown up that porouses were formed sizes between 300 mircometers and 2500 mircometers in proccess of curing of the cover while containing of boehmite in the composition. It was discovered that the general surface porosity was 65%, and the depth of cover was 600 mircometers. The ability was shown to create covers with sliding properties as exemplified in closing of pores by solid lubrication MoS2. It was discovered that it was observable down drag by 30-50% in response to application of covers on steel faces adding down of frictional force.

    Keywords: Porosity, NA-sodium carboxymethyl cellulose, AlOOH, ntifriction material, MoS2, friction

  • The influence of Fe powder on the electrical properties of the functional coatings based on polymer Na-CMC

    Investigated the influence of contents of sodium - carboxymethylcellulose, glycerin and powder Fe on electrical properties of composite coatings. Proposed regression model describing the relationship of the values of the electrical resistivity of the coating and dielectric strength to their composition used to predict the electrical properties of the formed coatings. Showed the correlation between the microstructure of coatings with Fe powder and electrical properties.

    Keywords: sodium-carboxymethylcellulose, the iron powder, dielectric strength, resistivity, composite material

  • Generation of pores in films based on Na-КМЦ polymer with ti-powder including addiction of boehmitу nanoparticles

    Possibility of generation of porous films with filling of Na-КМЦ polymer with ti powder and boehmite nanoparticles was shown, the temperature of thermal decomposition of developed material was defined: 325° C . It was established that homogeneous pores were formed in films when Shannon entropy achieved the lowest value and chemical composition of composite materials didn't change in curing.The correlation between Shannon entropy and generating of homogeneous cells with radius above 125 micrometers was explored.

    Keywords: sodium-carboxymethylcellulose, titan powder, nanoparticles, boehmite