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Technology to prevent deposition of marine organisms by means of electrically conductive coating. Discussions on current and potential distribution by using experiments; Doden tomaku ni yoru kaiyo seibutsu fuchaku boshi gijutsu. Denryu den`i bunpu ni kansuru jikken ni yoru kento

Abstract

Steel structures in sea water and surface of hulls are deposited with such marine organisms as microorganisms, algae and shellfish. The deposition causes a large problem such as occurrence of abnormal local corrosion in the structures, and increase in cruising resistance in ocean vessels. The present study has introduced a simplified equation of estimation for current and potential distribution in parts coated with an electrically conductive film, and verified its reasonability by an experiment. The equation of estimation was introduced by following a model of current flow in the electrically conductive coating. The experiment has the conductive coating applied to the interior of a concrete water tank with a length of 10.8 m, a width of 5 m and a depth of 3 m to measure potential at different locations. The conductive coating was energized from copper foils attached on each applied face, whereas the current was applied to two faces between the conductive films as a pair among the four coating applied faces to measure potential in each location. A simulated calculation revealed that the potential range in the depth direction is made smaller if specific resistance of the conductive film is decreased, and made greater if increased. Effectiveness  More>>
Authors:
Usami, M; Masaki, T; [1]  Ueda, K
  1. Mitsubishi Heavy Industries, Ltd., Tokyo (Japan)
Publication Date:
Apr 10, 1996
Product Type:
Conference
Report Number:
CONF-9605248-
Reference Number:
SCA: 420204; 423000; 360105; PA: NEDO-96:913889; EDB-97:015814; SN: 97001718575
Resource Relation:
Conference: 92. Meeting of West Japan Society of Naval Architects, Seibu zosenkai dai 92 kai reikai, Yamaguchi (Japan), 9-10 May 1996; Other Information: PBD: 10 Apr 1996; Related Information: Is Part Of 92nd Meeting of West Japan Society of Naval Architects. Summary of papers; PB: 180 p.; Seibu zosenkai dai 92 kai reikai. Ronbun kogai
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 36 MATERIALS SCIENCE; ELECTRODEPOSITED COATINGS; SHIPS; MOTORBOATS; AQUATIC ORGANISMS; ELECTRIC CURRENTS; ELECTRIC POTENTIAL; ADHESION; MICROORGANISMS; ALGAE; CLAMS; ELECTRIC CONDUCTIVITY; COMPUTERIZED SIMULATION; CORROSION; MARITIME TRANSPORT; COPPER; FOILS
OSTI ID:
414192
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97721550; TRN: 96:913889
Availability:
Available from West Japan Society of Naval Architects, 10-1, Hakozaki 6-chome, Higashi-ku, Fukuoka, Fukuoka Prefecture, Japan; OSTI as DE97721550
Submitting Site:
NEDO
Size:
pp. 167-172
Announcement Date:

Citation Formats

Usami, M, Masaki, T, and Ueda, K. Technology to prevent deposition of marine organisms by means of electrically conductive coating. Discussions on current and potential distribution by using experiments; Doden tomaku ni yoru kaiyo seibutsu fuchaku boshi gijutsu. Denryu den`i bunpu ni kansuru jikken ni yoru kento. Japan: N. p., 1996. Web.
Usami, M, Masaki, T, & Ueda, K. Technology to prevent deposition of marine organisms by means of electrically conductive coating. Discussions on current and potential distribution by using experiments; Doden tomaku ni yoru kaiyo seibutsu fuchaku boshi gijutsu. Denryu den`i bunpu ni kansuru jikken ni yoru kento. Japan.
Usami, M, Masaki, T, and Ueda, K. 1996. "Technology to prevent deposition of marine organisms by means of electrically conductive coating. Discussions on current and potential distribution by using experiments; Doden tomaku ni yoru kaiyo seibutsu fuchaku boshi gijutsu. Denryu den`i bunpu ni kansuru jikken ni yoru kento." Japan.
@misc{etde_414192,
title = {Technology to prevent deposition of marine organisms by means of electrically conductive coating. Discussions on current and potential distribution by using experiments; Doden tomaku ni yoru kaiyo seibutsu fuchaku boshi gijutsu. Denryu den`i bunpu ni kansuru jikken ni yoru kento}
author = {Usami, M, Masaki, T, and Ueda, K}
abstractNote = {Steel structures in sea water and surface of hulls are deposited with such marine organisms as microorganisms, algae and shellfish. The deposition causes a large problem such as occurrence of abnormal local corrosion in the structures, and increase in cruising resistance in ocean vessels. The present study has introduced a simplified equation of estimation for current and potential distribution in parts coated with an electrically conductive film, and verified its reasonability by an experiment. The equation of estimation was introduced by following a model of current flow in the electrically conductive coating. The experiment has the conductive coating applied to the interior of a concrete water tank with a length of 10.8 m, a width of 5 m and a depth of 3 m to measure potential at different locations. The conductive coating was energized from copper foils attached on each applied face, whereas the current was applied to two faces between the conductive films as a pair among the four coating applied faces to measure potential in each location. A simulated calculation revealed that the potential range in the depth direction is made smaller if specific resistance of the conductive film is decreased, and made greater if increased. Effectiveness of the equation of estimation was verified by an experiment. This method has provided a prospect of achieving optimization of the specification for application of the conductive film. 2 refs., 7 figs.}
place = {Japan}
year = {1996}
month = {Apr}
}