EP0754778A1 - Anticorrosive treatment process for braided cables and drive system - Google Patents

Anticorrosive treatment process for braided cables and drive system Download PDF

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Publication number
EP0754778A1
EP0754778A1 EP95938467A EP95938467A EP0754778A1 EP 0754778 A1 EP0754778 A1 EP 0754778A1 EP 95938467 A EP95938467 A EP 95938467A EP 95938467 A EP95938467 A EP 95938467A EP 0754778 A1 EP0754778 A1 EP 0754778A1
Authority
EP
European Patent Office
Prior art keywords
cable
procedure
stage
braided cables
anticorrosive treatment
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Withdrawn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
EP95938467A
Other languages
German (de)
English (en)
French (fr)
Inventor
Juan Reyes Fernandez
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.)
GALOL SA
Original Assignee
GALOL SA
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
Priority claimed from ES9402488A external-priority patent/ES2089976B1/es
Application filed by GALOL SA filed Critical GALOL SA
Publication of EP0754778A1 publication Critical patent/EP0754778A1/en
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/02—Machine details; Auxiliary devices
    • D07B7/12—Machine details; Auxiliary devices for softening, lubricating or impregnating ropes, cables, or component strands thereof
    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
    • D07B1/141—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising liquid, pasty or powder agents, e.g. lubricants or anti-corrosive oils or greases
    • D07B1/142—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising liquid, pasty or powder agents, e.g. lubricants or anti-corrosive oils or greases for ropes or rope components built-up from fibrous or filamentary material

Definitions

  • This invention refers to a new procedure for the treatment of braided cables, of the kind that have a layer of zinc, however thin this may be, converting this into a rustproofing barrier without altering the mechanical properties of the cable, and a system for pulling the braided cable, which uses a variable-speed reduction motor for each pair of reels in each stage of the procedure.
  • the kind of braided cable normally used is based on threads of stainless steel. This cable is very thick after drawing, that is, when metal threads are drawn, the greater the number of threads, the smaller the final diameter of the cable, since it can be bent better, withstanding greater strains through friction between the braided threads.
  • This cable is ready for use after drawing, and though it has acceptable anticorrosive properties it can also be said that its mechanical properties are fairly deficient for working as window-winder in car doors, clutch cables etc., that is where there are minimum mechanical requirements such as traction, friction, twisting, compression, etc..
  • Stainless steel is thus a hard material, difficult to draw, that is, if the intention is to draw with very fine threads this is a delicate job since they will easily break through being so fragile. There is no ductility in the cable, and so it will be difficult to bend and withstand tensions.
  • Another cable used nowadays which improves mechanical qualities as compared with stainless steel cable, uses a galvanized or electrozinc coated steel as its base metal, which is subjected to a tinning treatment, normally by electro-deposition.
  • This tinned cable improves the rustproofing properties of the base metal, but even so does not comply with the requirements and requisites of certain sectors of the industry such as the automobile field.
  • Anticorrosive protection is still weak and depending on the type of zinc (galvanized or electrozinc coating), on its initial thickness before drawing, the maximum time it withstands corrosion in a salt fog chamber (ONS) in a trial with 5% sodium chloride according to DIN 50021, does not exceed 200 hours (corrosion of the iron or base metal).
  • This tinned cable thus involves an expensive and slow process since the electro-deposition stage is complex, and also needs installations for washing, neutralizing and cleaning, since the remains of the products used in this procedure are highly contaminating, and thus these materials require treatment before they can be dumped. This also involves part of the products used being lost in the neutralizing and cleaning of waste, therefore leading to two reasons for greater expense - the installations required and the wasted material.
  • One kind of cable also commonly used is the galvanized steel variety, which has no later treatment after drawing, only with residual zinc.
  • This cable is cheaper than the stainless steel or tinned cable kind, but it does not fulfil the requisites of the automobile industry either.
  • the maximum time the anticorrosive protection withstands corrosion in a salt fog chamber (ONS) in a trial with 5% sodium chloride according to DIN 50021 is between 24 and 72 hours (connection of the iron or base metal).
  • cables that are being used in the automobile sector, though not as widely as those already mentioned, are cables made of phosphated steel, without zinc and with a partially ferrous core of the cable. After the braiding operation these are phosphated, obtaining good mechanical properties but poor resistance to corrosion.
  • Plastified cables should not be made to work in harsh mechanical conditions since they become deplastified.
  • Another sort of cable used in the automobile sector but without anticorrosive properties is a copper or tinned cable used in tyres.
  • the braided cable produced solves the disadvantages stated above at an economic price without the need for complex or contaminating installations.
  • This treatment is based on the transformation of the zinc layer on a wire, although this coating is very scarce, with transformation of the zinc remaining after steel drawing, without the deposition of another metal, organic or synthetic resin, varnishes, etc., one obtains a final product with a high degree of resistance to corrosion and without substantial variations of the mechanical performance, in a final phase of the procedure by means of special lubrication.
  • the coat of chrome-silicon produced on top of the zinc layer creates a microcrystalline coat based on salts of zinc, iron, chrome and silicon, which to a large extent prevents the formation of corrosive rust on the base metal, even with large mechanical stresses in corrosive atmospheres.
  • This hard friction-resistant layer is migratory, which means that after being damaged, it has the property of partly recovering its anticorrosive properties through humidity, and is thus ideal for maintaining its anticorrosive characteristics over the cable's whole life.
  • the chromate stage can be carried out either with chrome 6 (Cr 6 ) or chrome 3 (Cr 3 ) depending on the degree of rustproofing wished for, since Cr 6 under the same corrosion conditions gives a longer life than the cable treated with Cr 3 . Nevertheless, there are companies which will not accept pieces with Cr 6 on their mechanisms, and therefore this procedure allows either of the two possibilities to be used in the treatment.
  • this can be given a lubrication stage based preferably on molybdenum sulphide or another organic or synthetic lubricant.
  • the cable (8) goes through the process, from one stage to another, by means of a pulling system based on the use of a motor, preferably electric, which is independent for each stage of the process.
  • a motor preferably electric
  • These motors turn at the beginning at the same speed, so that there is not such a high tension in the cable from the end of the process, this tension increasing as the process lengthens.
  • This pulling system is fitted with a speed regulating device for each motor, so that if one reel of cable were to become too taut or through a fault this means the motor would accelerate enough to even up tensions on the cable and resume the rated working turning speed.
  • This regulating device consists of a counterweight on the cable, a lever arm with connecting rod/handle, a preferably analogical detector, a preferably vertical type speed variator regulator and the motor itself.
  • This process has a series of stages such as degreasing, in whose container (1) there is a detergent or similar (10); a drainer (11) at the exit from the former, and the cable then goes on to a second container (3) for neutralizing and then a chromate bath (4) with a further draining (12) and drying stage (13) finally going to a sealing process (13) and a further draining (14) and drying (15).
  • these cylinders (6) are preferably hollow for weight reasons, and have a slot (7) through which the cable goes (8).
  • These cylinders or reels (6) turn on two easily dismounted support pieces (19) each, which through a stub (20) form the point for linkage and support with the graphited teflon bearings (17) which can give a certain amount of tilt in their housing (21) to the bodies (16) joined at the top to all the bodies of the remaining cylinders, so that by lifting this structure all the cylinders can be lifted (6) to be changed, cleaned, have new cable put on etc..
  • the cable coming from a reel is submerged in a container (1) where there is a double cylinder (6) on which the cable (8) is wound, this being under the level of a degreasing liquid (10) so that this cable (8) is cleaned of all the dirt it may be carrying.
  • the fluid used (10) may be any of the ones commonly used for this end, and does not require any particular type, with an optimum temperature for this degreaser being between room temperature and 90°C, with a time between 30 and 180 seconds.
  • the degreasing will be done with neutral emulsives, detergents or preferably by slightly alkaline degreasers. This stage can be done by immersion in the tank (1), whilst wound on the drum (6) or alternatively through projecting these fluids onto the cable (8) as a process prior to or instead of degreasing through detergents.
  • the cable goes on its way, leaving the first stage (1) and being drained (11) by blowing, by absorption or by any known method etc., then going on through elements which keep it taut, guided at all times by means of pulleys (9), rollers etc.. It then reaches a second washing container (2) where it is rinsed to remove any possible remains of dirt or degreasing agent from the previous stage.
  • This second washing stage can be replaced by a fine shower or spray which would obtain the same results, but eliminating one container (2) with its corresponding cylinder (6).
  • the residues from this washing stage are biodegradable so that this is not a source of contamination.
  • the following neutralizing stage (3) makes sure that there are no traces of degreasant left, using any fluid with this function for this purpose.
  • neutralizing materials can be dilute acids such as nitric, hydrochloric, sulphuric acids etc., or acid salts of the right concentration and nature.
  • This bath or treatment is preferably done with chrome 3 (Cr +3 ) or chrome 6 (Cr +6 ) depending on the characteristics required.
  • Chrome 6 gives considerably greater resistance to corrosion than that provided by a chrome 3 coating, but there are nevertheless companies which do not allow chrome 6 on their mechanisms, and thus the possibility of using either of the two compounds is taken into consideration.
  • the temperature should be between room temperature and 40°C, with proportions of chrome 6 of from 1 to 10 g./litre and a pH of 1 to 2.5 with a time for this stage of 10 to 120 seconds.
  • the cable is drained (12) in a process identical to the previous draining (11) at the exit of the degreasing stage (1). After draining it goes on to a drying stage (13) where the damp that could be present on the cable after these baths is almost instantaneously eliminated by means of heating with air blast or preferably by induction.
  • the following stage is the sealing (5) where the cable wound onto the double slotted cylinder (6) is inserted into a hot water solution between 60 and 80°C of silicate compound, which reacts with the chromate layer in an alkaline medium and to concentrations between 10 and 50 g/litre and pH between 10.5 and 12, forming a complex of zinc chromate and silicon (SO 2 ) which make up the definitive anticorrosive layer when dry in the next stage.
  • the time taken for this stage varies from 20 to 240 seconds.
  • chrome-silicon remains in the treatment, there being no waste or contamination and so it is not necessary to have expensive installations for this purpose, as chrome is highly contaminating.
  • the last step in the procedure consists of draining (12) and drying (13) of similar characteristics to the tanks in the previous step (12 and 13).
  • This anticorrosive layer is formed by a microcrystalline layer based on zinc, iron, chrome and silicon which to a large extent prevents the formation of corrosive rust on the base metal even with large mechanical stresses in corrosive atmospheres.
  • a lubrication stage is advisable or not. If the cable has to withstand abrasion in its work or friction through twisting of the cable, either thread against thread, against pulleys, guides etc., then this last lubrication stage should be included.
  • the cable would go on to a following tank (18) in which the oil would be applied by aspersion or immersion with the temperatures and for the times according to its function, then collecting the oil not impregnated.
  • This lubricant could preferably be molybdenum sulphide although others could be used, either organic or synthetic types suitable for these functions.
  • a compatible colouring agent of aniline type could optionally be added, also in the silicon solution, which would result in a slight dying in any colour or shade which would identify the process, blue, green or red being the most suitable. This colour does not affect the chemical reaction or the final results.
  • the cable After all this treatment, the cable would be coiled again after treatment for its marketing and use.
  • the speed of the cable's movement through the process in a continuous procedure would normally be constant, the time it stays in each bath or stage depending on the number of turns that the cable is wound around the drum (6) in each stage.
  • the speed of this pull would be adjustable and conditioned by each particular case, depending on the base metal, anticorrosive coating required and diameter of the cylinders.
  • the drawings show the reels (6) which are normally inside the bath in the tank.
  • the cable (8) is wound around these reels the number of turns proportional to the length of stay in each bath.
  • the reels (6) are secured to a structure that is vertically moveable for inserting or removing the reels into or from the relevant bath.
  • the cable comes out tangentially towards a drainer (22), a pulley (23), on whose cable a further pulley (24) rests, with a counterweight (25), a lever arm (26) joined to a bar (27) which acts as a connecting rod/handle with the rod or arm (28), on top of which there is a detector (29) for sensing changes in distance which sends a signal to the motor (30) which drives the reels.
  • the system has a very simple operation, which works as follows: when the process starts all the motors (30) are switched on at the same time, at the beginning all turning at the same time so that the cable (8) is synchronized in each of the stages.
  • This movement gives rise to a slight tug on the cable which unwinds from its reel for treatment.
  • This cable (8) is wound round the coils of the reels (6) in the corresponding bath.
  • the cable (8) comes off the top reel tangentially and heads towards the tube (22) inside which an air draught is blasted onto the cable, making any liquid held on it fall into the same tank from which it started.
  • This pulley (23) could be any detector of the tautness of the cable (8) at this point.
  • Said tension detector (24) is linked with an arm (26) linked in turn to a bar (27) which can turn on its axis.
  • This arm (26) can have a counterweight (25) fitted to regulate the required tautness of the cable.
  • the tension detector (24) When for any reason the cable (8) becomes slack, the tension detector (24) will move, in this case downwards, through the effect of the counterweight (25) causing a turn of the connecting rod handle (9, 10) making the rod or handle device (28) turn, so that there is a variation in the relative position of its surface (31) in respect of the (preferably analogical) detector (29), sending a signal to the motor (30) for tension reduction, which results in a reduction of its turning speed, until the tension in the cable becomes correct again; the pulley (24) goes up giving rise to a turning torque on the arm (26), the bar (27) and the handle (28) so resulting in the same relative position with the detector (29) cutting out the signal which it sent for tension reduction to the motor (30), this then turning again at the original speed.
  • This device should be fitted for each set of reels used for each stage or bath in the process.
  • This treatment is suitable (and also multiplies the anticorrosive effect) for application on drawn wires with electrodeposition of zinc alloys, such as zinc-iron, zinc-nickel, etc..
  • This treatment is furthermore perfectly appropriate for discontinuous processes in which the hollow spools of drawn cable with residual zinc layer, galvanized or zinc treated are submerged in the different stages by means of transfer machines or similar, allowing the relevant chemical reactions which give the aforementioned anticorrosive properties.

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  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Ropes Or Cables (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Coating With Molten Metal (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
  • Electric Cable Installation (AREA)
EP95938467A 1994-12-03 1995-11-30 Anticorrosive treatment process for braided cables and drive system Withdrawn EP0754778A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
ES9402488A ES2089976B1 (es) 1994-12-03 1994-12-03 Procedimiento de tratamiento anticorrosivo para cables trenzados.
ES9402488 1994-12-03
ES009502310A ES2125155B1 (es) 1994-12-03 1995-11-23 Mejoras introducidas a la patente n-9402488 po "procedimiento de tratamiento anticorrosivo para cables trenzados.
ES9502310 1995-11-23
PCT/ES1995/000142 WO1996017978A1 (es) 1994-12-03 1995-11-30 Procedimiento de tratamiento anticorrosivo para cables trenzados y sistema de arrastre

Publications (1)

Publication Number Publication Date
EP0754778A1 true EP0754778A1 (en) 1997-01-22

Family

ID=26154840

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95938467A Withdrawn EP0754778A1 (en) 1994-12-03 1995-11-30 Anticorrosive treatment process for braided cables and drive system

Country Status (19)

Country Link
EP (1) EP0754778A1 (pt)
JP (1) JPH09509223A (pt)
CN (1) CN1143395A (pt)
AT (1) AT404738B (pt)
AU (1) AU709945B2 (pt)
BR (1) BR9506703A (pt)
CA (1) CA2182567A1 (pt)
CZ (1) CZ223396A3 (pt)
DE (1) DE19581498T1 (pt)
DK (1) DK82296A (pt)
ES (1) ES2125155B1 (pt)
FI (1) FI963019A (pt)
GB (1) GB2301378B (pt)
NO (1) NO963098L (pt)
PL (1) PL315781A1 (pt)
RU (1) RU2142022C1 (pt)
SE (1) SE9602848L (pt)
SK (1) SK101096A3 (pt)
WO (1) WO1996017978A1 (pt)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110369353A (zh) * 2019-07-19 2019-10-25 安徽电缆股份有限公司 一种绝缘电力电缆生产用清洗装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988884A (en) * 1974-10-10 1976-11-02 Shigeharu Kikugawa Method of making a wire rope
DE3151115A1 (de) * 1980-12-24 1982-09-02 Nippon Kokan K.K., Tokyo "mit einer ueberzugszusammensetzung versehene stahlbleche mit guter korrosionsbestaendigkeit, anstreichbarkeit und korrosionsbestaendigkeit nach dem aufbringen des ueberzugs"
JPS60149786A (ja) * 1984-01-17 1985-08-07 Kawasaki Steel Corp 耐食性に優れた亜鉛系合金電気めつき鋼板の表面処理方法
GB8529782D0 (en) * 1985-12-03 1986-01-08 Orchard O J Paying off fine material & fibres under constant tension
JP2645837B2 (ja) * 1987-10-14 1997-08-25 大阪府 ワイヤーロープの表面処理方法
WO1992005297A1 (en) * 1990-09-19 1992-04-02 Michigan Chrome And Chemical Company Corrosion resistant coated articles and process for making same
US5221879A (en) * 1990-09-21 1993-06-22 Bando Chemical Industries, Ltd. Method and apparatus for winding a cord continuously in dip treating apparatus
ES2046921B1 (es) * 1991-05-13 1994-09-01 Enthone Omi Inc Procedimiento de sellado de revestimientos de conversion de cromato sobre cinc electrodepositado.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9617978A1 *

Also Published As

Publication number Publication date
NO963098L (no) 1996-09-16
DE19581498T1 (de) 1997-02-27
WO1996017978A1 (es) 1996-06-13
AU709945B2 (en) 1999-09-09
DK82296A (da) 1996-07-30
JPH09509223A (ja) 1997-09-16
FI963019A0 (fi) 1996-07-31
GB9616349D0 (en) 1996-09-11
RU2142022C1 (ru) 1999-11-27
ES2125155B1 (es) 1999-11-16
PL315781A1 (en) 1996-12-09
CN1143395A (zh) 1997-02-19
BR9506703A (pt) 1997-09-16
ATA901495A (de) 1998-06-15
FI963019A (fi) 1996-07-31
SE9602848L (sv) 1996-09-05
AU3984195A (en) 1996-06-26
NO963098D0 (no) 1996-07-24
SE9602848D0 (sv) 1996-07-23
SK101096A3 (en) 1997-08-06
CZ223396A3 (en) 1996-12-11
MX9603160A (es) 1997-12-31
CA2182567A1 (en) 1996-06-13
ES2125155A1 (es) 1999-02-16
GB2301378B (en) 1998-12-30
AT404738B (de) 1999-02-25
GB2301378A (en) 1996-12-04

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