EP1407060A1 - Panier d'essorage chrome dur - Google Patents

Panier d'essorage chrome dur

Info

Publication number
EP1407060A1
EP1407060A1 EP02732304A EP02732304A EP1407060A1 EP 1407060 A1 EP1407060 A1 EP 1407060A1 EP 02732304 A EP02732304 A EP 02732304A EP 02732304 A EP02732304 A EP 02732304A EP 1407060 A1 EP1407060 A1 EP 1407060A1
Authority
EP
European Patent Office
Prior art keywords
layer
hard chrome
indicator
hard
element according
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.)
Granted
Application number
EP02732304A
Other languages
German (de)
English (en)
Other versions
EP1407060B1 (fr
Inventor
Walter Gisin
Michael Hekli
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.)
Hartchrom AG
Original Assignee
Hartchrom AG
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 Hartchrom AG filed Critical Hartchrom AG
Publication of EP1407060A1 publication Critical patent/EP1407060A1/fr
Application granted granted Critical
Publication of EP1407060B1 publication Critical patent/EP1407060B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/40—Coatings including alternating layers following a pattern, a periodic or defined repetition
    • C23C28/44—Coatings including alternating layers following a pattern, a periodic or defined repetition characterized by a measurable physical property of the alternating layer or system, e.g. thickness, density, hardness
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/027—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal matrix material comprising a mixture of at least two metals or metal phases or metal matrix composites, e.g. metal matrix with embedded inorganic hard particles, CERMET, MMC.
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D21D5/16—Cylinders and plates for screens

Definitions

  • the invention relates to a hard chrome-plated element, in particular a strainer basket, according to the preamble of claim 1.
  • elements for example those made of steel, are electroplated, in particular technically hard chrome-plated. It is possible to replace the hard chrome plating, that is to say to coat the element again, if part of the hard chrome plating has been removed.
  • stainless steel screen baskets are used, the surfaces of which are coated with a hard chrome layer to increase wear resistance. These baskets can also be re-coated.
  • the sieve baskets consist of a large number of rods with an essentially triangular cross section and thus have a large number of crests. The abrasion is at these tops strongest, so that the chrome layer is removed first.
  • the magnetic measuring methods usually used to determine the layer thickness on these tips fail, it is relatively difficult to determine the optimal time for a new coating. Re-layering too early increases costs and leads to unnecessary production interruptions. If the strainer basket is used for too long, the base material will also be removed from the top and the strainer basket will be irreparably damaged. In the second case, the damage is serious because these baskets are relatively expensive. A new hard chrome plating would only be one twentieth of the manufacturing costs.
  • DE-A-35 '33' 534 discloses a dental grinding tool made of steel, which has a metallic intermediate layer and a silver-white nickel outer layer.
  • the nickel outer layer is interspersed with diamonds or other granular abrasives.
  • DE-A-199 '09' 871 also shows a wear indicator for a material subject to wear.
  • This display layer consists of copper, nickel, chrome or precious metals.
  • This object is achieved by a hard chrome-plated element with the features of claim 1.
  • an indicator layer between a base material and the hard chrome layer of the element which differs optically, in particular in terms of color, from the hard chrome layer.
  • the indicator layer is applied directly to the base material.
  • an emergency running layer with increased wear resistance with the indicator layer itself forming this emergency running layer in a first variant.
  • a second hard throm layer is provided between the indicator layer and the base material.
  • This second hard chrome layer serves as an emergency running layer to protect the base material from abrasion until the new chrome plating.
  • a tension buffer bar is preferably present between the second hard chrome layer and the indicator layer, which compensates tensile stresses and thus prevents the indicator layer from cracking or flaking off.
  • Figure 1 is a schematic, not to scale representation of a layer structure of a hard chrome-plated screen basket according to the invention in a first embodiment
  • Figure 2 is a schematic representation of a second embodiment
  • Figure 3 is a schematic representation of a third embodiment.
  • FIG. 1 shows a first simple exemplary embodiment of a layer structure of a screen basket according to the invention.
  • the screen basket has a base body 1 made of a base material, preferably stainless steel.
  • An indicator layer 2 is applied to this base body 1.
  • the material of the indicator layer 2 preferably differs optically, in particular in terms of color, from the base material 1. Because of its low cost, copper is preferably used as the indicator layer 2.
  • copper is preferably used as the indicator layer 2.
  • other materials are also suitable, for example non-ferrous metals such as brass or bronze, gold, metal ceramics, metal oxides, conductive plastics, black chrome or black nickel.
  • the indicator layers can be formed from metal dispersions or electrochemical dispersion layers such as nickel or copper with micro-color capsules as the dispersant, or they can consist of CVD, PVD or thermal spray layers.
  • a hard chrome layer 3 is applied to the indicator layer 2, the indicator layer 2 being selected such that it differs from the hard chrome layer 3 optically, in particular in terms of color.
  • the indicator layer 2 stands out optically at these points and indicates that the strainer basket is to be chrome-plated again. If the indicator sheet 2 consists of a CVD or a PVD layer, the strainer basket does not have to be replaced immediately, since these layers have a relatively good wear resistance and thus, in the form of a so-called emergency running layer, guarantee wear protection, albeit for a short time. This means that a renovation of the strainer can be planned in peace.
  • FIG. 2 If the indicator sheet 2 is made of a different material, a structure as shown in FIG. 2 using a second, preferred exemplary embodiment is recommended. In addition, this structure enables a more economical variant than the use of the relatively expensive CVD and PVD layers.
  • the layers according to FIG. 1 are again provided with the same reference numbers.
  • a second hard chrome layer 4 which forms the emergency running layer, is now present between the base material 1 and the indicator layer 2.
  • This hard chrome layer 4 preferably has the same composition as the first hard chrome layer 3, but is considerably thinner. Typical values for a screen basket are 30 - 450 ⁇ m for the first hard chrome layer 3 and 25 - 30 ⁇ m for the second hard chrome layer 4.
  • the indicator layer 2 has an adhesion-promoting layer 5 present. This is particularly necessary when plastic is used as an indicator shoe 2.
  • the choice of material for the adhesion-promoting layer 5 depends on the type of indicator layer 2. For example, a nickel strike can be used as an adhesion promoter.
  • FIG. 3 shows a third, likewise preferred exemplary embodiment, which is particularly recommended when copper is used as indicator 2.
  • a tension buffer layer 6 is present between the adhesion-promoting layer 5 and the indicator layer 2, which absorbs shear forces.
  • the adhesion-promoting layer 5 again consists of a nickel strike and the voltage buffer layer 6 consists of galvanic nickel.
  • the adhesion-promoting layer 5 has a typical thickness of 20-60 ⁇ m and the voltage buffer layer 6 has a thickness greater than 20 ⁇ m.
  • the base body 1 is hard chrome-plated according to a known first method step using an inner anode. Then it is rinsed and the inner anode is dismantled. Next, an anode basket for nickel is installed and the hard chrome layer is activated in a hydrochloric acid solution. In an optional step, rinsing is carried out. Then the Niekel strike is applied and then the galvanic nickel layer. The anode basket for nickel is dismantled and an anode basket for copper is installed.
  • the screen basket is then copper-plated and the anode basket for copper is dismantled again in order to enable the assembly of a leaded steel anode, a lead anode or platinum-plated titanium anode for hard chrome plating. It is covered with an increased current density to avoid the influence of the copper layer to compensate for the electrical behavior.
  • the indicator can be applied by means of thermal spraying or tamponing.
  • the screen basket according to the invention enables the early detection of abrasions by using an indicator. If there is also an emergency running layer, the sieve basket can be prepared in peace.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Inorganic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

L'invention concerne un élément chromé dur, notamment un panier d'essorage chromé dur, composé d'un corps de base (1) en matériau de base, une surface du corps de base (1) étant pourvue d'une première couche de chrome dur< >(3). Une couche indicatrice (2) se différenciant optiquement de la première couche de chrome dur (3) est disposée entre la première couche de chrome dur (3) et le corps de base (1). L'élément chromé dur selon l'invention comporte de préférence une couche d'urgence présentant une résistance accrue à l'usure de manière à conserver suffisamment de temps pour la préparation d'un nouveau chromage de l'élément corrodé.
EP02732304A 2001-07-17 2002-06-10 Panier d'essorage chrome dur Expired - Lifetime EP1407060B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH131601 2001-07-17
CH13162001 2001-07-17
PCT/CH2002/000303 WO2003008667A1 (fr) 2001-07-17 2002-06-10 Panier d'essorage chrome dur

Publications (2)

Publication Number Publication Date
EP1407060A1 true EP1407060A1 (fr) 2004-04-14
EP1407060B1 EP1407060B1 (fr) 2009-04-29

Family

ID=4565373

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02732304A Expired - Lifetime EP1407060B1 (fr) 2001-07-17 2002-06-10 Panier d'essorage chrome dur

Country Status (5)

Country Link
US (1) US20040195158A1 (fr)
EP (1) EP1407060B1 (fr)
CA (1) CA2453299A1 (fr)
DE (1) DE50213503D1 (fr)
WO (1) WO2003008667A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011078655A1 (de) * 2011-07-05 2013-01-10 Voith Patent Gmbh Indikatorstab
FI124364B (fi) 2012-06-15 2014-07-15 Valmet Technologies Inc Sihtikorin kulutuksenkestävä pinnoite ja menetelmä pinnoitteen valmistamiseksi
EP3483319B1 (fr) * 2017-11-09 2021-12-22 Groz-Beckert KG Outil textile pourvu de couche indicatrice
CN109868395A (zh) * 2019-03-20 2019-06-11 安徽信息工程学院 一种高硬度材料及其制备方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425900A (en) * 1964-08-24 1969-02-04 Appleton Wire Works Corp Coated papermaking wire
US3459642A (en) * 1966-11-18 1969-08-05 Schafler Armando B Process for preparing a planographic plate
US3848744A (en) * 1972-12-04 1974-11-19 J Flaherty Green pellet sizing screen
US4563399A (en) * 1984-09-14 1986-01-07 Michael Ladney Chromium plating process and article produced
DE3533534A1 (de) * 1985-09-20 1987-04-02 Blendax Werke Schneider Co Zahnaerztliches schleifwerkzeug
DE19909871A1 (de) * 1999-03-08 2000-10-05 Fraunhofer Ges Forschung Verschleißanzeige
US6585116B1 (en) * 2000-02-22 2003-07-01 Voith Sulzer Paper Technology North America, Inc. Screening apparatus for fiber suspension

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03008667A1 *

Also Published As

Publication number Publication date
WO2003008667A1 (fr) 2003-01-30
EP1407060B1 (fr) 2009-04-29
DE50213503D1 (de) 2009-06-10
US20040195158A1 (en) 2004-10-07
CA2453299A1 (fr) 2003-01-30

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