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Information × Registration Number 0220U102916, 0117U004523 , R & D reports Title Development of physical-chemical approaches to improve the reliability of leak hollow structures by chemical methods popup.stage_title Head Manoryk Petro A., Доктор хімічних наук Registration Date 24-06-2020 Organization L. V. Pisarzhevskii Institute Of Physical Chemistry of The National Academy of Sciences of Ukraine popup.description2 Conditions have been determined to ensure the removal of an aqueous solution of potassium dichromate from the through defect of the object of control for tightness by chemical method and transportation of this solution to the sorption-active layer formed on the outer surface of the object as a component of indicator coating sensitive to potassium dichromate. The substances and solvents required for the characteristics and composition are selected to fulfill these conditions. The analysis of conditions of use of inhomogeneous electric field as a factor of additional influence on speed of transportation of an aqueous solution of dichromate from through defect of object of control on tightness in the sorption-active layer formed on its external surface, on speed of evaporation of a volatile component of solution (water) from such layer and crystallization of a non-volatile component of the solution (potassium dichromate). The composition of the solution of reactive components of the catalytic reaction for the indication of potassium dichromate concentrated in the sorption-active layer was determined. Models of through defects and through defects of simulators of objects of control on tightness are made and calibrated. Means for estimating the rate of evaporation of water and aqueous solution of potassium dichromate from through defects, in particular, under the influence of inhomogeneous electric field. The peculiarities of the process of extraction of an aqueous solution of dichromate from such defects into the sorption-active layer formed on the outer surface of the simulators, concentration and crystallization of potassium dichromate in such a layer were studied, in particular under the influence of inhomogeneous electric field. New approaches have been proposed to increase the sensitivity of the control of the tightness of hollow objects by chemical methods.  Product Description popup.authors Grebennikov Vladimir M Evgen Leonenko V Manoryk Petro A Sidorova Natalia A Tverskov Olexandr Yu Shulzhenko Olexandr V popup.nrat_date 2020-07-03 Close