DE892994C - Process for the production of corrosion-resistant, especially heat-resistant coatings on objects made of iron and steel - Google Patents

Process for the production of corrosion-resistant, especially heat-resistant coatings on objects made of iron and steel

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Publication number
DE892994C
DE892994C DEK5410D DEK0005410D DE892994C DE 892994 C DE892994 C DE 892994C DE K5410 D DEK5410 D DE K5410D DE K0005410 D DEK0005410 D DE K0005410D DE 892994 C DE892994 C DE 892994C
Authority
DE
Germany
Prior art keywords
resistant
aluminum
objects
iron
corrosion
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
Application number
DEK5410D
Other languages
German (de)
Inventor
Gottfried Dr Kremer
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DEK5410D priority Critical patent/DE892994C/en
Application granted granted Critical
Publication of DE892994C publication Critical patent/DE892994C/en
Expired legal-status Critical Current

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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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/34—Embedding in a powder mixture, i.e. pack cementation
    • C23C10/58—Embedding in a powder mixture, i.e. pack cementation more than one element being diffused in more than one step
    • 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
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/12—Aluminium or alloys based thereon
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)

Description

Verfahren zur Herstellung von korrosionswiderstandsfähigen, insbesondere hitzebeständigen Überzügen auf Gegenständen aus Eisen und Stahl Es ist bekannt, Gegenstände aus Eisen oder Stahl durch einen Chromdiffusionsüberzug korlrosionswiderstandsfähig, insbesondere hitzebeständig zu machen. Solche Überzüge gewähren aber selbst an Luft nur eine Beständigkeit bis zu Temperaturen von höchstens 8oo° C. Es ist ferner nicht mehr neu, Gegenstände aus Eisen oder Stahl zur Verbesserung ihrer Korrosions- und Hitzebeständigkeit mit einem Aluminiumüberzug zu versehen, durch den eine Zunderbeständigkeit erzielt werden kann, die bis zu Temperaturen von etwa goö° C reicht.Process for the production of corrosion-resistant, in particular heat-resistant coatings on objects made of iron and steel It is known Objects made of iron or steel are corrosion-resistant thanks to a chrome diffusion coating, in particular to make them heat-resistant. Such coatings, however, are even exposed to air only a resistance up to temperatures of at most 8oo ° C. It is also not more new, items made of iron or steel to improve their corrosion and resistance To provide heat resistance with an aluminum coating, through which a scale resistance can be achieved, which ranges up to temperatures of about goö ° C.

Eingehende Versuche haben nunmehr überraschenderweise ergeben, daß Gegenstände aus Eisen oder Stahl ein wesentlich bessereis'Verhalten gegen Korrosionsbeanspruchungen, insbesondere in der Hitze zeigen, wenn man die Gegenstände zunächst mit einem Chromdiffusionsüberzug und alsdann durch Tauchen in ein Bad aus Aluminium zusätzlich mit einem Aluminiumdiffwsionsüberzug versieht. Der sich hierbei bildende- Chrom und Aluminium enthaltende D,iffusio@n:süberzug gewährleistet eine weitaus bessere Korrosionswiderstandsfähigkeit, insbesondere Zunder!beständigkeit, als der reine Chrom- oder reine Aluminium-diffusionsüberzug. Eisen- und Stahlproben, die gemäß der Erfindung behandelt worden sind, haben bei den üblichen Zunde,rversuchen, die über eine Zeitspanne von 12o Stunden ;gehen, Beständigkeit bei Temperaturen bis zu rrao'°'C gezeigt. Insbeisondere, sind auch' die: so; .behandelten-Gegenstände sehr wider standsfähig-ggegem Verb.-i-@nriüivgsgas6, Wasserdampf sowie schwefelhaltige Gase. - '-Die Hitzebeständigkeit des: zuerst aufge@bra@hten Chromdiffusionsüberzuges ist inm. aillgemeinen aus- -reichend, um beim Tauchen der Gegenstände in das A@luminiünibad eine Verzunderung zu verhüten... In besonderen Fällen jedoch, z. B: beim Tauchen in besonders heiße Aluminiumbäder, ist es vorteilhaft, die Gegenstände zum Schutz gegen Verzunderungserscheinungen vor dem Tauchen mit einem .Zink= oderLeichtmetallspritzüberzug zu versehen. Außerdem hat es sich zuweilen als zweckmäßig erwiesen, die getauchten Gegenstände zwecks Vervollständigung der Diffusion vor dem Gebrauch zu glühen. -An Stelle des Aluminiumbades kann erfindungsgemäß auch- ein aus einer Aluminiumlegierung,-z. B. einer Aluminium-Magnesium-Legierung be stehendes Bad verwendet werden:-In-depth experiments have now surprisingly shown that Objects made of iron or steel have a significantly better behavior against corrosion, show especially in the heat when you first coat the objects with a chrome diffusion coating and then by immersion in an aluminum bath with an additional aluminum diffusion coating provides. The chrome and aluminum-containing D, iffusio @ n: s coating that forms in the process ensures far better corrosion resistance, in particular Resistance to scale than the pure chrome or pure aluminum diffusion coating. Iron and steel samples treated according to the invention have at the usual ignition attempts, which go over a period of 12o hours, Shown resistance at temperatures up to rrao '°' C. In particular, are even' the: so; .treated-objects very resistant-against Verb.-i-@nriüivgsgas6, Water vapor and sulphurous gases. - '-The heat resistance of the: first to @ bra @ hten Chrome diffusion coating is inm. Generally sufficient to dive the Objects in the A @ luminiünibad to prevent scaling ... In particular However, in cases such. B: when diving in particularly hot aluminum baths, it is advantageous to the items to protect against scaling before diving with to be provided with a zinc or light metal spray coating. Besides, it has at times Proven to be useful, the submerged items in order to complete the Diffusion to glow before use. -Instead of the aluminum bath, according to the invention also - one made of an aluminum alloy, -z. B. an aluminum-magnesium alloy existing bathroom can be used: -

Claims (3)

PATENTANSPRÜCHE: -. i. Verfahren zur Herstellung von # korräsi6nswiderstandsfäh.igen, insbesondere hitzebeständigen Qberzige ,auf Gegenständen - aus ' Eisen oder Stähl; dadurch gekennzeichnet, idaß die Geigenstände zunächst mit -einem Chromdiffusionsüberzug,, und alsdann durch Tauchen in ein Bad aus. ÄlÜmnium zusätzlich mit einem Aluminiumdiffusionsüberzug versehen werden. . PATENT CLAIMS: -. i. Process for the production of corrosion-resistant, especially heat-resistant coatings on objects - made of iron or steel; characterized in that the violin stands are first coated with a chrome diffusion coating, and then by being immersed in a bath. ÄlÜmnium can also be provided with an aluminum diffusion coating. . 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß die Gegenstände vor dem Tauchen mit einem Zink- oder Leichtmetall-Spritzüberzug versehen werden. 2. The method according to claim i, characterized in that the Before diving, give objects a zinc or light metal spray coating will. 3. Verifahren nach den Ansprüchen i oder 2, dadurch gekennzeichnet, daß die Gegenstände anschließend an das Tauchen geglüht werden. q.. Verfahren nach den Ansprüchen i bis 3, . dadurch gekennzeichnet, da.ß an Stelle des Aluminiü,nibädes ein aus einerAluminiumlegierung, z. B. einer Aluminium-Magneisium-Legierung, bestehendes Bad verwendet wird. - 5-: Verwendung -'von nach den Ansprüchen. i bis q. behandelten Gegenständen für solche - Zwecke, bei denen es auf eine große Widerstandsfähigkeit gegen Verbrennungsgase, Wasserdampf oder schwefelhaltige Gase ankommt.3. Verifahren according to claims i or 2, characterized in that the objects are then annealed to the dipping. q .. procedure according to the Claims i to 3,. characterized in that instead of aluminum, nibades an aluminum alloy, e.g. B. an aluminum-magnesium alloy, existing Bath is used. - 5-: Use -'von according to the claims. i to q. treated Objects for such - purposes that require great resistance against combustion gases, water vapor or sulphurous gases.
DEK5410D 1944-02-20 1944-02-20 Process for the production of corrosion-resistant, especially heat-resistant coatings on objects made of iron and steel Expired DE892994C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK5410D DE892994C (en) 1944-02-20 1944-02-20 Process for the production of corrosion-resistant, especially heat-resistant coatings on objects made of iron and steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK5410D DE892994C (en) 1944-02-20 1944-02-20 Process for the production of corrosion-resistant, especially heat-resistant coatings on objects made of iron and steel

Publications (1)

Publication Number Publication Date
DE892994C true DE892994C (en) 1953-10-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEK5410D Expired DE892994C (en) 1944-02-20 1944-02-20 Process for the production of corrosion-resistant, especially heat-resistant coatings on objects made of iron and steel

Country Status (1)

Country Link
DE (1) DE892994C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1235702B (en) * 1960-06-08 1967-03-02 Boller Dev Corp Process for applying firmly adhering coatings made of aluminum or an aluminum alloy to ferrous metals for protection against oxidation at high temperatures by immersion in a molten aluminum bath

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1235702B (en) * 1960-06-08 1967-03-02 Boller Dev Corp Process for applying firmly adhering coatings made of aluminum or an aluminum alloy to ferrous metals for protection against oxidation at high temperatures by immersion in a molten aluminum bath

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