Advanced Polymer Sorbents: Performance for Lower V/U Adsorption in Natural Seawater

2021 ◽  
Author(s):  
Sadananda Das ◽  
Zongyu Wang ◽  
Chris Janke ◽  
Richard T. Mayes ◽  
Gary Gill ◽  
...  
Keyword(s):  
Natural Seawater ◽  
Polymer Sorbents

TEM study of a biofilm on copper corrosion

1996 ◽  
Vol 54 ◽  
pp. 220-221
Author(s):  
W. A. Chiou ◽  
N. Kohyama ◽  
B. Little ◽  
P. Wagner ◽  
M. Meshii
Keyword(s):  
Marine Bacterium ◽  
Culture Medium ◽  
Copper Alloys ◽  
Pure Copper ◽  
Localized Corrosion ◽  
Natural Seawater ◽  
Copper Corrosion ◽  
New Approach ◽  
The Past ◽  
Copper Tolerant

The corrosion of copper and copper alloys in a marine environment is of great concern because of their widespread use in heat exchangers and steam condensers in which natural seawater is the coolant. It has become increasingly evident that microorganisms play an important role in the corrosion of a number of metals and alloys under a variety of environments. For the past 15 years the use of SEM has proven to be useful in studying biofilms and spatial relationships between bacteria and localized corrosion of metals. Little information, however, has been obtained using TEM capitalizing on its higher spacial resolution and the transmission observation of interfaces. The research presented herein is the first step of this new approach in studying the corrosion with biological influence in pure copper.Commercially produced copper (Cu, 99%) foils of approximately 120 μm thick exposed to a copper-tolerant marine bacterium, Oceanospirillum, and an abiotic culture medium were subsampled (1 cm × 1 cm) for this study along with unexposed control samples.

Commercial aqueous additives as used eco-friendly corrosion inhibitors for carbon steel in natural seawater

2020 ◽  
Vol 65 (1) ◽  
pp. 77-82
Author(s):  
Simona CAPRARESCU ◽  
◽  
Violeta PURCAR ◽  
Cristina MODROGAN ◽  
◽  
...  
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibitors ◽  
Natural Seawater

scholarly journals Does galvanic cathodic protection by aluminum anodes impact marine organisms?

2020 ◽  
Vol 32 (1) ◽  
Author(s):  
Anna Maria Bell ◽  
Marcus von der Au ◽  
Julia Regnery ◽  
Matthias Schmid ◽  
Björn Meermann ◽  
...  
Keyword(s):  
Marine Environment ◽  
Cathodic Protection ◽  
Algal Growth ◽  
Wind Farms ◽  
Marine Organisms ◽  
Offshore Wind ◽  
Natural Seawater ◽  
Corophium Volutator ◽  
Offshore Wind Farms ◽  
Ecotoxicological Effects

Abstract Background Cathodic protection by sacrificial anodes composed of aluminum-zinc-indium alloys is often applied to protect offshore support structures of wind turbines from corrosion. Given the considerable growth of renewable energies and thus offshore wind farms in Germany over the last decade, increasing levels of aluminum, indium and zinc are released to the marine environment. Although these metals are ecotoxicologically well-studied, data regarding their impact on marine organisms, especially sediment-dwelling species, as well as possible ecotoxicological effects of galvanic anodes are scarce. To investigate possible ecotoxicological effects to the marine environment, the diatom Phaedactylum tricornutum, the bacterium Aliivibrio fischeri and the amphipod Corophium volutator were exposed to dissolved galvanic anodes and solutions of aluminum and zinc, respectively, in standardized laboratory tests using natural seawater. In addition to acute toxicological effects, the uptake of these elements by C. volutator was investigated. Results The investigated anode material caused no acute toxicity to the tested bacteria and only weak but significant effects on algal growth. In case of the amphipods, the single elements Al and Zn showed significant effects only at the highest tested concentrations. Moreover, an accumulation of Al and In was observed in the crustacea species. Conclusions Overall, the findings of this study indicated no direct environmental impact on the tested marine organisms by the use of galvanic anodes for cathodic protection. However, the accumulation of metals in, e.g., crustaceans might enhance their trophic transfer within the marine food web.

Effects of natural seawater mixing on the properties of alkali-activated slag binders

2021 ◽  
Vol 294 ◽  
pp. 123601
Author(s):  
Jie Ren ◽  
Hongfang Sun ◽  
Kun Cao ◽  
Zhili Ren ◽  
Bo Zhou ◽  
...  
Keyword(s):  
Natural Seawater ◽  
Alkali Activated Slag ◽  
Activated Slag ◽  
Alkali Activated

Cyclic Copper Uptake and Release from Natural Seawater—A Fully Sustainable Antifouling Technique to Prevent Marine Growth

2020 ◽  
Vol 55 (1) ◽  
pp. 757-766
Author(s):  
Sait Elmas ◽  
Karuna Skipper ◽  
Nahideh Salehifar ◽  
Tamar Jamieson ◽  
Gunther G. Andersson ◽  
...  
Keyword(s):  
Natural Seawater ◽  
Copper Uptake ◽  
Uptake And Release

Photoinduced Multiple Effects to Enhance Uranium Extraction from Natural Seawater by Black Phosphorus Nanosheets

2019 ◽  
Vol 132 (3) ◽  
pp. 1236-1243 ◽  
Author(s):  
Yihui Yuan ◽  
Biye Niu ◽  
Qiuhan Yu ◽  
Xin Guo ◽  
Zhanhu Guo ◽  
...  
Keyword(s):  
Black Phosphorus ◽  
Natural Seawater ◽  
Uranium Extraction

Crevice Corrosion Studies on Corrosion Resistant Alloys in Stagnant Natural Seawater

2012 ◽  
Vol 610-613 ◽  
pp. 276-279
Author(s):  
Laura L. Machuca ◽  
Stuart I. Bailey ◽  
Rolf Gubner
Keyword(s):  
Crevice Corrosion ◽  
Corrosion Potential ◽  
Natural Seawater ◽  
Corrosion Resistant ◽  
Testing Procedures ◽  
Corrosion Studies ◽  
Long Term Performance ◽  
Term Performance ◽  
Positive Effect

Crevice corrosion (CC) was investigated for a number of selected corrosion resistant alloys in natural seawater containing microorganisms for up to 18 months under stagnant conditions. Experimental controls consisted of tests in natural seawater filtered in accordance with hydrostatic testing procedures. The corrosion potential of alloys was monitored throughout exposure and corrosion was evaluated by weight loss and 3D optical microscopy. CC was initiated on several alloys and corrosion rates in time indicated a positive effect of seawater filtration on the long-term performance of the alloys. Microbial adhesion, as indicated by fluorescence microscopy, occurred mainly outside the crevice and differed according to the nature of the substratum surface.

The mineral springs of the Scrajo spa (Sorrento peninsula, Italy): a case of “natural” seawater intrusion

2013 ◽  
Vol 72 (1) ◽  
pp. 147-156 ◽  
Author(s):  
A. Corniello ◽  
M. Trifuoggi ◽  
G. Ruggieri
Keyword(s):  
Seawater Intrusion ◽  
Natural Seawater ◽  
Mineral Springs ◽  
Sorrento Peninsula

Protection of Steel Piles by Selected Coatings in a Natural Seawater Environment

1979 ◽  
Vol 31 (08) ◽  
pp. 1035-1041
Author(s):  
E. Escalante ◽  
W.P. Iverson
Keyword(s):  
Natural Seawater ◽  
Steel Piles ◽  
Seawater Environment

Corrosion properties of nickel-aluminium bronze in natural seawater—Effect of galvanic coupling to UNS S31603

2017 ◽  
Vol 121 ◽  
pp. 43-56 ◽  
Author(s):  
Hedda Nordby Krogstad ◽  
Roy Johnsen
Keyword(s):  
Natural Seawater ◽  
Galvanic Coupling ◽  
Corrosion Properties ◽  
Aluminium Bronze
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