DEVELOPMENT OF INGIBITOR COMPOSITION OF CORROSION FOR PROTECTION OF STEEL ARMATURE
Author: Jumaniyazova Dilnoza Maxsudovna, Zakirov Baxtiyor Sabirjanovich, Jumaniyazov Maxsud Jabbiyevich
Abstract:
For over 150 years, reinforced concrete structures have been used in construction. A long-term study of the durability of reinforced concrete structures in various operating conditions shows that dangerous damages caused by the development of reinforcement corrosion, which pose a threat to public health, are often encountered. Corrosion of reinforcement is usually caused by exposure to reinforced concrete by atmospheric chemical factors caused by the presence of aggressive components in concrete, such as sulfates, carbonates, chlorides. Today in domestic practice there are over 100 different compositions for inhibiting the corrosion of reinforcing steel. The best results are achieved with the use of inhibitory additives to the cement of sodium and calcium nitrites. The disadvantages of the existing anticorrosive materials are their high cost and low accessibility, as well as the impossibility of using them to combat multicomponent salt and acid corrosion. In the conditions of the Aral Sea region, in the production of reinforced concrete products, highly saline water and quartz sand are used, which contain chloride and sulphate salts of calcium, magnesium and sodium in various amounts (Table 1). With the presence of the listed salts in the composition of reinforced concrete products, steel reinforcement is subjected to severe corrosion. Therefore, one of the important tasks is the protection of steel reinforcement in concrete products produced in the conditions of the Khorezm region and the Republic of Karakalpakstan.
THE RESEARCH RESULTS OF DEHYDRATION PROCESS OF GOSSYPOL RESIN
Author: Kurambaev Sh. R., Aitova Sh. K., Ermetov A. I.
Abstract:
This article is focused on the results of dehydration process of the oil and fat waste products- gossypol. The research was held in the temperature interval from room temperature until 160 degrees Celsius while constant shuffling.