Research Strategies to Develop Environmentally Friendly Marine Antifouling Coatings

Gu, Yunqing; Yu, Lingzhi; Mou, Jiegang; Wu, Denghao; Xu, Mingang; Zhou, Peijian; Ren, Yun

doi:10.3390/md18070371

Cited by 164 publications

(88 citation statements)

References 80 publications

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“…With the increase of the outlet angle and inlet angle, the optimal performance of the plastic Advances in Materials Science and Engineering centrifugal pump can be guaranteed. Of course, we can also adopt other methods, such as the development of an environment-friendly marine antifouling paint proposed by Gu et al [22], which can be used to reduce the wear of the plastic centrifugal pump.…”

Section: Experimental Verificationmentioning

confidence: 99%

The Influence of Blade Angle on the Performance of Plastic Centrifugal Pump

Tang

Zhang

2020

Advances in Materials Science and Engineering

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In order to obtain the influence of blade placement angle on the performance of plastic centrifugal pumps, this article used the velocity modulus method. Based on the method, the hydraulic design of the flow passage components of the plastic centrifugal pump was carried out, and the two-dimensional model and three-dimensional model diagram of the flow components were established. The flow field of the impeller model under different working conditions was simulated and the results were analyzed by ANSYS CFX. The influence of different fluid loads on the solid structure under design conditions on the structure characteristics of the impeller was studied by ANSYS Workbench. Impeller models with different outlet angles were established to study the influence of the outlet angle on the performance of pump, and fluid-structure interaction for different impeller models was utilized to study the influence of the outlet angle on the structural characteristics of the impeller. According to the Stepanoff velocity modulus method, considered the import prerotation, the wrap angle design method and the blade inlet angle design method were proposed. In order to study the influence of different inlet angles on the performance of pump, the inlet angle was changed to establish multiple sets of impeller models, 3D printing technology was used to print out each impeller, and performance experiments were performed on the pump equipped with the impeller. The result of the experiments showed that working pressure of plastic centrifugal pump exceeding 5 atm would cause impeller structure damage. When the outlet angle was 35°, the plastic centrifugal pump reached the highest efficiency of 81.0161% and the highest H of 35.8029. The maximum deformation caused by the flow field load on the impeller increased with the increase of the outlet angle. With the increase of the inlet angle, the efficiency and H of the plastic centrifugal pump were reduced. Under normal pressure load, the deformation of the impeller first decreased and then increased, and when β1 was 13°, the total deformation of the impeller was the smallest.

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Section: Experimental Verificationmentioning

confidence: 99%

The Influence of Blade Angle on the Performance of Plastic Centrifugal Pump

Tang

Zhang

2020

Advances in Materials Science and Engineering

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“…Natural compounds with antibiofilm activities generated from the metabolic mechanism of microorganisms can be an ideal substitute for the traditional chemical biocides, presenting environmentally friendly properties such as low toxicity and biodegradability. However, insufficient productivity and difficulty in synthesis limit the development of naturally synthesized compounds [ 14 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Discovery of Antibiofilm Activity of Elasnin against Marine Biofilms and Its Application in the Marine Antifouling Coatings

et al. 2021

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Biofilms are surface-attached multicellular communities that play critical roles in inducing biofouling and biocorrosion in the marine environment. Given the serious economic losses and problems caused by biofouling and biocorrosion, effective biofilm control strategies are highly sought after. In a screening program of antibiofilm compounds against marine biofilms, we discovered the potent biofilm inhibitory activity of elasnin. Elasnin effectively inhibited the biofilm formation of seven strains of bacteria isolated from marine biofilms. With high productivity, elasnin-based coatings were prepared in an easy and cost-effective way, which exhibited great performance in inhibiting the formation of multi-species biofilms and the attachment of large biofouling organisms in the marine environment. The 16S amplicon analysis and anti-larvae assay revealed that elasnin could prevent biofouling by the indirect impact of changed microbial composition of biofilms and direct inhibitory effect on larval settlement with low toxic effects. These findings indicated the potential application of elasnin in biofilm and biofouling control in the marine environment.

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“…The weight loss of specimens took place due to the synergism between oxygen reduction in the electrochemical process [17] and the metabolism activity of attached biofouling [4,8]. The electrochemical reaction is related to the synergic activity between anodic and cathodic area [46][47][48]. In addition, from the laboratory simulation, the average corrosion rate of steel was 4.1 mpy in seawater which was taken in Mandara Bali without the appearance of fouling on metal substrate [17].…”

Section: Corrosion Behavior Of Bare Steel Without Coating After Exposurementioning

confidence: 99%

“…In addition, the corrosion rate of bare mild steels took place predominantly due to the effect of DO and biofouling as well as the weight loss of them. Therefore, the presence of antifouling paint with multilayer system decreases the susceptibility of corrosion due to the resistance of corrosion ability in primer coating [48,49].…”

Section: Corrosion Behavior Of Bare Steel Without Coating After Exposurementioning

confidence: 99%

A Preliminary Field Study of Antifouling Paint Perfomance After Short Exposure in Mandara Bali, Indonesia

Priyotomo

Nuraini

Gunawan³

et al. 2021

IJE

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Antifouling paints are applied to prevent the growth of marine biofouling. In Indonesia, that paint is widely used for ship which commonly used copper-based biocide. In fact, there is no or little comprehesive studies on antifouling paint in Indonesia compared to other tropical countries. In this study, the evaluation of the performance for antifouling paint was carried out where anticorrosion paint and bare steel were also studied as references. The measurement of corrosion rate on steel was conducted by weight loss method. The panels containing specimens were exposure up to 1-month for immersion in different depth of sea up to 3 meters. Seawater parameters consisting of temperature, pH, salinity, conductivity and dissolved oxygen were measured as well as coating properties. The results showed both surfaces of anticorrosion paint and steel specimens covered by biofouling, but not on antifouling paint. There also is not much different in antifouling paint properties before and after exposure in various depth of sea. The reduction of thickness for antifouling paint is apparently predominant to be affected by sea current. The magnitude of corrosion rate on bare steel is almost the same in different depth of sea which took place due to the effect of dissolved oxygen and biofouling. In the future, the comparison of the paints perfomance all local regions is necessary to be conducted in all local regions of the Indonesia.

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Research Strategies to Develop Environmentally Friendly Marine Antifouling Coatings

Cited by 164 publications

References 80 publications

The Influence of Blade Angle on the Performance of Plastic Centrifugal Pump

The Influence of Blade Angle on the Performance of Plastic Centrifugal Pump

Discovery of Antibiofilm Activity of Elasnin against Marine Biofilms and Its Application in the Marine Antifouling Coatings

A Preliminary Field Study of Antifouling Paint Perfomance After Short Exposure in Mandara Bali, Indonesia

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