DE1521079A1 - Process for depositing shiny, micro-cracked chrome coatings by means of double chrome plating - Google Patents

Process for depositing shiny, micro-cracked chrome coatings by means of double chrome plating

Info

Publication number
DE1521079A1
DE1521079A1 DE19631521079 DE1521079A DE1521079A1 DE 1521079 A1 DE1521079 A1 DE 1521079A1 DE 19631521079 DE19631521079 DE 19631521079 DE 1521079 A DE1521079 A DE 1521079A DE 1521079 A1 DE1521079 A1 DE 1521079A1
Authority
DE
Germany
Prior art keywords
chrome
micro
cracked
double
chrome plating
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.)
Pending
Application number
DE19631521079
Other languages
German (de)
Inventor
Oswald Dauke
Theo Rose
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.)
Volkswagen AG
Original Assignee
Volkswagen 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 Volkswagen AG filed Critical Volkswagen AG
Publication of DE1521079A1 publication Critical patent/DE1521079A1/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/60—Electroplating characterised by the structure or texture of the layers
    • C25D5/625—Discontinuous layers, e.g. microcracked layers
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/10—Electroplating with more than one layer of the same or of different metals
    • C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
    • C25D5/14—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium two or more layers being of nickel or chromium, e.g. duplex or triplex layers
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/627—Electroplating characterised by the visual appearance of the layers, e.g. colour, brightness or mat appearance

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Description

Verfahren zum Abscheiden von glänzenden mikrorissigen Chromüberzügen mittels 2oppelverchromunlr Die vorliegende Erfindung betrifft ein Verchromungsverfa.hren, welches einen guten mikrorissigen Chromilberzug mit einfacher. Elektrolyten ergibt, Die Erfindung ermöglicht die Abscheidung glänzender, mikrorissiger Chromüberzüge aus einfachen, mischsauren Chromelektrolyten mittels Doppelverchromung. Die Überzugskombination Kupfer-Nickel- und mikrorissiges Chrom wird aufgrund seiner überlegenen Korrosionsbeständigkeit immer mehr in der industrieellen Elektroplattierung angewandt. Ein Nachteil sind dabei die teuren Spezialelektrolyte, um glänzende mikrorissige Chromübe--züge zu erzielen. . Neuheitsgemäß wird vorgeschlagen, die Ware in zwei misjhsaurer. Chromrädern mit unterschiedlichen Gehalten an Chromsäure, Scnxefelsäure una Kaiumsilikofluorid unmittelbar hintereinander nach dem Vornickein getaucht und in diesem verchrGmt wird, wobei @ as erste Bad aus 3J0 - 4.00 g/1 er03, 195 " 2,11, gli 1=2r8'104, @J,5 -, 2)0 tg@ll K2:RiFo besteht und die Verchromung mit einer wtromdiciite j,:D5a `'J bis 30 Ai`@idm rc. . @. lt _. z ü:'l:a:g? ., l#ra:z -#.# #.@, i.#, v0U? - #L#, C003 mm er- ,@tl@._ ,_. . z. "r=-1 te Br,u. sich atis 20UD -- 300 g/1 Vr0? , 120 - 290 g%1 uni= wi-;: derselben Strom- .!, t@;"a.`kt? 0-tVJI "' 0,002 mm @- @,, t@ y @ @@->ae e"--h -omelektrolyte auf das :;il .@W>.r mögl:i#ch uäid. das Verfahren zeichnet ich Chrombäder mit aii. te2sC@.#:i . ?@h:@tg@;areg@:, a,'e:fFLsäure und KalilLm- _t.17.,.t@ l @.,*.. `I w,. - wanti t können .,J'I@..:1.ix-@iric:c@z:.e fertig hochglana- c@e@lir,@t_:.y@s :@*[email protected]@;lt. ##,n b#Di.de:r3 lad@zä behandelt werden. Der j J# e 1=t,. ,tz- ein Mikrorißnetzwerk ?r a@'_ . -. ::xrx# 3,:*t.#YIMi linear gemessen. färf.w :'c' t der Chvomelektrolyte mit den Rar,@dsF:t>@:: OrO3,@?:°'y T und K2SiF6® 2> Konstante und sicahe:r Ariiei.tswei.; e der Elektrolyte ohne techn. Aufwand wie Preßluftumwälzung usw. Process for depositing shiny micro-cracked chrome coatings by means of double chrome plating. Electrolytes result, The invention enables the deposition of shiny, micro-cracked chrome coatings from simple, mixed acidic chrome electrolytes by means of double chrome plating. The coating combination of copper-nickel and micro-cracked chromium is used more and more in industrial electroplating due to its superior corrosion resistance. One disadvantage is the expensive special electrolytes to achieve shiny, micro-cracked chrome covers. . According to the novelty, it is proposed to divide the goods into two misjhsaurer. Chrome wheels with different contents of chromic acid, felic acid and potassium silicofluoride immediately one after the other after the fore-nod and chrome-plated in this, whereby the first bath of 3J0 - 4.00 g / 1 er03, 195 " 2.11, gli 1 = 2r8'104, @ J, 5 -, 2) 0 tg @ ll K2: RiFo consists and the chrome plating with a wtromdiciite j,: D5a `` J to 30 Ai` @ idm rc. . @. lt _. z ü: 'l: a: g? ., l # ra: z - #. # #. @, i. #, v0U? - # L #, C003 mm , @ tl @ ._, _. . z. "r = -1 th Br, u. atis 2 0 UD - 300 g / 1 Vr0?, 120 - 290 g% 1 uni = wi- ;: the same current .!, t @; "a.`kt? 0-tVJI "' 0.002 mm @ - @ ,, t @ y @ @@ -> ae e "- h -omelectrolyte on that :; il. @ W> .r possible: i # ch uäid. the procedure draws I use chrome baths a ii. te2sC @. #: i. ? @h: @ tg @; areg @ :, a, 'e: fFLÄure und KalilLm- _t.17.,. t @ l @., * .. `I w ,. - wanti t can ., J'I @ ..: 1.ix-@iric: c @ z: .e finished Hochglana- c @ e @ lir, @ t _ :. y @ s : @ * .- r. @. Y @; lt. ##, nb # Di.de: r3 lad @ zä. Of the j J # e 1 = t ,. , tz- a microcrack network ? ra @ '_. -. :: xrx # 3,: * t. # YIMi measured linearly. färf.w: 'c' t the chromium electrolyte with the Rar, @ dsF: t> @ :: OrO3, @ ?: ° 'y T and K2SiF6® 2> constant and sicahe: r Ariiei.tswei .; e the electrolyte without techn. Effort such as compressed air circulation , etc.

.@ a)vi Wirtschaftlichkeit des Verfahrens aufgrun#.d,3r chemii#Chen Steuerung beider Elektrolyte mit den Grundealzen Or0t )32S0, und K2Si.r'6.. @ a) vi Economics of the process based on # .d, 3r chemii # Chen Control of both electrolytes with the basic salts Or0t) 32S0, and K2Si.r'6.

b) Aufgrund des Fortfalls einer Zwischenspülung zwischen der Verchromuig in, 1'..@?. zniC, Bad 2 kein Vehranfall an Chromabwässea»n und keim Veb.rvcrzirauch an Spülwasser. Das anfallende Ohromabwa,iser kann zci Ko:,:stantha?_tnn beider EL"zktrolyte verwar: werfen, wodurch praktisch kehr. zu entgix`tendes Chromabwsssp:E# eehr anfällt.,b) Due to the omission of an intermediate rinse between the chrome-plated in, 1 '.. @ ?. ZniC, Bad 2 no accumulation of chrome waste water and germ contamination of rinse water. The resulting Ohromabwa, iser can zci Ko:,: stantha? _Tnn both tablespoons "zktrolyte warned: throw, which practically sweeps. Chromium waste to be degassed: A lot of waste occurs.,

Claims (1)

n s t r ü r. c? e Yerfahrel: zum Abscheiden von glänzenden mikrorissiger_ @J.T°.,@m- überzügen mittels Doppelverchromung, dadurch geker.nae-:"*ret, daß die Ware in ZWel mischsauren Chrombädern mit unte:-:=;@hied- lichen Gehalten #r. :°h@°omsälarr@, Schwefe--'säure und Kalitip,-- silikofluorid unmittelbar hinzereinander nach dem Vern-i.ckeln getaucht und in diesen verchx-axrt wird, wobei das erste; "ad aus 300 - 400 9%1 Cr03, 195 - 295 gll üg'SC;" 11)15 - `.; g /l K SiF6 besteht und die Verchromung mit einer #I,- 30 : A/qdm bei 40 - 450 C zu einer Auflagestärkcs v:0,0005 0,0005 mm erfolgt, und das zweite Bad sich aus 200 - 30G g@l Cr-3' 1,0 - 2,0 9/l H2S04, 4,0 - 8,0 g11 K2SiF6 zusammensetzt und-mit derselben Stromstärke und Temperatur eine Auflagestärke von 0,001 - 0,002 mm herbeiführt.
2. Einrichtung zur Durchführung des Verfahrens nach Anspr u ::.'i 1, dadurch gekennzeichnet, daL4 der Elektrolyt in einem eirua achen Chrombad-Behälter ohne Bodenkörper arbeitet. ns t r ü r. c? e Yerfahrel: for separating shiny micro-cracked_ @ JT °., @ M- coverings by means of double chrome plating, thereby geker.nae -: "* ret, that the goods in ZWel mixed acidic chromium baths with below: -: =; @ hied- ual content # r. : ° h @ ° omsälarr @, sulfuric acid and Kalitip, - silicon fluoride immediately after each other after nippling is immersed and in this verchx-axrt, the first; "ad from 300 - 400 9 % 1 Cr03, 195 - 295 gll üg'SC;" 11) 15 -`.; g / l K SiF6 and the chrome plating with a # I, - 30 : A / qdm at 40 - 450 C for a layer thickness v: 0.0005 0.0005 mm, and the second bath consists of 200 - 30G g @ l Cr-3 ' 1.0 - 2.0 9 / l H2S04, 4.0 - 8.0 g11 K2SiF6 composed and -with with the same current intensity and temperature, an application force of 0.001 - 0.002 mm.
2. Device for carrying out the method according to claims 1: 1, characterized in that the electrolyte works in a simple chrome bath container without a bottom body.
DE19631521079 1963-12-04 1963-12-04 Process for depositing shiny, micro-cracked chrome coatings by means of double chrome plating Pending DE1521079A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV0024975 1963-12-04

Publications (1)

Publication Number Publication Date
DE1521079A1 true DE1521079A1 (en) 1970-05-14

Family

ID=7581583

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19631521079 Pending DE1521079A1 (en) 1963-12-04 1963-12-04 Process for depositing shiny, micro-cracked chrome coatings by means of double chrome plating

Country Status (1)

Country Link
DE (1) DE1521079A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0147484A1 (en) * 1983-12-30 1985-07-10 INDUSTRIALE S.r.l. A process for obtaining a protective coating for surfaces subjected to mechanical and thermal wear, and coating obtained by such process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0147484A1 (en) * 1983-12-30 1985-07-10 INDUSTRIALE S.r.l. A process for obtaining a protective coating for surfaces subjected to mechanical and thermal wear, and coating obtained by such process

Similar Documents

Publication Publication Date Title
DE19748926B4 (en) A method of electroplating a silicon-containing aluminum alloy, cylinder block of a silicon-containing aluminum alloy
DE3031501C2 (en)
DE1521079A1 (en) Process for depositing shiny, micro-cracked chrome coatings by means of double chrome plating
ATE7517T1 (en) PROCESS FOR MAKING AN ARTICLE COATED WITH AN ALUMINUM-ZINC ALLOY TO IMPROVE CORROSION RESISTANCE.
DE1496835B2 (en) Process for the two-stage galvanic tinning of sheet steel
DE1621406C3 (en) Process for the electrophoretic application of inorganic, oxidic surface protective layers
DE69604372T2 (en) Pretreatment process for coating metal objects
DE602004001208T2 (en) Electrolytic composition and method of electroplating with tin
DE957615C (en) Multi-stage galvanic bright nickel plating
DE19913273C2 (en) Process for producing pearl chrome layers on workpieces made of metal, in particular steel
DE3839824C2 (en)
DE2527570C3 (en) 7/24/74 Japan 84113-74
DE69210773T2 (en) Process for sealing an anodizing coating produced in a chromic acid bath
DE930116C (en) Process for the production of a floor covering, in particular from viscous plastic compound which has hardened after the application
AT159022B (en) Process for the production of gravure printing plates.
DE2208315B2 (en) Process for the electrolytic color of anodically produced oxide layers on aluminum and aluminum alloys
DE1964354A1 (en) Method for determining the size of the surface of workpieces
DE3131367C2 (en) Process and electrode for the electroforming production of form-forming metal tools
DE494746C (en) Process for the permanent connection of components by dip soldering
DE10240958B3 (en) Shell produced by galvanic deposition used in the production of plastic parts has a deposition layer with layer regions and a straddled recess, and a bridge structure embedded in a layer region on both sides of the recess
DE974072C (en) Process for determining inexpensive polishing electrolytes for the purpose of creating a homogeneous surface of irregularly shaped metal parts
DE419747C (en) Device for electrolytic plating of sheet metal
DE1202005B (en) Process for electrorefining nickel
DE1496823C (en) Process for the galvanic separation of corrosion-resistant, three-layer nickel or nickel-cobalt alloy coatings on metals
DE2301601C3 (en) Bath for the cathodic treatment of the surface of sheet steel