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| 1 | Insight into atmospheric corrosion evolution of mild steel in a simulated coastal atmosphere显示文摘The corrosion behavior of mild steel in a simulated coastal atmosphere environment has been investigated by the indoor accelerated wet/dry cyclic corrosion acceleration test(CCT),scanning electron microscopy(SEM),Raman spectroscopy and electrochemical measurements.During the CCT test of 60 cycles,the evolution of logarithmic(corrosion rate)vs.logarithmic(CCT cycles)presents a turning point at the 5th cycle,presenting a tendency to increase first and then decrease to gradually stabilize as the CCT cycle prolonged.Before the 5th cycle,γ-FeOOH andβ-FeOOH and Fe_(3)O_(4)were detected,respectively.And then,α-FeOOH as a new chemical composition was detected in the subsequent corrosion cycles.It is found that,after long term corrosion,the rust separated into a relatively dense inner layer rich withα-FeOOH and a loose outer layer rich withγ-FeOOH,both of which have poor electrical conductivity.The rapid increase of corrosion rate in the early stage since reducible corrosion products are involved in the reduction process of the cathode which promotes the dissolution of the anodic metal substrate.Afterward,as the rust layer thickens,the resistance of the rust increases,and the aggressive ions diffusion is blocked,gradually suppressing the electrochemical corrosion process.At last,when the composition and distribution of the rust layer remain stable,the corrosion presents a fluctuating speed around a certain value during the cracking and self-repairing process of the rust layer. | Yue Wang Xin Mu Junhua Dong Aniefiok Joseph Umoh Wei Ke | 2021 | Journal of Materials Science & Technology2021，，17： | 7 |
| 2 | Effect of glycine addition on the in-vitro corrosion behavior of AZ31 magnesium alloy in Hank’s solution显示文摘This study reports on the effect of the addition of Glycine to Hank’s solution on the in-vitro corrosion behavior of AZ31 magnesium(Mg)alloy at 37℃and a pH of 7.4 studied by using potentiodynamic polarization(PDP),hydrogen collecting techniques and electrochemical impedance spectroscopy(EIS)in combination with surface characterization techniques such as optical microscopy(OM),scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy analysis(XPS).The results reveal that adsorption of glycine initially subdues the dissolution of AZ31 Mg alloy while in long run it enhances the dissolution of the alloy due to the commencement of the chelation effect of glycine with Ca^(2+) released from hydroxyapatite.The chelation of glycine with Ca^(2+) induces the formation of cracks in the surface film which further promotes the dissolution of AZ31 Mg alloy thereby forming a porous corrosion products layer on the surface of the alloy.As a result,both the continuous dissolution of AZ31 magnesium alloy and the hydrogen evolution rate(HER)are enhanced with increasing the immersion time in Hank’s solution. | Durga Bhakta Pokharel Liping Wu Junhua Dong Amar Prasad Yadav Dhruba Babu Subedi Madhusudan Dhakal Lin Zha Xin Mu Aniefiok Joseph Umoh Wei Ke | 2021 | Journal of Materials Science & Technology2021，，22： | 4 |
| 3 | Effect of organic silicon quaternary ammonium salts on mitigating corrosion of reinforced steel induced by SRB in mild alkaline simulated concrete pore solution显示文摘The corrosion damage of 20 SiMn steel by sulphate-reducing bacteria(SRB)and the mitigation effect of organic silicon quaternary ammonium salt(OSA)were studied in sterilized mild alkaline simulated concrete pore solution(STR)with different additions of SRB and OSA at pH 9.35 for 28 days.Uniform corrosion occurs in STR medium while slight localized corrosion is observed in STR+OSA medium,and localized pitting corrosion occurs in STR+SRB and STR+SRB+OSA media.The largest pit depth reduces from 36.70μm in STR+SRB medium to 3.31μm in STR+SRB+OSA medium due to the mitigation effect of OSA.The corrosion rate reflected by weight loss and electrochemical impedance spectroscopy(EIS)results presents the order of STR | Ini-Ibehe Nabuk Etim Junhua Dong Jie Wei Chen Nan Durga Bhakt Pokharel Aniefiok Joseph Umoh Dake Xu Mingzhong Su Wei Ke | 2021 | Journal of Materials Science & Technology2021，，5： | 3 |
| 4 | Local cytokine profiles in knee osteoarthritis: elevated synovial fluid interleukin-15 differ- entiates early from end-stage disease显示文摘 | Scanzello C R Umoh E Pessler F | 2009 | Osteoarthritis Cartilage2009，17，8： | 1 |
| 5 | Activity of Alkaloid Extract of Carica papaya . Seeds on Reproductive Functions in Male Wistar Rats显示文摘 | F.V. Udoh P.B. Udoh E.E. Umoh | 2005 | Pharmaceutical Biology2005，，6： | 1 |
| 6 | A quality assurance phantom for the performance evaluation of volumetric micro-CT systems显示文摘 | Du LY Umoh J NikolovHN | 2007 | Physics in Medicine and Biology2007，52，23： | 1 |
| 7 | The effect of the interaction of various oil types with different culture media on biomass production of Psathyrella atroumbonata Pegler 显示文摘 | Nwanze PI Ameh JB Umoh VJ | 2005 | African Journal of Biotechnology2005，4，11： | 1 |
| 8 | Local cytokine profiles in knee osteoarthritis:elevated synovial fluid interleukin-15 differentiates early from end-stage disease显示文摘 | Scanzello CR Umoh E Pessler F | 2009 | Osteoarthritis and Cartilage2009，17，8： | 1 |
| 9 | The good,the bad,and the ugly with alcohol use and abuse on the heart 显示文摘 | Walker RK Cousins VM Umoh NA | 2013 | Alcohol Clin Exp Res2013，37，8： | 1 |
| 10 | Effect of D-fructose on the in-vitro corrosion behavior of AZ31 magnesium alloy in simulated body fluid显示文摘The effect of addingd-fructose to simulated body fluid(SBF) on the corrosion behavior of AZ31 magnesium(Mg) alloy at 37.C and at a pH of 7.4 was studied by potentiodynamic polarization(PDP), electrochemical impedance spectroscopy(EIS), potentiostatic polarization and hydrogen(H2) collecting techniques,Raman spectroscopy technique, scanning electron microscopy(SEM), energy dispersive spectroscopy(EDS), X-ray diffraction(XRD), X-ray photoelectron spectroscopy analysis(XPS) and Fourier transformed infrared(FTIR). The results demonstrated that the addition of fructose enhanced the deposition of phosphates forming thick and compact corrosion products, which inhibited the transmission of aggressive ions into the Mg substrate. As a result, both the anodic dissolution of Mg and negative difference effect(NDE) were suppressed. Thus, the corrosion resistance of AZ31 Mgalloy in SBF was significantly improved. | Durga Bhakta Pokharel Liping Wu Junhua Dong Xin Wei Ini-Ibehe Nabuk Etim Dhruba Babu Subedi Aniefiok Joseph Umoh Wei Ke | 2021 | Journal of Materials Science & Technology2021，，7： | 1 |
| 11 | Local cytokine profiles in knee osteoarthritis:elevated synovial fluid interleukin-15 differentiates early from end-stage disease显示文摘 | Scanzello C R Umoh E Pessler F | 2009 | Osteoarthritis Cartilage2009，17，8： | 1 |
| 12 | Local cytokine profiles in knee osteoarthritis:elevated synovial fluid in- terleukin-15 differentiates early from end-stage disease 显示文摘 | Scanzello CR Umoh E Pessler F | 2009 | Osteoarthritis Cartilage2009，17，8： | 1 |
| 13 | Occupational risk of infection by human immunodeficiency and hepatitis B viruses among health workers in south-eastern Nigeria显示文摘 | Ansa VO Udoma EJ Umoh MS | 2002 | East African Medical Journal2002，79，5： | 1 |
| 14 | The good, the bad, and the ugly with alcohol use and a- buse on the heart显示文摘 | Walker RK Cousins VM Umoh NA | 2013 | Alcohol Clin Exp Res2013，37，8： | 1 |
| 15 | Influence of climatic factors on rotavirus infection among children with acute gastroenteritis in Zaria, northern Nigeria显示文摘 | Gomwalk NE Umoh UJ Gosham LT | 1993 | J Trop Pediatr1993，39，5： | 1 |
| 16 | A quality assurance phan- tom for the performance evaluation of volumetric micro-CT systems显示文摘 | Du LY Umoh J Nikolov HN | 2007 | Phys Med Biol2007，52，： | 1 |
| 17 | Effect of heat and tetracyclinetreatments on the food quality and acridity factors in cocoyam 显示文摘 | Enomfon J Akpan I B Umoh | 2004 | Pakistan Journal of Nutrition2004，3，4： | 1 |
| 18 | Knowledge,attitude and practice about rabies among children receiving formal and informal education in Samaru,Zaria,Nigeria显示文摘 | DZIKWI AA IBRAHIM AS UMOH JU | 2012 | Glob J Health Sci2012，4，5： | 1 |
| 19 | Local cytoldne profiles in knee osteoarttis: elevated synovial fluid interleukin-15 differentiates early lom end-stage disease显示文摘 | Scanzelloy CR Umoh E Pessler F | 2009 | Osteoarthritis and Cartilage2009，17，8： | 1 |
| 20 | Local eytokine profiles in knee osteoarthritis: elevated synovial fluid interleukin-15 differentiates early from end-stage dis- ease显示文摘 | SCANZELLO C R UMOH E PESSLER F | 2009 | Osteoarthritis Cartilage2009，17，8： | 1 |
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