Zwitterionic molecule layer for inhibiting microbial corrosion of copper alloy

2018 ◽  
Vol 65 (1) ◽  
pp. 46-52
Author(s):  
Fengling Xu ◽  
Zhenghui Qiu ◽  
Ri Qiu ◽  
Jiadong Yang ◽  
Cunguo Lin
Keyword(s):  
Electrochemical Impedance ◽  
Chemical Vapor ◽  
Attenuated Total Reflectance ◽  
Microbial Corrosion ◽  
Content Type ◽  
Sulfate Reducing ◽  
Angle Measurements ◽  
Static Contact ◽  
Contact Angle Measurements ◽  
Reducing Bacteria

Purpose For mitigating biocorrosion induced by sulfate-reducing bacteria (SRB) in seawater, the zwitterionic molecule layer (ZML) of poly (sulfobetaine methacrylate) is grafted onto B10 surface by chemical vapor deposition and surface-initiated atom transfer radical polymerization. Design/methodology/approach Energy-dispersive spectroscopy-attenuated total reflectance Fourier transform infrared spectroscopy and static contact angle measurements are used to characterize the as-formed layer. Findings After surface modification, B10 can significantly reduce SRB adhesion, demonstrating the good antifouling property. Further, the biocorrosion inhibition is investigated by potentiodynamic polarization and electrochemical impedance spectroscopy, indicating that ZML exhibits high resistance to biocorrosion with inhibition efficiency of approximately 90 per cent. Originality/value ZML performs a dual feature, i.e. antifouling film and corrosion inhibitor, for the biocorrosion inhibition.

Vertically aligned CNT arrays: structural integrity and surface properties

2016 ◽  
Vol 7 (6) ◽  
pp. 703-711 ◽  
Author(s):  
Dimitris K. Perivoliotis ◽  
Malamatenia A. Koklioti ◽  
Elias P. Koumoulos ◽  
Yiannis S. Raptis ◽  
Costas A. Charitidis
Keyword(s):  
Contact Angle ◽  
Structural Integrity ◽  
Mechanical Performance ◽  
Content Type ◽  
Cvd Method ◽  
Angle Measurements ◽  
Hydrophobic Behavior ◽  
Static Contact ◽  
Contact Angle Measurements ◽  
Cnt Arrays

Purpose Carbon nanotube-based architectures have increased the scientific interest owning to their exceptional performance rendering them promising candidates for advanced industrial applications in the nanotechnology field. Despite individual CNTs being considered as one of the most known strong materials, much less is known about other CNT forms, such as CNT arrays, in terms of their mechanical performance. The paper aims to discuss these issues. Design/methodology/approach In this work, thermal CVD method is employed to produce VA-MWCNT carpets. Their structural properties were studied by means of SEM, XRD and Raman spectroscopy, while their hydrophobic behavior was investigated via contact angle measurements. The resistance to indentation deformation of VA-MWCNT carpets was investigated through nanoindentation technique. Findings The synthesized VA-MWCNTs carpets consisted of well-aligned MWCNTs. Static contact angle measurements were performed with water and glycerol, revealing a rather super-hydrophobic behavior. Originality/value The structural analysis, hydrophobic behavior and indentation response of VA-MWCNTs carpets synthesized via CVD method are clearly demonstrated.

The exploration of the effective methods to evaluate the stripping ability of bacteriacide to SRB biofilm

2016 ◽  
Vol 63 (6) ◽  
pp. 445-451
Author(s):  
Yanan Wu ◽  
Hongfang Liu ◽  
Bijuan Zheng ◽  
Shuang Qin ◽  
Lei Chen
Keyword(s):  
Design Methodology ◽  
Electrochemical Impedance ◽  
Three Dimensional ◽  
Most Probable Number ◽  
Probable Number ◽  
Content Type ◽  
Sulfate Reducing ◽  
Effective Evaluation ◽  
Eis Measurements ◽  
Reducing Bacteria

Purpose The purpose of this paper was to study some effective evaluation methods for the biocide performance on sulfate-reducing bacteria (SRB) biofilm. Design/methodology/approach The most probable number method, electrochemical impedance spectroscopy (EIS) measurements, scanning electron microscopy (SEM), three-dimensional (3D) photos and epifluorescent microscopy were used in this study. Findings The results showed that the minimum inhibitory concentrations and minimum bactericidal concentrations of them to sessile SRB were greatly more than planktonic SRB. The EIS of the two biocides indicated that the biofilm exposed to higher concentrations of biocide were much more compact and flat, which perfectly coincided with the SEM, 3D photos and the epifluorescent microscopies. Originality/value In this paper, it, thus, appears that these methods evaluating biocide performance on the SRB biofilm were really effective by comparing the performance of bis-quaternary ammonium salt (BAQS) and tetrakis hydroxymethyl phosphonium sulfate.

Influence of sulfate reducing bacteria on the cupronickel corrosion

2014 ◽  
Vol 61 (6) ◽  
pp. 395-401
Author(s):  
Liu Kecheng ◽  
Liu Xia ◽  
Long Xiao ◽  
Wei Jiaqiang ◽  
Hu Mengsha ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Polarization Resistance ◽  
Corrosion Potential ◽  
Electrochemical Impedance ◽  
Sulfate Reducing Bacteria ◽  
Free Corrosion Potential ◽  
Content Type ◽  
Linear Polarization Resistance ◽  
Sulfate Reducing ◽  
Reducing Bacteria

Purpose – The purpose of this study is to explore the influence of the sulfate reducing bacteria (SRB) on the corrosion of cupronickel. Design/methodology/approach – Tests monitoring the change in free corrosion potential, linear polarization resistance and electrochemical impedance spectroscopy and examination using the scanning electron microscope and energy spectrum analysis were used to investigate the corrosion behavior of cupronickel in blank medium and in media inoculated with SRB to explore the influence of the SRB on the corrosion behavior of cupronickel alloy. Findings – The results show that SRB can destroy the surface oxide film of cupronickel and significantly reduce the free corrosion potential and polarization resistance of the cupronickel, causing the cupronickel to corrode significantly. Originality/value – SRB are widely found in the water supply system and is one of the important factors inducing microbial corrosion. This paper verified that SRB promote cupronickel corrosion and explored the influence and mechanism of attack.

Enhancement of corrosion resistance of mild steel in NaCl solution with an eco-friendly silane coating containing nanoclay and zinc acetylacetonate

2018 ◽  
Vol 47 (5) ◽  
pp. 424-430
Author(s):  
M. Taheri ◽  
Reza Naderi ◽  
Mohamad Mahdavian
Keyword(s):  
Mild Steel ◽  
Electrochemical Impedance ◽  
Sol Gel ◽  
Barrier Properties ◽  
Water Contact ◽  
Content Type ◽  
Angle Measurements ◽  
Silane Coating ◽  
Contact Angle Measurements ◽  
Zinc Acetylacetonate

Purpose This paper aims to enhance the barrier properties and active protection of a water-based silane coating on mild steel through nanoclay and zinc acetylacetonate simultaneously included into the formulation. Design/methodology/approach The corrosion protection performance of the silane sol-gel coatings with no additive, zinc acetylacetonate, nanoclay and nanoclay + zinc acetylacetonate was monitored using electrochemical impedance spectroscopy during 5 h of immersion in a sodium chloride solution. Moreover, the surface of coatings was analyzed using a field emission scanning electron microscopy equipped with an energy dispersive X-ray spectrometer (FESEM-EDX) and water contact angle measurements. Findings In electrochemical impedance spectroscopy analysis, the impedance at low frequencies, coating resistance and charge transfer resistance were the parameters considered which indicated the superiority of silane coating formulated with both nanoclay and zinc acetylacetonate. According to the results of FESEM/EDX and water contact angle measurements, the superiority was linked with the enhancement in the barrier properties in the presence of nanoclay, as well as function of the corrosion inhibitor at coating–substrate interface. Originality/value According to the literature, there is no research conducted to study the impact of the simultaneous use of nanoclay and zinc acetylacetonate on the barrier properties and active protection of an eco-friendly silane sol-gel coating including glycidyloxypropyltrimethoxysilane, tetraethoxysilane and methyltriethoxysilane on mild steel in a sodium chloride solution.

Corrosion Behavior of Low Nickel Alloy High Strength Steel in Seawater Containing Sulfate-Reducing Bacteria

2011 ◽  
Vol 368-373 ◽  
pp. 42-47
Author(s):  
Fu Shao Li ◽  
Mao Zhong An ◽  
Dong Xia Duan
Keyword(s):  
Nickel Alloy ◽  
High Strength Steel ◽  
Culture Medium ◽  
Electrochemical Impedance ◽  
High Strength ◽  
Sulfate Reducing Bacteria ◽  
Iron Sulfides ◽  
Active Dissolution ◽  
Sulfate Reducing ◽  
Reducing Bacteria

Corrosion behaviors of low nickel alloy high strength steel (LNAHSS) was studied by electrochemical impedance spectroscopy and scanning electron microscopy when the coupons of LNAHSS were exposed to the seawater culture media. As the results, LNAHSS was uniformly corroded in the fresh sterilized culture medium in a mode of active dissolution; in the culture medium with sulfate-reducing bacteria (SRB), LNAHSS was protected by the iron sulfides layer to some extent in the early stage of exposure, but severely localized corrosion subsequently occurred resulting from the localized breakdown of iron sulfides layer. So, in risks estimation, special precautions should be taken when LNAHSS serves in the environments containing SRB as the localized area can become the tress raiser.

scholarly journals Influence of plasma treatment on SiO2/Si and Si3N4/Si substrates for large-scale transfer of graphene

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
R. Lukose ◽  
M. Lisker ◽  
F. Akhtar ◽  
M. Fraschke ◽  
T. Grabolla ◽  
...  
Keyword(s):  
Large Scale ◽  
Oxygen Plasma ◽  
Chemical Vapor ◽  
Limiting Factors ◽  
Adhesion Properties ◽  
Si Substrates ◽  
Wetting Contact Angle ◽  
Angle Measurements ◽  
Chemical Vapor Deposited ◽  
Contact Angle Measurements

AbstractOne of the limiting factors of graphene integration into electronic, photonic, or sensing devices is the unavailability of large-scale graphene directly grown on the isolators. Therefore, it is necessary to transfer graphene from the donor growth wafers onto the isolating target wafers. In the present research, graphene was transferred from the chemical vapor deposited 200 mm Germanium/Silicon (Ge/Si) wafers onto isolating (SiO2/Si and Si3N4/Si) wafers by electrochemical delamination procedure, employing poly(methylmethacrylate) as an intermediate support layer. In order to influence the adhesion properties of graphene, the wettability properties of the target substrates were investigated in this study. To increase the adhesion of the graphene on the isolating surfaces, they were pre-treated with oxygen plasma prior the transfer process of graphene. The wetting contact angle measurements revealed the increase of the hydrophilicity after surface interaction with oxygen plasma, leading to improved adhesion of the graphene on 200 mm target wafers and possible proof-of-concept development of graphene-based devices in standard Si technologies.

scholarly journals Green biocide for mitigating sulfate-reducing bacteria influenced microbial corrosion

3 Biotech ◽  
2018 ◽  
Vol 8 (12) ◽  
Author(s):  
Shanthi Vaithiyanathan ◽  
Karthikeyan Chandrasekaran ◽  
R. C. Barik
Keyword(s):  
Sulfate Reducing Bacteria ◽  
Microbial Corrosion ◽  
Sulfate Reducing ◽  
Reducing Bacteria

Corrosion Behaviors of 0Cr18Ni9 Stainless Steel under the Combination Action of Sulfate-Reducing Bacteria and V.natriegens

2011 ◽  
Vol 356-360 ◽  
pp. 161-164
Author(s):  
Cai Xiang Gu ◽  
Xiao Ming Zhao ◽  
Yan Sheng Yin ◽  
Gui Jun Ji
Keyword(s):  
Stainless Steel ◽  
Corrosion Potential ◽  
Sea Water ◽  
Microbial Corrosion ◽  
Sulfate Reducing ◽  
Facultative Anaerobic ◽  
Corrosion Behaviors ◽  
Microbial Film ◽  
Combined Action ◽  
Reducing Bacteria

Advantage strains SRB and V.natriegens were obtained from the China East Sea for this study. Polarization curves, corrosion potential, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analyses were adopted in order to investigate the corrosion behaviors of 0Cr18Ni9 stainless steel under the combination action of anaerobic SRB and facultative anaerobic V.natriegens, The characteristics and mechanisms of microbial corrosion action in sea water were analyzed in this paper. The results show that SRB and V.natriegens promote each other’s growth when cultivated in the mixed microbe medium, in which the rate of corrosion is higher than that in the single microbe; Under the combined action of the mixed microbe, the microbial film gets wider and thicker, and corrosion products and metabolite are produced, which furthermore accelerates the passivation and pit corrosion to the 0Cr18Ni9 stainless steel.

scholarly journals Precise Static Contact Angle Measurements Using Pythagolas Rule

2014 ◽  
Vol 15 (2) ◽  
pp. 57-62
Author(s):  
Jin-Yeong Choi ◽  
Dong-Jun Kwon ◽  
Zuo-Jia Wang ◽  
Pyeong-Su Shin ◽  
Joung-Man Park
Keyword(s):  
Contact Angle ◽  
Static Contact Angle ◽  
Angle Measurements ◽  
Static Contact ◽  
Contact Angle Measurements

Improving wear resistance of aluminum by hydrophobic sol-gel-derived TiO2 film

2018 ◽  
Vol 70 (8) ◽  
pp. 1408-1413 ◽  
Author(s):  
Hongjin Zhao ◽  
Lei Cao ◽  
Yong Wan ◽  
Shuyan Yang ◽  
Jianguo Gao ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Stearic Acid ◽  
Design Methodology ◽  
Friction And Wear ◽  
Sol Gel ◽  
Industrial Applications ◽  
Content Type ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Increase Wear Resistance

Purpose The purpose of this paper is to increase wear resistance of aluminum. Design/methodology/approach The authors have studied the ways to improve the tribological performance of aluminum by assembling stearic acid on aluminum coated by sol-gel-derived TiO2 film. The samples were characterized by infrared spectroscopy, contact angle measurements and a macro friction and wear tester. Findings Enhanced wear resistance was clearly obtained after functionalization of TiO2 film on aluminum by stearic acid. Originality/value The relevant results might be helpful for guiding the surface modification of aluminum devices in industrial applications.

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