A study on the kinetics of oxygen reduction focoar - Le Quoc Khanh. CONCLUSIONS Deoxygenated kinetics was studied using 20 g to 60 g FOCOAR deposed in PET minienvironments. The obtained result shows that all the tests have deoxygenated approximately to the end of up to 0% which manifest a possibility to form poor oxygen minienvironments for the antioxidant preservation. The greater the amount of reducing agen...
8 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 513 | Lượt tải: 0
Effect of anion groups on corrosion inhibition behaviours of VietNam orange peel essential oil for mild steel in the acidic media - Bui Thi Thanh HuyenThe SEM images show that the mild steel surface before testing is quite smooth (Fig. 4a), but the specimen in 1N HCl solution is rough and appeared like full of larger pits and cavities (Fig. 4b), while the metal surface immersed in 1N H2SO4 is general corrosion (Fig. 4c) after 1 hour immersion. According to some authors, the pitting corrosion o...
8 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 403 | Lượt tải: 0
A study on praseodymium 4 - Hydroxycinnamate as an inhibitor for carbon steel in fresh cooling water system of ca mau fertilizer plant4. CONCLUSIONS Mixed inhibition of carbon steel was achieved using the Pr(4OHCin)3 compound. Electrochemical characterization confirmed the mixed inhibition mechanism, as well as demonstrating the synergism of the two Pr3+ and 4OHCin- components of the inhibitor complex. Surface characterization combined with electrochemical results confirmed t...
9 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 461 | Lượt tải: 0
Synthesis and structural characterization of Palladium(II) complexes with tetradentate N2O2 and bidentate no-Donor salicylaldehyde schiff base ligands - Lam Quang Hai4. CONCLUSIONS Synthesis and characterization of complexes containing tetradentate N2O2 and bidentate NO-donor Schiff base ligands have been described in this paper. The spectroscopic data of the complexes give good evidence of proposed structure. The results of IR, ESI - MS, 1H-NMR, 13C-NMR, HMBC and HSQC spectroscopies indicated that the mola...
8 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 445 | Lượt tải: 0
Simultaneous determination of dopamine in the presence of ascorbic acid and Uric Acid by electrochemically oxidized screen printed carbon electrode - Nguyen Xuan VietDPV curves for detection of DA in the simultaneous presence of AA and UA are shown on Figure 6. The concentration of AA and UA was kept constant of 1mM and 0.035 mM respectively, in that time the concentration of DA was increase from 1.0 to 50.0 M. The current intensity of DA peak increases when the concentration of DA increases. These DPV curve...
8 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 493 | Lượt tải: 0
Corrosion characterizations of carbon steel in cai tau river water system - Viet Nam4. CONCLUSIONS This study mainly highlights the importance of corrosion problem of Cai Tau river water cooling system. The main reason leading to this phenomenon was due to the presence of chemical compositions in the Cai Tau river water such as Cl‾, SO42-, CO32- and pH. The solutions containing different ion contents, i.e. Cl‾, SO42-, CO32- an...
12 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 429 | Lượt tải: 0
Protection of steel JISG 3141 with chromium-Free conversion coating based on inorganic salt (Zr/Ti/Mo) - Duong Thi Hong Phan4. CONCLUSION The SPCC-JISG 3141 was treated successfully by Zr/Ti/Mo- based conversion coating. The surface morphology and composition of Zr/Ti/Mo-treated samples were studied. Results obtained from SEM/EDS revealed that Zr/Ti/MoCC formed did not uniformly cover the surface of steels. Moreover, the adhesion and corrosion protection properties ...
9 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 429 | Lượt tải: 0
Bài giảng Hóa học - Chương 13: Nhóm VIIbAnhidrit perenic Re2O7 là chất rắn màu vàng, rất bền, không phân hủy khi nóng chảy và bay hơi, tác dụng với nước tạo axit perenic HReO4 Muối perenat không màu, bền hơn muối pemanganat. KReO4 bay hơi trên 1000 oC không bị phân hủy tính chất OXH của ReO4- rất yếu
31 trang | Chia sẻ: yendt2356 | Ngày: 28/11/2020 | Lượt xem: 976 | Lượt tải: 0
A study on physico-Mechanical and anticorrosive properties of chemically modified graphene-based epoxy nanocomposite coatings - Phan Thi Thuy Hang4. CONCLUSIONS - The pristine Graphene material was successfully chemically modified via modified Tour’s method. The formed products are Graphene Oxide (GO), which are only decorated oxygen containing functional groups on the Graphene sheet surfaces but unchanged the crystal structure of Graphene. - The physico-mechanical properties of the epo...
10 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 469 | Lượt tải: 0
Characterization of fluoridated hydroxyapatite (FHA) Sol-Gel coatings on titanium substrate - Ngo Thi Anh Tuyet4. CONCLUSION The sol-gel hydroxyapatite HA and fluoridate hydroxyapatite (FHA) coatings were deposited on Ti substrate by spin coating technique with heat treatment at 900 oC for 4 hours. The incorporation of fluorine ion into HA crystal structure by substitution of F- ions for OH- groups lead to improve properties of biocompatible coatings. A...
7 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 471 | Lượt tải: 0
