On the Possibility of Using Nitro-, Amino-Containing Resinous Waste in the Preparation of a Metal Surface for Painting
S. I. Sokhina, O. N. Shevchenko, Ye. V. Mukonina
Donbas National Academy of Civil Engineering and Architecture
Abstract: Resinous waste of organic synthesis of the Crimean plant «Himprom», containing inhibiting the corrosion process of amino and nitro groups, can be used as etching additives in the preparation of the metal surface for painting with the use of etching in hydrochloric and sulfuric acids. The inhibition of the corrosion process, studied by the potentiostatic method on the P5827M potentiostat and by the gravimetric method, is manifested in the concentration range of 0.28…0.44 wt. % in a solution of hydrochloric acid and 0.035…0.550 wt.%. in a 1h solution of sulfuric acid, the protective effect is 70 %. At the same time, the studied waste belongs to the mixed-type inhibitors under mixed control, since there is an increase in polarizability at the anode and cathode sites of corrosion processes. The use of inhibitory resinous waste as pickling additives involves precise control of their concentration, both at the upper and lower limits of a certain interval, since these additives can be characterized as «dangerous» inhibitors, i. e., depending on the concentration, they can both inhibit and stimulate (catalyze) iron corrosion. Recycling of the considered waste into inhibitory additives of pickling solutions will improve the environmental cleanliness of production.
Keywords: acid etching inhibitors, potentiostatic studies, utilization of amino-nitro-containing resinous wastes of chemical production.
Pages: 107-113.
Link for citation: Sokhina, S. I.; Shevchenko, O. N.; Mukonina, Ye. V. On the Possibility of Using Nitro-, Amino-Containing Resinous Waste in the Preparation of a Metal Surface for Painting. – Text : electronic. – In: Proceeding of the Donbas National Academy of Civil Engineering and Architecture. – 2021. – Issue 2021-1(147) Modern building materials. – Р. 107-113. – URL: https://donnasa.ru/publish_house/journals/vestnik/2021/2021-1(147)/st_14_sohina_schevchenko_mukonina.pdf (date of access: 15.10.2024). (in Russian)
Issue 2021-1 (147)Journal: Proceeding of the Donbas National Academy of Civil Engineering and Architecture
Publish house: Donbas National Academy of Civil Engineering and Architecture