DE1159728B - Process for applying phosphate coatings - Google Patents

Process for applying phosphate coatings

Info

Publication number
DE1159728B
DE1159728B DEM22835A DEM0022835A DE1159728B DE 1159728 B DE1159728 B DE 1159728B DE M22835 A DEM22835 A DE M22835A DE M0022835 A DEM0022835 A DE M0022835A DE 1159728 B DE1159728 B DE 1159728B
Authority
DE
Germany
Prior art keywords
phosphating
applying phosphate
phosphate coatings
equilibrium
bath
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
DEM22835A
Other languages
German (de)
Inventor
Dr Heinz Keller
Dr Werner Rausch
Heinrich Fleischhauer
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.)
GEA Group AG
Original Assignee
Metallgesellschaft 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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Priority to DEM22835A priority Critical patent/DE1159728B/en
Publication of DE1159728B publication Critical patent/DE1159728B/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C22/00Chemical 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
    • C23C22/73Chemical 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 characterised by the process

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)

Description

Verfahren zum Aufbringen von Phosphatüberzügen Zusatz zum Patent 1147 819 Im Patent 1147 819 ist ein Verfahren zum Aufbringen von Phosphatschichten auf Metallen, insbesondere Eisen, beschrieben, bei dem mit einer Oxydschicht bedeckte Metalle durch Erhitzen und gegebenenfalls Abkühlen auf 100 bis 400° C, vorzugsweise 200 bis 300° C, gebracht und heiß mit der Phosphatierungslösung behandelt werden. Die Oxydschicht kann hierbei durch oxydierende Glühung aufgebracht werden. Sie kann bei einer Weichglühung oder anderen Wärmebehandlung des Werkstücks aufgebracht werden. Hierbei ist es möglich, das Werkstück nach einer Glühung in schwach oxydierender Atmosphäre auf 100 bis 400° C zu bringen und dabei zwischen dem Glühen und dem Phosphatieren eine Abkühlung derart vorzunehmen, daß das Werkstück bei Temperaturen von 100 bis 400° C, vorzugsweise nicht unter 200° C, in die Phosphatierungslösung kommt.Process for applying phosphate coatings Addition to patent 1147 819 In patent 1147 819 is a method for applying phosphate layers on Metals, especially iron, described in which covered with an oxide layer Metals by heating and optionally cooling to 100 to 400 ° C, preferably 200 to 300 ° C, brought and treated hot with the phosphating solution. The oxide layer can be applied by oxidizing annealing. she can be applied during a soft annealing or other heat treatment of the workpiece. Here it is possible to have the workpiece in a weakly oxidizing state after annealing Bring the atmosphere to 100 to 400 ° C and between the annealing and the phosphating make a cooling so that the workpiece at temperatures from 100 to 400 ° C, preferably not below 200 ° C, comes into the phosphating solution.

Allgemein ist es Gegenstand dieses Patentes, die Metalloberfläche, wenn sie heiß in die Phosphatierungslösung eingebracht wird, nicht blank, d. h. oxydfrei, vorliegen zu haben, wie dies bei dem Verfahren des Patentes 974 365 der Fall ist, sondern, mit einer leichten Zunderschicht bedeckt, heiß in die Phosphatierungslösung zu bringen.In general, it is the subject of this patent, the metal surface, if it is introduced hot into the phosphating solution, not bright, d. H. oxide-free to have, as in the process of the patent 974 365 of the Fall is, but, covered with a light layer of scale, hot in the phosphating solution bring to.

Es wurde nun gefunden, daß dieses Verfahren in den Fällen, in denen nicht mit Phosphatierungssystemen gearbeitet wird, die beim Kochpunkt im Gleichgewicht sind, so modifiziert werden kann, daß das Abkühlen auf oder in die Nähe der Temperatur durchgeführt wird, bei der das betreffende Phosphatierungssystem im Gleichgewicht ist. Man arbeitet daher vorzugsweise bei den Phosphatierungssystemen, die bei niedrigeren Temperaturen phosphatieren und sich im Gleichgewicht befinden, so, daß der Gegenstand mit etwa der Temperatur trocken in die Badlösung eingebracht wird, bei der das Bad arbeitet. Dies hat den Vorteil, daß durch den Gegenstand die Badlösung nicht zu sehr aufgeheizt wird, wodurch bei hohen Durchsätzen die Gefahr bestünde, daß das Bad aus dem Gleichgewicht kommt und Schlamm bildet. Man bringt daher bei dem im Hauptpatent beschriebenen Verfahren vorzugsweise die Gegenstände mit einer solchen Temperatur in das Behandlungsbad, daß das Gleichgewicht nicht wesentlich gestört wird.It has now been found that this method can be used in those cases in which phosphating systems that are in equilibrium at the boiling point are not used can be modified so that cooling to or near temperature is carried out in which the phosphating system in question is in equilibrium is. It is therefore preferable to work with the phosphating systems, which are lower Phosphate temperatures and are in equilibrium so that the object is introduced dry into the bath solution at about the same temperature as the bath is working. This has the advantage that the bath solution does not get through the object is very heated, whereby at high throughputs there would be the risk that the Bad gets out of whack and sludge forms. One therefore brings with the im Main patent method described preferably the objects with such Temperature in the treatment bath that the equilibrium is not significantly disturbed will.

Das Verfahren bringt bei allen bei erhöhter Temperatur arbeitenden Bädern den Vorteil, daß der Phosphatierungsvorgang gleich auf dem auf etwa Badtemperatur befindlichen Gegenstand einsetzen kann, ohne daß die Gefahr besteht, daß das Bad durch den Wärmeübergang von den zu phosphatierenden Gegenständen aus dem Gleichgewicht gerät. Diese Verfahrensweise sei an Hand eines Beispiels erläutert.The process brings benefits to everyone working at elevated temperature Baths have the advantage that the phosphating process takes place at about the same temperature as the bath can use the object located without the risk of the bathroom due to the heat transfer from the objects to be phosphated out of balance device. This procedure is explained using an example.

Zur Phosphatierung soll eine Lösung verwendet werden, die im Liter enthält: 11,4 g Zink 35 g P205 12,8 g C10, 4,8 g Na20 und die sich bei 68° C im Gleichgewicht befindet. Von der Ziehbank kommende fettige Stahlrohre wurden in schwach oxydierender Atmosphäre bei etwa 550 bis 600° C 15 Minuten fettfrei und weich geglüht, in der gleichen Atmosphäre abgekühlt und mit etwa 70° C in das Phosphatierungsbad eingebracht. Eine gleichmäßige Phosphatierung wurde in 2 bis 4 Minuten erzielt.A solution should be used for phosphating, which is per liter contains: 11.4 g zinc 35 g P205 12.8 g C10, 4.8 g Na20 and which are at 68 ° C in the Equilibrium is located. Greasy steel pipes coming off the drawbench turned in weak oxidizing atmosphere at approx. 550 to 600 ° C for 15 minutes fat-free and soft-annealed, cooled in the same atmosphere and at about 70 ° C in the phosphating bath brought in. Even phosphating was achieved in 2 to 4 minutes.

Claims (1)

PATENTANSPRUCH: Verfahren zum Aufbringen von Phosphatschichten auf Metallen nach Hauptpatent 1147 819, dadurch gekennzeichnet, daß das Behandlungsgut vor dem Einbringen in das Phosphatierungsbad so weit abgekühlt wird, daß das Gleichgewicht der Behandlungslösung nicht durch Temperaturänderungen wesentlich gestört wird. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 229 173.PATENT CLAIM: Process for applying phosphate layers on Metals according to main patent 1147 819, characterized in that the material to be treated before it is introduced into the phosphating bath, it is cooled to such an extent that equilibrium is achieved the treatment solution is not significantly disturbed by temperature changes. Documents considered: German Patent No. 229 173.
DEM22835A 1954-04-24 1954-04-24 Process for applying phosphate coatings Pending DE1159728B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM22835A DE1159728B (en) 1954-04-24 1954-04-24 Process for applying phosphate coatings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM22835A DE1159728B (en) 1954-04-24 1954-04-24 Process for applying phosphate coatings

Publications (1)

Publication Number Publication Date
DE1159728B true DE1159728B (en) 1963-12-19

Family

ID=7298866

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM22835A Pending DE1159728B (en) 1954-04-24 1954-04-24 Process for applying phosphate coatings

Country Status (1)

Country Link
DE (1) DE1159728B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4416705A (en) * 1981-03-06 1983-11-22 Occidental Chemical Corporation Composition and process for production of phosphate coatings on metal surfaces

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE229173C (en) *

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE229173C (en) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4416705A (en) * 1981-03-06 1983-11-22 Occidental Chemical Corporation Composition and process for production of phosphate coatings on metal surfaces

Similar Documents

Publication Publication Date Title
DE1159728B (en) Process for applying phosphate coatings
DE1521447B2 (en) PROCESS FOR DIFFUSION COATING OF METAL PRODUCTS
CH648350A5 (en) METHOD FOR isothermal austempering OF workpieces made of ferrous materials.
DE2553051B2 (en) Process for hot dip aluminizing of iron alloy products
DE957395C (en) Process for quenching and tempering workpieces made of steel and steel alloys directly from the hot working heat
DE1521060B1 (en) Process for the production of matt tinplate by electroplating
DE822006C (en) Heat treatment of glass objects
DE740517C (en) Process for the heat treatment of austenitic materials in a tower furnace
DE697556C (en) Process for the treatment of metals which are subjected to cold working
EP0288036A3 (en) Process for cooling a heated material, and device to carry out the process
DE974365C (en) Process for applying phosphate coatings
DE3142359A1 (en) Process and device for heat-treating workpieces
DE687310C (en) Tool for cold forming metals
DE737025C (en) Quenchants for heated metals
AT212662B (en) Process to avoid susceptibility to corrosion when phosphating iron and steel with the help of solutions of non-layer-forming phosphates in spray systems
DE926073C (en) Process for hardening and tempering objects made of steel
DE898451C (en) Method and device for the partial nitriding of elongated bodies
DE907008C (en) Process for the descaling of objects made of iron, steel, copper and copper alloys without damaging the metallic surface
DE974004C (en) Process to improve the non-cutting deformation of workpieces made of iron and zinc
DE689026C (en) Process for the production of protective coatings on iron moldings
DE742413C (en) Process for pickling magnesium and magnesium alloys
DE879554C (en) Process to improve the strength properties of nitrided workpieces
AT134252B (en) Process for the production of a rust preventive and for the treatment of iron and steel with this rust preventive.
DE976070C (en) Process for preparing metallic semi-finished products for non-cutting deformation, especially cold deformation
DE847389C (en) Process for chemical or electrolytic polishing of metal objects