Influence of nickel concentration on the characteristics of the electroplating Zn-Ni alloy - Bui Thi Thanh Huyen4. CONCLUSIONS The morphology and structure surface of the electrodeposited Zn-Ni alloy coating depended on nickel concentration the plating bath. The Zn-Ni coatings with high nickel content, the crystals develop pyramidal orientation and the surface structures were single phase; the coatings with lower nickel content, the crystals were slightl...
7 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 515 | Lượt tải: 0
Corrosion protection and chacracteristics of Ni-CeO2-cuo electroplating layer on steel substrate - Mai Van Phuoc4. CONCLUSION The Ni-CeO2-CuO composite was successfully deposited on steel substrate by electroplating. It had a good corrosion resistance in 3.5 % NaCl solution and under salt spraying as well hygrothermal environment. This composite also had invaluable properties such as the hardness and wear resistance increasing 1.47 times and more than 3 ...
6 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 442 | Lượt tải: 0
Study on corrosion resistance of carbon nanotubes reinforced Al2O3 coating - Nguyen Van Tuan3.5. Erosion corrosion resistance Figure 9 shows the results of the erosion corrosion resistance test for the coating over time. The result shows that, the mass loss of Al2O3 sample is higher than that of CNTs/Al2O3 one at all measuring times after 24 - 168 hours of test. This indicates that the erosion corrosion resistance of CTNs reinforced c...
10 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 451 | Lượt tải: 0
Bentonite pillared by mesoporous silica and its application for gasoline treatment - Vo Thi My Nga4. CONCLUSIONS BHSMC can be able to join in Cumen cracking reaction with conversion 36.46 % at 350 oC, in the bed-flow system, WHSV = 1.72 h-1 and the selectivity of benzene is 73.98 %. Conversion, efficiency of gasoline and of LPG in Wax cracking reaction at 460 °C on BHSMC were the highest in comparison with other catalysts: BHSMC got convers...
7 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 472 | Lượt tải: 0
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: 471 | 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: 478 | 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: 437 | 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: 510 | 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: 479 | 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: 467 | Lượt tải: 0
