The Experts below are selected from a list of 2418 Experts worldwide ranked by ideXlab platform
Bo Zhang - One of the best experts on this subject based on the ideXlab platform.
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inhibitive effect of Sodium Molybdate on the corrosion behavior of galvanized steel in simulated concrete pore solution
Construction and Building Materials, 2018Co-Authors: Yanqi Wang, Bo ZhangAbstract:Abstract To limit rapid dissolution of zinc and hydrogen evolution of zinc coating in fresh concrete environments at the early stage, the corrosion inhibition of Sodium Molybdate for galvanized steel in simulated concrete pore solutions with/without chloride ion addition was studied. The inhibitive effect of Sodium Molybdate was assessed by open circuit potential (OCP), potentiodynamic polarization test, polarization resistance measurement, scanning electron microscopy/energy dispersive spectrometry (SEM/EDS) and X-ray photoelectron spectroscopy (XPS) tests. The results showed that the formation of a Mo-containing film at the corroding interface occurred, which acted as a barrier effect to suppress the rapid dissolution and hydrogen evolution of the zinc layer in the high alkaline environments. Meanwhile, the presence of Sodium Molybdate also modified the formation and properties of the corrosion products formed on the sample surface.
Dennis R Robitaille - One of the best experts on this subject based on the ideXlab platform.
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corrosion inhibition by Sodium Molybdate
Journal of Chemical Technology & Biotechnology, 2007Co-Authors: Alan W Armour, Dennis R RobitailleAbstract:The ability of Sodium Molybdate to inhibit corrosion of mild steel is demonstrated using laboratory and field test data. Initial evidence is also presented indicating that Molybdate inhibits the corrosion of copper and aluminium. Environmental aspects including fish toxicity data are discussed as is the likely mechanism of Molybdate inhibition.
Yu Zuo - One of the best experts on this subject based on the ideXlab platform.
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Inhibition of Q235 Carbon Steel by Calcium Lignosulfonate and Sodium Molybdate in Carbonated Concrete Pore Solution
Molecules, 2019Co-Authors: Bing Lin, Yu ZuoAbstract:The inhibition effect and mechanism of a compound calcium lignosulfonate (CLS) and Sodium Molybdate inhibitors for Q235 carbon steel in simulated carbonated concrete pore solution (pH 11.5) with 0.02 mol/L NaCl are studied using electrochemical and surface analysis techniques. The results show that in carbonated simulated concrete pore (SCP) solution CLS and Na2MoO4 show a synergistic inhibition effect. The compound inhibitor can be defined as mix-type inhibitor. With 400 ppm CLS plus 600 ppm Na2MoO4, the pitting potential moves positively about 200 mV, and the inhibition efficiency reaches 92.67%. After 24 h immersion, the IE% further increases up to 99.2%. The surface analysis results show that Na2MoO4 could promote stability of the passive film, and the insoluble molybdenum compounds and CaO/Ca(OH)2, together with adsorbed CLS, deposit on the steel surface, forming a complex film. The compounded film effectively inhibits corrosion of the steel.
Yanqi Wang - One of the best experts on this subject based on the ideXlab platform.
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inhibitive effect of Sodium Molybdate on the corrosion behavior of galvanized steel in simulated concrete pore solution
Construction and Building Materials, 2018Co-Authors: Yanqi Wang, Bo ZhangAbstract:Abstract To limit rapid dissolution of zinc and hydrogen evolution of zinc coating in fresh concrete environments at the early stage, the corrosion inhibition of Sodium Molybdate for galvanized steel in simulated concrete pore solutions with/without chloride ion addition was studied. The inhibitive effect of Sodium Molybdate was assessed by open circuit potential (OCP), potentiodynamic polarization test, polarization resistance measurement, scanning electron microscopy/energy dispersive spectrometry (SEM/EDS) and X-ray photoelectron spectroscopy (XPS) tests. The results showed that the formation of a Mo-containing film at the corroding interface occurred, which acted as a barrier effect to suppress the rapid dissolution and hydrogen evolution of the zinc layer in the high alkaline environments. Meanwhile, the presence of Sodium Molybdate also modified the formation and properties of the corrosion products formed on the sample surface.
Francisco Xavier Ribeiro Do Vale - One of the best experts on this subject based on the ideXlab platform.
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photosynthetic gas exchange in common bean submitted to foliar sprays of potassium silicate Sodium Molybdate and fungicide and infected with colletotrichum lindemuthianum
Journal of Phytopathology, 2015Co-Authors: Fabricio Avila Rodrigues, Leonora Rodriguez Polanco, Henrique Da Silva Silveira Duarte, Renata Sousa Resende, Francisco Xavier Ribeiro Do ValeAbstract:This study investigated whether foliar sprays of potassium silicate (KSi), Sodium Molybdate (NaMo) or a combination of both (KSi + NaMo), with or without the fungicide azoxystrobin (Azox), could reduce anthracnose symptoms, improve photosynthesis and increase yield. Two 2 × 4 factorial experiments, consisting of untreated or fungicide-treated plants sprayed with KSi, NaMo or KSi + NaMo were arranged in a randomized block design with three replications. The treatments were as follows: (i) KSi; (ii) NaMo; (iii) KSi + NaMo; (iv) Azox; (v) Azox + KSi; (vi) Azox + NaMo; (vii) Azox + KSi + NaMo; and (viii) control (no KSi, NaMo or Azox). The KSi, NaMo and Azox treatments were applied at the rates of 35 g/l, 90 g/ha and 120 g ai/ha, respectively. KSi was applied at 20, 27, 40 and 55 days after sowing (das). NaMo was applied only at 27 das, whereas the fungicide was applied at 27, 40 and 55 das. The plants were inoculated with Colletotrichum lindemuthianum at 23 das. The anthracnose severity was reduced by 64.25% and yield increase by 156.2% in plants sprayed with fungicide compared with non-sprayed ones. The KSi, NaMo and NaMo + KSi applications reduced anthracnose severity by 31.8, 16.1 and 37.9%, respectively, while the yield increased by 16.8, 18.9 and 63.9%, respectively. There was no difference between treated and non-treated plants with KSi with respect to the leaf gas exchange parameters Ci, E and gs. However, A significantly increased by 16.9% in plants treated with Azox. The A was not affected by KSi or NaMo spray; however, it was significantly increased by 12.5% after spraying with NaMo + KSi. In conclusion, bean plants treated with Si and Mo were associated with a decrease in anthracnose as well as an enhancement in photosynthesis activity under field conditions.
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management of anthracnose in common bean by foliar sprays of potassium silicate Sodium Molybdate and fungicide
Plant Disease, 2014Co-Authors: Leonora Rodriguez Polanco, Fabricio Avila Rodrigues, Henrique Da Silva Silveira Duarte, E N Moreira, Isaias Severino Cacique, L A Valente, R F Vieira, T J Paula, Francisco Xavier Ribeiro Do ValeAbstract:Polanco, L. R., Rodrigues, F. A., Moreira, E. N., Duarte, H. S. S., Cacique, I. S., Valente, L. A., Vieira, R. F., Paula Junior, T. J., and Vale, F. X. R. 2014. Management of anthracnose in common bean by foliar sprays of potassium silicate, Sodium Molybdate, and fungicide. Plant Dis. 98:84-89. This study aimed to determine whether foliar sprays of potassium silicate (KSi), Sodium Molybdate (NaMo), or a combination of both (KSi + NaMo), with or without the fungicide azoxystrobin (Azox), could reduce anthracnose symptoms and, consequently increase yield. Two two-by-four factorial experiments, consisting of untreated or fungicide treated, as well as sprays of KSi, NaMo, KSi + NaMo, and no spray (control), were arranged in a randomized block design with three replications. Treatments were as follows: treatment 1, KSi spray; treatment 2, NaMo spray; treatment 3, KSi + NaMo spray; treatment 4, Azox spray; treatment 5, Azox + KSi spray; treatment 6, Azox + NaMo spray, treatment 7, Azox + KSi + NaMo spray; and treatment 8, control (no KSi, NaMo, or Azox). The KSi, NaMo, and Azox treatments were sprayed at the rates of 35 g/liter, 90 g/ha, and 120 g a.i./ha, respectively. The KSi was applied at 20, 27, 40, and 55 days after sowing (das). The NaMo was sprayed only at 27 das whereas the fungicide was sprayed at 27, 40, and 55 das. Plants were inoculated with Colletotrichum lindemuthianum at 23 das. Azox reduced the mean area under disease progress curve (AUDPC) by 63% and mean yield was increased by 150%. Similarly, the mean AUDPC was reduced by 29, 14, and 41% with KSi, NaMo, and KSi + NaMo sprays, respectively, while mean yield increased by 13, 20, and 47%, with KSi, NaMo, or KSi + NaMo sprays, respectively. The variables leaf area index (LAI), leaf area index duration (LAD), healthy leaf area duration (HAD), and radiation intercepted (RI) were not affected by KSi spray. The values for the variables LAI, healthy leaf area index (HLAI), LAD, HAD, RI, intercepted radiation of the healthy leaf area, and healthy leaf area absorption were significantly increased as a result of NaMo spray. The results of the present study support the novel possibility of using a foliar spray of KSi in association with NaMo to decrease anthracnose symptoms in bean plants and, consequently, achieve greater yield.
