Ffects of additives, pigment and filler on physicomechanical properties and weather resistance of polyurea coatings - Nguyen Thi Bich Thuy4. CONCLUSIONS A novel polyurea coating composition with 0.2 wt% Raybo 3 antisilk flow resistance agent (of total paint composition), 1 wt% Texaphor dispersing agent (of total filler and piment), 2.8 wt% DOP (of total paint composition), 32 wt% BaSO4, 50 wt% TiO2, and 3 wt% nanoclay was proposed and the best physico-mechanical characteristics w...
11 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 544 | Lượt tải: 0
Understanding corrosion behavior of Zn and Zn alloy galvanized steels in humid tropical climate - Nguyen Nhi Tru4. CONCLUSIONS Corrosion rates of hot dip zinc coatings at Nha Trang coastal site exceed the values obtained for My Tho rural atmosphere by several times. Meanwhile, hot dip Zn-Al coatings express higher corrosion resistance at both atmospheres. The corrosion process obeys an equation of the form M = Atn, where M is the loss of metal and t is t...
13 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 537 | Lượt tải: 0
Study on highly alloyed steel anode coated by mixed metal oxides SnO2 - Sb2O3 thin film and application in wastewater treatment - Huynh Thu Suong4. CONCLUSIONS SnO2 and Sb2O3 mixed oxides coating layer is successfully prepared on highly alloyed steel Cr18Ni12Ti by dipping - thermal decomposition method from the solution of SnCl4 and SbCl3 with isopropanol and HCl medium. The changing of phase structure, morphology, resistivity, HV hardness and corrosion resistance of coating layer depen...
8 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 557 | Lượt tải: 0
Study on electro-Oxidation of glycerol in alkaline medium using trimetallic Pt-Pd-Ni composite electrodeprepared on glassy carbon - Huynh Thi Lan PhuongTable 3 shows that the rate of electro-oxidation reaction of glycerol with using Pt-PdNi/GC electrode is faster than using Pt-pure. The obtained results were consistent with the results shown in Table 2 and in the analysis cyclic voltammogram [6]. 4. CONCLUSION In summary, cyclic voltammetry method studied process electro-oxidation of glycerol i...
6 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 579 | Lượt tải: 0
Corrosion inhibition of carbon steel by LDH/GO hybrid intercalated with 2-Benzothiazolythiosuccinic acid - Nguyen Thuy Dương4. CONCLUSIONS Layered double hydroxide/graphene oxide hybrid intercalated with corrosion inhibitor 2- benzothiazolylthio-succinic acid was successfully synthesized using the coprecipitation method. The polarization curves obtained on carbon steel show that LDH-BTSA and LDH/GO-BTSA are anodic corrosion inhibitors and their efficiencies at the c...
7 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 544 | Lượt tải: 0
Department of inorganic chemistry - Group VIa - Oxygen family - CalcogensThe burning of coal and petroleum by industry and power plants liberates huge amounts of sulfur dioxide (SO2) which reacts with atmospheric water and oxygen to produce sulfuric acid. This sulfuric acid is a component of acid rain, which lowers the pH of soil and freshwater bodies, resulting in substantial damage to the natural environment and chemi...
48 trang | Chia sẻ: yendt2356 | Ngày: 28/11/2020 | Lượt xem: 524 | Lượt tải: 0
Magnetic properties and magnetocaloric effect of Fe90-XPrxZr10 rapidly quenched alloys - Nguyen Hoang Ha4. CONCLUSION The influence of Pr concentration on the magnetic properties and magnetocaloric effect of the Fe90-xPrxZr10 (x = 1, 2 and 3) rapidly quenched alloy ribbons have been investigated. The ribbons manifest their almost amorphous structure and soft magnetic behavior. Magnetic phase transitions of the alloy ribbons can be regulated by ch...
7 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 458 | Lượt tải: 0
Dynamic effects of dipolar interactions on the specific loss power of Mn0.7Zn0.3Fe2O4 - Pham Hong Nam4. CONCLUSION In summary, we studied the role of the magnetic interaction between magnetic clusters on heating dissipation of magnetic fluid of prepared Mn0.7Zn0.3Fe2O4 nanoparticles in an alternating field. Our results implied that magnetic interactions between magnetic clusters affect directly to the large value of the SLP for Mn0.7Zn0.3Fe2O4...
9 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 531 | Lượt tải: 0
A close correlation between disorders-Defects and superconducting transition temperature Bi1.6Pb0.4Sr2Ca2-xNaxCu3O10+δ superconductors - Tran Hai Duc3. CONCLUSIONS In the present work, the Bi1.6Pb0.4Sr2Ca2-xNaxCu3O10+δ samples (with x was ranged from 0.00 to 0.06) were fabricated by using the conventional solid state reaction technique. The structural properties of the samples examined by using XRD and SEM measurements showed that Na-substitution enhanced formations of the Bi-2223 phase. Th...
9 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 573 | Lượt tải: 0
Bài giảng công nghệ sản xuất các chất vô cơ cơ bản - Chương IV: Sản xuất Photpho và axit H3PO4 - Nguyễn Văn HòaSo với phương pháp dihydrat thì phương pháp HH Ưu điểm Giảm chi phí đầu tư hệ thống cô đặc Sản phẩm H3PO4 tinh khiết hơn Yêu cầu quặng nghiền thấp hơn Nhược điểm Tốc độ lọc thấp hơn Mất mát P 2O5 nhiều hơn Ăn mòn thiết bị cao hơn Đóng cặn trong đường ống và thiết bị
50 trang | Chia sẻ: yendt2356 | Ngày: 28/11/2020 | Lượt xem: 756 | Lượt tải: 0
