EP1730319A1 - Alliage metallique et utilisation d'alliages metalliques comme poids - Google Patents

Alliage metallique et utilisation d'alliages metalliques comme poids

Info

Publication number
EP1730319A1
EP1730319A1 EP05706815A EP05706815A EP1730319A1 EP 1730319 A1 EP1730319 A1 EP 1730319A1 EP 05706815 A EP05706815 A EP 05706815A EP 05706815 A EP05706815 A EP 05706815A EP 1730319 A1 EP1730319 A1 EP 1730319A1
Authority
EP
European Patent Office
Prior art keywords
metal alloy
maximum
constitutes
line
component
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.)
Withdrawn
Application number
EP05706815A
Other languages
German (de)
English (en)
Inventor
Danmark A/S Zab
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.)
Individual
Original Assignee
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 EP1730319A1 publication Critical patent/EP1730319A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C18/00—Alloys based on zinc
    • C22C18/04—Alloys based on zinc with aluminium as the next major constituent
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K75/00—Accessories for fishing nets; Details of fishing nets, e.g. structure
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K75/00—Accessories for fishing nets; Details of fishing nets, e.g. structure
    • A01K75/06—Sinkers
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/02—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2064—Cores characterised by their structure being discontinuous in the longitudinal direction
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2038—Agriculture, forestry and fishery

Definitions

  • the present invention relates to a metal alloy comprising at least a first main component Zn, which constitutes a minimum of 80% of said metal alloy, and a second com- ponent Al, which constitutes a maximum of 10% of said metal alloy,
  • the present invention furthermore relates to the use of the metal alloy as a weigh for wheel balancing, maritime equipment and to a sink line and a dragnet line using such weights.
  • weights have been made of lead mainly because it is cheap and easy to manufacture and corrosion resistant in seawater.
  • the weights are made in various sizes and shapes and are used to prevent fishing lines, hooks and nets from float- ing on the surface of the sea. The weights cause the lines, hooks and nets to remain below the water surface. The weights often drop to the bottom of the sea.
  • the danger of lead contamination of the water also exists due to lost weights. Fishermen frequently handle lead weights and their catch with lead contaminated hands or will eat hand-held food (sandwiches etc.) with lead contaminated hands.
  • lead fishing weights stored around the house, in basements or sheds are a health hazard to children who will find and play with them or put them into the mouth.
  • Lead fishing weights thus poses a tremendous environmental and health risk. It has thus been important to find some alternatives to lead weights.
  • a fishing weight is described.
  • the fishing weight is formed from a zinc alloy which is environmentally safe.
  • the type of alloy described and claimed in this patent has the drawback that it is not corrosion resistant when exposed to water and must thus be equipped with a protective coating covering its entire outer surface. Furthermore, this has the disadvantage that if the coating is damaged while in use, the zinc alloy will be exposed to water, leading to the adverse effect that the fishing weight will corrode due to the galvanic process between the zinc alloy and water.
  • DK 173 514 a zinc based alloy is described which may be used as a sacrificial anode.
  • US Military Standard U.S. -Mill - A -1800 K prescribes the addition of Cd in those zinc based alloys that are used as sacrificial anodes. Cd is, however, an extremely poisonous metal.
  • this zinc based alloy works as a sacrificial anode, and will thus corrode in sea water. Hence, it cannot be used as a fishing weight because it will gradually corrode.
  • This alloy has, however, the disadvantage that it will also be corroded in seawater due to the galvanic process between zinc and water.
  • a metal alloy comprising at least a first main component Zn, which constitutes a minimum of 8O% of said metal alloy, and a second component Al, which constitutes a maximum of 10% of said metal alloy, where said metal alloy furthermore comprises a third component Cu, which constitutes a minimum of 0.005% and a maximum of 1,000% of said metal alloy, a fourth component Si, which constitutes a maximum of 0.600% of said metal alloy, a fifth component Fe, which constitutes a minimum of 0.005% and a maximum of 0.200% of said metal alloy and a sixth component Ti, which constitutes a minimum of 0.000% and a maximum of 0.100% of said metal alloy, an alloy is achieved which is corrosion resistant in seawater.
  • Said metal alloy is manufactured from a so called spacer highgrade by adding Cu, Al,
  • a spacer highgrade must according to EURO-norm 1179:1995, ISO 7521981, Astm B6 - 87, contain max. 0.005% Cu, max. 0.003% Fe, max. 0.005% Cd, max. 0.005% Pb, max. 0.001% Sn and rest Zn.
  • Al and Cu strengthen the alloy, and Si acts as a binding agent, which ensures that the desired crystal structure is formed.
  • the metal alloy may furthermore comprise naturally occurring components such as a seventh component Pb, which constitutes a minimum of 0.005% and a maximum of 0.050% of said metal alloy, an eighth component Sn, which constitutes a minimum of 0.001% and a maximum of 0.050% of said metal alloy, and a ninth component Cd, which constitutes a minimum of 0.005% and a maximum of 0.070% of said metal alloy.
  • a seventh component Pb which constitutes a minimum of 0.005% and a maximum of 0.050% of said metal alloy
  • an eighth component Sn which constitutes a minimum of 0.001% and a maximum of 0.050% of said metal alloy
  • a ninth component Cd which constitutes a minimum of 0.005% and a maximum of 0.070% of said metal alloy.
  • a metal alloy according to the invention forms an outer protection layer of metal oxide and zinc carbonate.
  • said metal alloy is used as a fishing weight or in a sink line or dragnet line. Furthermore, due to the low corrosion rate (0.01 millimeter pr. year), such weights will have a long lifetime, which again will reduce the replacements costs of the fishing industry.
  • fishing weights are referred to as a possible usage of said metal alloy, but it is clear to anyone skilled in the art that said metal alloy may be used elsewhere.
  • a metal alloy according to the invention may have a voltage potential of less than the - 900 mN of a zinc based sacrificial anode.
  • the metals may be ordered in a so-called reactivity series where the metals are ordered according to their tendency to give up an electron
  • the reactivity series applies for electron transfer, which happens on the boundary sur- face between the metal and an aqueous solution.
  • the further to the left the metal is placed in the reactivity series the easier the metal gives up electrons.
  • Zn is placed further to the left than Fe and since Zn is a cheap metal, it is well suited as a sacrificial anode.
  • said metal alloy has a voltage potential of less than the -900 mV of a zinc based sacrificial anode, it will not work as an anode.
  • One of the consequences of this is that it will not corrode in seawater.
  • a metal alloy according to the invention may have an elongation at break of 30-70%, preferably of 40-60%), which at the moment is the percentage elongation of rupture of the alloy.
  • the wires made from said metal alloy may be braided into fishing lines or the like without danger of breakage.
  • the lines that may be used are for example sink lines. Such sink lines may be exposed to high stress without the danger of breaking the individual metal wires, which are braided into the line.
  • a metal alloy comprising at least a first main component Zn, which constitutes a minimum of 80% of said metal alloy, a second component Al, which constitutes a maximum of 10% of said metal alloy, a third component Cu, which con- stitutes a minimum of 0.005% and a maximum of 1,000% of said metal alloy, a fourth component Si, which constitutes a maximum of 0.600% of said metal alloy, a fifth component Fe, which constitutes a minimum of 0.005% and a maximum of 0.200% of said metal alloy and a sixth component Ti, which constitutes a minimum of 0.000% and a maximum of 0.100%) of said metal alloy, may be used as a weight for maritime equipment.
  • fouling lead-weights may be replaced with environmentally safe weights which further have the advantage of being non-corrodible. Additionally, such weights will have a longer lifetime than lead-weights.
  • Zn is a cheap metal with approximately the same price as lead and it is easy to work with.
  • said metal alloy may be pressure die cast or extruded, ⁇ vhich are cheap and effective manufacturing processes by which, it may be possible to produce for example fishing weights or plumb lines. Thus, it will be overall cost-neutral for the fishing industry to switch from using the fouling lead weights to the environmentally safer weights made from said metal alloy.
  • a weight made from said metal alloy will be stronger than lead, which is a rather soft material.
  • a weight made from said metal alloy will preserve its original shape, even if it is handled harshly, whereas a lead weight will be deformed by harsh handling such as thrusts or a blow.
  • a weight according to the present invention may be pressure die cast.
  • the pressure die casting may be automated. Furthermore, used weights may be re-cast again and again. This poses a tremendous advantage as compared to lead weights, which are mainly manufactured by hand casting, which is a more costly and time consuming manufactaring process than pressure casting.
  • pressure die casting of a weight may take as short time as a few seconds, which gives the possibility of producing weights in this way in large numbers and with substantially the same shape in a short time span.
  • a weight according to the invention may be provided with a number of openings or recesses adapted for receiving a line and where said weight is maintained at a specific position.
  • the weights may be attached to lines or wires, and that the weights may be fixed to some maritime equipment, as for example a diver's belt, fishing nets, trawl rings, sink lines or the like.
  • One way of attaching the weight to a line is to attach the weight to a line in one of the openings/recesses and then either bend the weight or press the opening/recess, and thereby preventing the detachment of the line from the now closed opening/recess.
  • This will make it possible to hold for example fishing nets in a fixed position in the sea by attaching floaters to one end of the net and weights according to the invention to the other end, thus stretching out the net and thereby increasing its efficiency.
  • said weight may be an extruded plumb line that is provided with a number of perforations and or cuts.
  • a sink line for fishing tackle comprising a number of lines, which each is provided with a number of weights according to the invention, where said line comprises a flexible tube, which encloses said weights, it is achieved that weights made by pressure die casting and attached to a line may be fitted into the tube in the desired number.
  • a sink line according to the invention where said flexible tube is an extruded plastic sleeve, it is achieved that the flexible tube is easy to produce, by extruding a plastic tube around the weight of either an extruded plumb line or a number of weights attached to a line.
  • sink line where said sink line may comprise a braid line, wherein a number of said lines are interwoven
  • weight may be varied from 2.2 kg/meter to 500 kg/meter.
  • the weight/meter does not even have to be uniformly distributed along the sink line, but may be varied according to where and how it is used which will thus make it possible to make sink lines for a wide variety of purposes.
  • sink line where said sink line may comprise an outer flexible tube enclosing a number of said lines, and where said outer flexible tube preferably is an extruded plastic sleeve, it will be possible to make sink lines with a suitable weight pr. meter, which may be varied from 2.2 kg/meter to 500 kg/meter, by a simple manufacturing process where a number of sink lines are passed through an extruder where the outer flexible tube is produced.
  • a braided filament line is not needed because the other flexible tube consisting of several sink lines can be used as a sink line.
  • the attachment fins may be equipped with some holes such that a fishing net may be tied to it, or it may simply be sewed on the attachment fin.
  • a dragnet line for fishing tackle comprising a number of interweaved lines, which each may be provided with a number of weights according to the invention, where said line is an extruded plumb line
  • a tremendous advantage over traditional dragnet lines is achieved because the traditional dragnet lines contain lead wires. These lead wires may break when the dragnet line is exposed to high strain, due to the low elongation at break for lead. This poses a work hazard for the fishermen working with the line because splinters of lead may injure their hands or other parts of the body when the line is rolled onto a pulley after use.
  • This is avoided by using weights according to the invention because the elongation at break is approximately 30-70%, preferably 40-60%, which is much adequate as a dragnet line typically stretches max 25 % due to use.
  • FIG. 1 shows a drawing of a fishing net
  • FIG. 2 shows a view of a section of a sink line according to the present invention
  • FIG. 3 shows a view of a section of a sink line, according to the invention which sink line is partly braided into a multifilament braided line
  • FIG. 4 shows a view of a section of a multi-sink line according to the invention ac- cording to the invention
  • FIG. 5 shows a view of a section of a sink line according to the invention, comprising a flexible tube that encloses the weights,
  • FIG. 6 shows a cross sectional view of a sink line according to the invention comprising an extruded plastic sleeve that encloses a plurality of individual sink lines
  • FIG. 7 shows a cross sectional view of a sink line according to the invention comprising a flexible tube that encloses the weights, where the flexible tube is provided with an attachment fine.
  • FIG. 1 shows a drawing of a fishing net 1, which at the top is equipped with a floating line 2 and at the bottom equipped with a sink line 3. These two lines 2,3 are essential in order to keep the fishing net 1 stretched out in the water.
  • the amount of weight necessary in the sink line 3 may depend on the kind of fishing net 1 used and stream conditions at the place the fishing net 1 is used.
  • Fig. 2 shows a view of a section of a sink line 3 according to the invention which is equipped with a number of weights 4, of which only four are shown. However, it should be apparent to anyone skilled in the art that the number, shape and relative distance between the individual weights 4 may be different than depicted in Fig. 2.
  • the weights 4 can be extruded onto the line 20 because it is a fast and cheap process, however, it may also be possible to attach pressure die cast weights 4 to the line 20.
  • the weights 4 may be extruded onto the line 20 uniformly (as shown), or they may be extruded onto the line 20 unevenly so that the sink line 3 will have a greater weight pr. meter in some places than in others.
  • Fig. 3 shows a view of a section of a sink line 3 that is partly braided into a multifilament braided line 5.
  • a multifilament braided line 5 with the weights 4 may be used as a plumb line in itself and be attached to for example a fishing net 1 (not shown).
  • a fishing net 1 not shown.
  • Fig. 4 shows an array of individual lines 20 with weights 4 attached to it which lines 20 are braided into a multifilament braided line 5.
  • the number of sink lines 3 used determines the weight of the multifilament braided lines 5, and this way the weight of the multifilament braided line 5 may be varied from as little as 2.2 kg/pr. 100 meter to as much as 100 kg/pr. 100 meter.
  • Fig. 5 shows a view of a section of a sink line 80 according to the invention, comprising a flexible tube 7 that encloses the weights 4.
  • the flexible tube 7 may be an extruded plastic sleeve, and it may also be braided into a multifilament braided line 5. This arrangement may give a better protection of the weights 4 itself.
  • the individual weights 4 are equipped with recesses 50 or protrusions which may break so that the multifilament braided line 5 will be more flexible.
  • Fig. 6 shows a cross sectional view of a sink line 70 according to the invention comprising an extruded plastic sleeve 8 that encloses a plurality of individual sink lines 3 with weights (not shown). The number of lines 3 with weights (not shown) that are enclosed in this way may be varied according to the individual need of a particular customer.
  • Fig. 7 shows a cross sectional view of a sink line 71 according to the invention comprising an extruded plastic sleeve 8 that encloses the weights (not shown), and where an attachment fin 9 is attached to the sleeve 8.
  • the attachment fin 9 may be manufactured from plastic, nylon or another suitable material.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Prevention Of Electric Corrosion (AREA)

Abstract

La présente invention concerne un alliage métallique comprenant au moins un premier composant Zn principal constituant 80 % minimum de cet alliage métallique, et un deuxième composant Al constituant 10 % maximum de cet alliage métallique, cet alliage métallique a un taux de corrosion maximum de 0,02 millimètre par an, de préférence de 0,01 millimètre par an. La présente invention concerne également l'utilisation de cet alliage métallique comme un poids pour un équipement maritime, et une ligne de fond et un filet traînant utilisant de tels poids.
EP05706815A 2004-03-12 2005-03-09 Alliage metallique et utilisation d'alliages metalliques comme poids Withdrawn EP1730319A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DKPA200400401 2004-03-12
DKPA200401443 2004-09-23
PCT/DK2005/000154 WO2005087961A1 (fr) 2004-03-12 2005-03-09 Alliage metallique et utilisation d'alliages metalliques comme poids

Publications (1)

Publication Number Publication Date
EP1730319A1 true EP1730319A1 (fr) 2006-12-13

Family

ID=34975599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05706815A Withdrawn EP1730319A1 (fr) 2004-03-12 2005-03-09 Alliage metallique et utilisation d'alliages metalliques comme poids

Country Status (2)

Country Link
EP (1) EP1730319A1 (fr)
WO (1) WO2005087961A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2328197A1 (es) * 2007-01-12 2009-11-10 Real Federacion Española De Caza Nuevas aplicaciones de materiales ecologicos tipo ods en pesca, automocion y otras actividades.
WO2008148946A1 (fr) * 2007-06-08 2008-12-11 Coppin Francois Dispositif de lestage pour filet de pèche
IT1398524B1 (it) * 2010-02-24 2013-03-01 Gimac Di Maccagnan Giorgio Elemento di zavorra impiegabile come corpo affondante per reti da pesca e similari.
ITMI20100910A1 (it) * 2010-05-20 2011-11-21 Pennacchio Di Pennacchio Gian Paolo & C S N C Elemento di zavorra lungiforme e relativo processo di produzione

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5648121A (en) * 1993-07-01 1997-07-15 Cornell, Jr.; Thomas W. Fishing weight
DK173514B1 (da) * 1998-11-03 2001-01-22 Bac Corrosion Control As Zinkbaseret legering, dens anvendelse som offeranode, offeranode samt fremgangsmåde til katodisk beskyttelse af korrosionst
DE10131344C1 (de) * 2001-06-28 2002-11-21 Grillo Werke Ag Zinklegierungen für den Zinkguss oder Zinkdruckguss und Verfahren zu deren Herstellung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005087961A1 *

Also Published As

Publication number Publication date
WO2005087961A1 (fr) 2005-09-22

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