SE425103B - PROCEDURE KIT AND BATH FOR ANODIC DEGRADATION OF COPPER OR COPPER ALLOY - Google Patents
PROCEDURE KIT AND BATH FOR ANODIC DEGRADATION OF COPPER OR COPPER ALLOYInfo
- Publication number
- SE425103B SE425103B SE8100202A SE8100202A SE425103B SE 425103 B SE425103 B SE 425103B SE 8100202 A SE8100202 A SE 8100202A SE 8100202 A SE8100202 A SE 8100202A SE 425103 B SE425103 B SE 425103B
- Authority
- SE
- Sweden
- Prior art keywords
- alkali metal
- ammonium
- bath
- copper
- sulphamate
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/02—Etching
- C25F3/14—Etching locally
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/16—Polishing
- C25F3/22—Polishing of heavy metals
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Description
8100202-4 _ Vid genomförandet av förfarandet enligt upp- finningen användas företrädesvis badspänningar inom området 15-20 volt och strömtätheter (på anodytan) av storleksordningen 10-20 A/dmz. Badtemperaturen bör ej överstiga 250 C. Före- trädesvis hàlles temperaturen inom omrâdet 15-200 C. In carrying out the method according to the invention, bath voltages in the range 15-20 volts and current densities (on the anode surface) of the order of 10-20 A / dmz are preferably used. The bath temperature should not exceed 250 C. Preferably the temperature is kept within the range 15-200 C.
I Avgradningsverkningen beror som bekant på det förhållandet, att strömtätheten och därmed avverkningen är väsentligt större vid skarpa kanter och utskjutande grader på föremålet än vid dess släta ytpartier. Denna egenskap, som brukar benämnas "selektivitet", är som bekant beroende av flera faktorer, såsom de behandlade föremâlens form och storlek, katodens utformning och avståndet anod-katod samt badets led- ningsförmâga. Denna bör ej vara för stor, emedan då såväl selektivitet som ytfinhet försämras. Det har vidare visat sig, att vid förfarandet enligt uppfinningen selektiviteten kan för- bättras väsentligt genom att arbetsströmmen tillföres under intervaller åtskilda av strömlösa pauser. Företrädesvis bör därvid arbetsintervallets längd uppgå till k ä 2 minuter. En pauslängd av nagra sekunder, t.ex. 5 ä 10 sekunder är tillräck- lig och lämplig.As is well known, the deburring effect is due to the fact that the current density and thus the felling is significantly greater at sharp edges and protruding degrees on the object than at its smooth surface portions. This property, which is usually referred to as "selectivity", is known to depend on several factors, such as the shape and size of the treated objects, the design of the cathode and the anode-cathode distance, and the conductivity of the bath. This should not be too large, as both selectivity and surface finish deteriorate. It has further been found that in the method according to the invention the selectivity can be significantly improved by supplying the working current at intervals separated by electroless pauses. Preferably, the length of the working interval should be 2 minutes. A pause of a few seconds, e.g. 5 to 10 seconds is sufficient and suitable.
Ledningsförmágan för badet kan vid förfarandet enligt uppfinningen pá enkelt sätt justeras genom avpassning av halten av flervärd alkohol. vid den föredragna utförings- 'formen av uppfinningen, vid vilken sulfamatet och nitratet utgöras av ammoniumsalter, utgöres den flervärda alkoholen lämpligen av etylenglykol.The conductivity of the bath can be easily adjusted in the process according to the invention by adjusting the content of polyhydric alcohol. In the preferred embodiment of the invention, in which the sulfamate and nitrate are ammonium salts, the polyhydric alcohol is suitably ethylene glycol.
Nedan anges ett exempel pà ett behandlingsbad för förfarandet enligt uppfinningen: etylenglykol 650 viktsdelar ammoniumsulfamat 100 “ ammoniumnitrat 100 " vatten 150 " .The following is an example of a treatment bath for the process of the invention: ethylene glycol 650 parts by weight of ammonium sulfamate 100 "ammonium nitrate 100" water 150 ".
Ammoniumsalterna kunna helt eller delvis utbytas mot alkaliníetal lsalter.The ammonium salts can be completely or partially exchanged for alkali metal salts.
Vid anodisk avgradning av föremål av koppar eller kopparlegering i detta bad användas lämpligen följande arbetsbetingelser: 8100202-4 3 badtemperatur 15-200 C badspänning 15-25 volt anodisk strömtäthet 10-20 A/dmz pH 5,0-6,5.When anodic deburring of objects of copper or copper alloy in this bath, the following working conditions are suitably used: 8100202-4 3 bath temperature 15-200 C bath voltage 15-25 volts anodic current density 10-20 A / dmz pH 5.0-6.5.
Avpassningen av pH-värdet sker genom tillsats av en liten mängd salpetersyra. Denna mäste under badets an- vändning dà och då förnyas, lämpligen genom en av en pH-meter styrd automatisk doseringsanordning.The pH is adjusted by adding a small amount of nitric acid. This must be renewed from time to time during the use of the bath, preferably by an automatic dosing device controlled by a pH meter.
Företrädesvis genomföres behandlingen inter- mittent med ett arbetsintervall och en pauslängd liggande inom de i det föregående angivna gränserna.Preferably, the treatment is carried out intermittently with a working interval and a break length lying within the limits specified above.
De i behandlingsbadet uppträdande kemiska för- loppen äro komplicerade och kunna ej anses fullt utredda. Badet har i praktiken visat sig ha en lång livslängd, förutsatt att dess pH-värde ständigt hàlles inom det angivna området 5-6,5 genom tillsats av salpetersyra och att under badets arbete bildade fast föroreningar (övervägande metallhydroxíder) undan för undan avskiljas, t.ex genom filtrering.The chemical processes occurring in the treatment bath are complicated and cannot be considered fully investigated. The bath has in practice been found to have a long service life, provided that its pH value is constantly kept within the specified range 5-6.5 by adding nitric acid and that solid impurities (predominantly metal hydroxides) formed during the bath are gradually separated, t .ex by filtering.
Claims (10)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8100202A SE425103B (en) | 1981-01-15 | 1981-01-15 | PROCEDURE KIT AND BATH FOR ANODIC DEGRADATION OF COPPER OR COPPER ALLOY |
EP19820900319 EP0070288A1 (en) | 1981-01-15 | 1982-01-15 | A method of anodically deburring articles of copper or copper alloy |
CH554982A CH652421A5 (en) | 1981-01-15 | 1982-01-15 | PROCEDURE FOR ANODICALLY DEBURRING COPPER ITEMS OR COPPER ALLOYS. |
PCT/SE1982/000010 WO1982002408A1 (en) | 1981-01-15 | 1982-01-15 | A method of anodically deburring articles of copper or copper alloy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8100202A SE425103B (en) | 1981-01-15 | 1981-01-15 | PROCEDURE KIT AND BATH FOR ANODIC DEGRADATION OF COPPER OR COPPER ALLOY |
Publications (2)
Publication Number | Publication Date |
---|---|
SE8100202L SE8100202L (en) | 1982-07-16 |
SE425103B true SE425103B (en) | 1982-08-30 |
Family
ID=20342884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8100202A SE425103B (en) | 1981-01-15 | 1981-01-15 | PROCEDURE KIT AND BATH FOR ANODIC DEGRADATION OF COPPER OR COPPER ALLOY |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0070288A1 (en) |
CH (1) | CH652421A5 (en) |
SE (1) | SE425103B (en) |
WO (1) | WO1982002408A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0511557A1 (en) * | 1991-04-29 | 1992-11-04 | Siemens Aktiengesellschaft | Procedure and equipment for deburring of contact pins |
US6294071B1 (en) * | 2000-01-07 | 2001-09-25 | Huntsman Petrochemical Corporation | Methods of forming copper solutions |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3556957A (en) * | 1966-01-03 | 1971-01-19 | Honeywell Inc | Metal treatment |
SE413681B (en) * | 1977-11-22 | 1980-06-16 | Blomsterberg Karl Ingemar | SET AND BATH FOR CATODIC CLEANING OF METAL SURFACES IN A NEUTRAL WATER SOLUTION OF AN ALKALISAL |
SE415891B (en) * | 1979-02-19 | 1980-11-10 | Blomsterberg Karl Ingemar | SET TO ANODICALLY DEGREE AND / OR POLISH A STALL FORM IN AN ELECTROLYTICAL BATH AND BATH FOR EXECUTION OF THE SET |
-
1981
- 1981-01-15 SE SE8100202A patent/SE425103B/en not_active IP Right Cessation
-
1982
- 1982-01-15 WO PCT/SE1982/000010 patent/WO1982002408A1/en unknown
- 1982-01-15 CH CH554982A patent/CH652421A5/en not_active IP Right Cessation
- 1982-01-15 EP EP19820900319 patent/EP0070288A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
SE8100202L (en) | 1982-07-16 |
EP0070288A1 (en) | 1983-01-26 |
WO1982002408A1 (en) | 1982-07-22 |
CH652421A5 (en) | 1985-11-15 |
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