US20080107560A1 - Alloy for use in galvanic protection - Google Patents

Alloy for use in galvanic protection Download PDF

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Publication number
US20080107560A1
US20080107560A1 US11/600,909 US60090906A US2008107560A1 US 20080107560 A1 US20080107560 A1 US 20080107560A1 US 60090906 A US60090906 A US 60090906A US 2008107560 A1 US2008107560 A1 US 2008107560A1
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US
United States
Prior art keywords
percent
anode
minus
plus
cathode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/600,909
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English (en)
Inventor
Brett Alexander Maddern
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MARINE PROTECTION SYSTEMS Pty Ltd
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Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of US20080107560A1 publication Critical patent/US20080107560A1/en
Assigned to MARINE PROTECTION SYSTEMS PTY LTD reassignment MARINE PROTECTION SYSTEMS PTY LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MADDERN, BRETT ALEXANDER
Abandoned legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/12—Electrodes characterised by the material
    • C23F13/14—Material for sacrificial anodes
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
    • C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
    • C23F2213/31—Immersed structures, e.g. submarine structures

Definitions

  • the present invention relates to an alloy used in the galvanic protection of non metallic water vessels.
  • the present invention seeks, therefore, among other things, to provide an alloy which overcomes some of the above mentioned disadvantages.
  • An alloy which comprises from 0.30 to 0.6 percent silicon plus or minus 5 percent, 0.1 to 0.30 percent iron plus Or minus 5 percent, 0.10 copper plus or minus 5 percent, 0.10 percent manganese plus or minus 5 percent, 0.35 to 0.6 percent magnesium plus or minus 5 percent, 0.05 percent chromium plus or minus 5 percent, 0.15 percent zinc plus or minus 5 percent, 0.10 percent titanium plus or minus 5 percent, 0.05 maximum individual trace metals plus or minus 5 percent, 0.15 percent total trace metals plus or minus 5 percent and the balance aluminium.
  • FIG. 1 is a schematic side elevation of an anode formed of the alloy of the present invention.
  • the metallic components of a water vessel with a non-metallic hull are protected by connecting the alloy of the present invention and the metallic components of the water vessel to form an electrochemical cell.
  • This electrochemical cell is created through the electrical connection of an anode formed of the alloy the present invention to a cathode which are the metallic components of a vessel.
  • the cathode and the anode are both located in a bridging medium. The connection of the anode and the cathode in this way allows for the passage of electrons from the anode to the cathode. These electrons are generated through oxidation of species at the anode and reduction of species at the cathode.
  • a galvanic protection system the physical integrity of the anode is sacrificed in order to maintain the physical integrity of the cathode.
  • the physical integrity of the anode is sacrificed through the dissolution of the anode into the bridging medium.
  • the suitability of the anode for galvanic protection is determined by the electrochemical potential of the anode compared to the cathode and the capacity of the anode to protect the cathode.
  • the alloy forming the anode has a chemical composition comprising 0.30 to 0.6 percent silicon plus or minus 5 percent, 0.1 to 0.30 percent iron plus or minus 5 percent, 0.10 copper plus or minus 5 percent, 0.10 percent manganese plus or minus 5 percent, 0.35 to 0.6 percent magnesium plus or minus 5 percent, 0.05 percent chromium plus or minus 5 percent, 0.15 percent zinc plus or minus 5 percent, 0.10 percent titanium plus or minus 5 percent, 0.05 maximum individual trace metals plus or minus 5 percent, 0.15 percent total trace metals plus or minus 5 percent with the balance being aluminum.
  • the anode formed of the alloy of the present invention has an electrochemical potential more negative than that of the cathode, preferably with an electrochemical potential in the range of ⁇ 500 to ⁇ 1200 mV, more preferably with an electrochemical potential in the range of ⁇ 500 to ⁇ 1100 mV.
  • the capacity of the anode to protect the cathode may be in the range of 1000 to 2000 Ah/kg, preferably in the range of 1400 to 1700 Ah/kg.
  • the surface area of the anode 10 shown in FIG. 1 is increased trough the incorporation of ridges 12 on the surface of the anode.
  • the surface area ratio of the anode to the cathode may be in the range of 1:1 to 1:20, preferably in the range of 1:2 to 1:20.
  • the electrical connection provides a passage for the flow of electrons between the cathode and the anode.
  • the electrical connection is preferably a metallic wire, more preferably a copper wire.
  • the bridging medium provides a passage for the flow of electrons between the anode and the cathode.
  • the bridging medium is preferably an aqueous solution, more preferably saltwater, particularly sea water.
  • seawater as a bridging medium may be replaced with another suitable aqueous liquid, preferably brackish water or fresh water.
  • the anode may be connected to the metallic components of the vessel using known techniques such as connecting the anode to the shaft gland/seal and, or shaft support bracket and, or the rudder and, or the trimtabs through a bonding buss bar/system via bonding wire.
  • the anode of the present invention is particularly envisaged for use with water vessels with fibreglass or wooden hulls.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Prevention Of Electric Corrosion (AREA)
US11/600,909 2006-11-03 2006-11-17 Alloy for use in galvanic protection Abandoned US20080107560A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2006235903 2006-11-03
AU2006235903A AU2006235903B2 (en) 2006-11-03 2006-11-03 Alloy for use in galvanic protection

Publications (1)

Publication Number Publication Date
US20080107560A1 true US20080107560A1 (en) 2008-05-08

Family

ID=37890999

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/600,909 Abandoned US20080107560A1 (en) 2006-11-03 2006-11-17 Alloy for use in galvanic protection

Country Status (7)

Country Link
US (1) US20080107560A1 (de)
EP (1) EP1918393B1 (de)
AT (1) ATE513933T1 (de)
AU (1) AU2006235903B2 (de)
CA (1) CA2567681A1 (de)
NO (1) NO20065162L (de)
NZ (1) NZ551262A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105256178A (zh) * 2015-10-29 2016-01-20 无锡市嘉邦电力管道厂 一种耐腐蚀铝合金及其制造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368952A (en) * 1964-05-18 1968-02-13 Olin Mathieson Alloy for cathodic protection galvanic anode
US3496620A (en) * 1966-11-07 1970-02-24 Olin Mathieson Composite aluminum article
US6602363B2 (en) * 1999-12-23 2003-08-05 Alcoa Inc. Aluminum alloy with intergranular corrosion resistance and methods of making and use

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4436553B2 (ja) * 2000-09-25 2010-03-24 株式会社ナカボーテック 低温海水環境流電陽極用アルミニウム合金
KR20050067605A (ko) * 2003-12-29 2005-07-05 주식회사 삼공사 유전양극용 알루미늄 합금

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368952A (en) * 1964-05-18 1968-02-13 Olin Mathieson Alloy for cathodic protection galvanic anode
US3496620A (en) * 1966-11-07 1970-02-24 Olin Mathieson Composite aluminum article
US6602363B2 (en) * 1999-12-23 2003-08-05 Alcoa Inc. Aluminum alloy with intergranular corrosion resistance and methods of making and use

Also Published As

Publication number Publication date
CA2567681A1 (en) 2008-05-03
NZ551262A (en) 2007-03-30
ATE513933T1 (de) 2011-07-15
AU2006235903A1 (en) 2008-05-22
NO20065162L (no) 2008-05-04
EP1918393A2 (de) 2008-05-07
AU2006235903B2 (en) 2011-03-03
EP1918393B1 (de) 2011-06-22
EP1918393A3 (de) 2009-01-28

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Legal Events

Date Code Title Description
AS Assignment

Owner name: MARINE PROTECTION SYSTEMS PTY LTD, AUSTRALIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MADDERN, BRETT ALEXANDER;REEL/FRAME:026229/0108

Effective date: 20101022

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION