DE745789C - Process for expelling gas deposits, especially hydrogen, from the surface layers of workpieces - Google Patents
Process for expelling gas deposits, especially hydrogen, from the surface layers of workpiecesInfo
- Publication number
- DE745789C DE745789C DEB191051D DEB0191051D DE745789C DE 745789 C DE745789 C DE 745789C DE B191051 D DEB191051 D DE B191051D DE B0191051 D DEB0191051 D DE B0191051D DE 745789 C DE745789 C DE 745789C
- Authority
- DE
- Germany
- Prior art keywords
- workpieces
- surface layers
- especially hydrogen
- expelling gas
- gas deposits
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 title claims 3
- 239000007789 gas Substances 0.000 title claims 2
- 239000001257 hydrogen Substances 0.000 title claims 2
- 229910052739 hydrogen Inorganic materials 0.000 title claims 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 title claims 2
- 239000002344 surface layer Substances 0.000 title claims 2
- 238000000576 coating method Methods 0.000 claims 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
Description
Verfahren zum Austreiben von Gaseinlagerungen, insbesondere Wasserstoff, aus den Oberflächenschichten von Werkstücken Zusatz zum Patent 715 515 Gegenstand des Hauptpatents 715 515 ist ein Verfahren zur elektrolytischen Vorbehandl.ung von mit einem Überzug zu versehenden Metallen, welches darin besteht, daß das, neutrale oder alkalische Bad, in welchem das zu behandelnde Werkstück als Anode geschaltet ist, mit kurzen intermittierenden Stromstößen betrieben wird, deren Dauer nach der Eigenart des Metalls sowie des Elektrolyten so bemessen ist, daß ein oxydischer Niederschlag auf dem Werkstück noch nicht entsteht.A process for the expulsion of gas inclusions, in particular hydrogen, from the surface layers of workpieces addition to Patent 715,515 subject of the main patent 715,515 a method for the electrolytic Vorbehandl.ung of a coating to be provided metals, which consists in that the neutral or alkaline Bath, in which the workpiece to be treated is connected as an anode, is operated with short intermittent current surges, the duration of which is dimensioned according to the nature of the metal and the electrolyte so that an oxidic deposit does not yet form on the workpiece.
Der Erfolg dieser Vorbehandlung nach dem Hauptpatent besteht in der Austreibung des in den Oberflächenschichten des Werkstücks befindlichen Wasserstoffs mit dem Ergebnis, daß die bei der folgenden Elektroplattierung aufgetragene Metallschicht weitgehend gegen Korrosion gesichert ist.The success of this pretreatment according to the main patent consists in the Expulsion of the hydrogen located in the surface layers of the workpiece with the result that the metal layer deposited in the following electroplating is largely secured against corrosion.
Es wurde nun gefunden, daß das Verfahren nach dem Hauptpatent sich mit besonderem Vorteil nicht nur als Vorbehandlungsverfahren für die nachfolgende Elektroplattierung o. dgl, sondern ganz allgemein für die Behandlung von Werkstücken verwenden läßt, ohne däß diese einer anschließenden Elektroplattierung unterzogen werden, um aus den Werkstücken bzw. ihrer Oberfläche, sei sie mit einem oder mehreren galvanischen überzügen versehen oder nicht, den darin eingelagerten Wasserstoff auszutreiben. Dadurch werden wesentliche Vorteile erzielt. Wird das Verfahren bei Werkstücken angewandt, die bereits mit galvanischen Überzügen versehen sind, so werden durch die Austreibung des während der Galvanisierung in der Oberfläche eingelagerten Wasserstoffs die Werkstücke nachträglich korrosionsfester gemacht.It has now been found that the process according to the main patent with particular advantage not only as a pretreatment process for the subsequent one Electroplating or the like, but more generally for the treatment of workpieces can be used without subjecting them to subsequent electroplating be in order from the workpieces or their surface, be it with one or more galvanic coatings or not, the hydrogen stored therein to drive out. Significant advantages are thereby achieved. Will the procedure at Workpieces applied that are already provided with galvanic coatings, so are driven out of the surface during electroplating Hydrogen makes the workpieces more corrosion-resistant afterwards.
Die Durchführung des Verfahrens: im einzelnen ist im übrigen die gleiche wie nach dem Hauptpatent.The procedure for carrying out the process is otherwise the same as according to the main patent.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB191051D DE745789C (en) | 1940-06-28 | 1940-06-28 | Process for expelling gas deposits, especially hydrogen, from the surface layers of workpieces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB191051D DE745789C (en) | 1940-06-28 | 1940-06-28 | Process for expelling gas deposits, especially hydrogen, from the surface layers of workpieces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE745789C true DE745789C (en) | 1944-04-25 |
Family
ID=7011247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEB191051D Expired DE745789C (en) | 1940-06-28 | 1940-06-28 | Process for expelling gas deposits, especially hydrogen, from the surface layers of workpieces |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE745789C (en) |
-
1940
- 1940-06-28 DE DEB191051D patent/DE745789C/en not_active Expired
Non-Patent Citations (1)
| Title |
|---|
| None * |
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