DE2813357A1 - Anticorrosion treatment of galvanising vats - by thermal spraying of cobalt or ceramics - Google Patents
Anticorrosion treatment of galvanising vats - by thermal spraying of cobalt or ceramicsInfo
- Publication number
- DE2813357A1 DE2813357A1 DE19782813357 DE2813357A DE2813357A1 DE 2813357 A1 DE2813357 A1 DE 2813357A1 DE 19782813357 DE19782813357 DE 19782813357 DE 2813357 A DE2813357 A DE 2813357A DE 2813357 A1 DE2813357 A1 DE 2813357A1
- Authority
- DE
- Germany
- Prior art keywords
- cobalt
- ceramics
- vats
- galvanizing
- thermal spraying
- 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.)
- Withdrawn
Links
- 238000005246 galvanizing Methods 0.000 title claims abstract description 12
- 229910017052 cobalt Inorganic materials 0.000 title claims abstract description 8
- 239000010941 cobalt Substances 0.000 title claims abstract description 8
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 239000000919 ceramic Substances 0.000 title claims abstract description 5
- 238000007751 thermal spraying Methods 0.000 title claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 abstract description 4
- 239000007921 spray Substances 0.000 abstract description 4
- 238000005507 spraying Methods 0.000 abstract description 3
- 229910000531 Co alloy Inorganic materials 0.000 abstract description 2
- 238000000137 annealing Methods 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 229910052710 silicon Inorganic materials 0.000 abstract description 2
- 239000010703 silicon Substances 0.000 abstract description 2
- 238000005245 sintering Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 238000007750 plasma spraying Methods 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910001347 Stellite Inorganic materials 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
-
- 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
- C23C2/003—Apparatus
- C23C2/0036—Crucibles
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
Description
Betreffs Anmeldung eines Verfahrens zur Oberflächenverede-Regarding registration of a procedure for surface finishing
lung von Verzinkungskessel u.ä. Wannen zur Vermeidung von korrosiven Einflüssen Titel: Thermisch aufgespritzte Oberfläche für Verzinkungskessel Ansendungagebiet und Zweck: Sektion B (Arbeitsverfahren) Die Erfindung betrifft einen thermisch aufgespritzten Oberflächenschutz zur Vermeidung von korrosiven Einflüssen im Verzinkereiwesen. Durch diesen Oberflächenschutz wird ein vielfaches an Lebensdauer bei Verzinkungskessel erreicht. treatment of galvanizing kettles, etc. Tubs to avoid corrosive Influences Title: Thermally sprayed surface for galvanizing kettle and purpose: Section B (working method) The invention relates to a thermally sprayed Surface protection to avoid corrosive influences in the galvanizing industry. This surface protection increases the service life of galvanizing kettles many times over achieved.
Stand der Technik: Die Verlust summe durch Verschleiß für Verzinkungskessel beläuft sich auf ca. 30 - 40 Millionen DM. 1) Hinzu kommt noch der Ausfall durch hohe Stillstandskosten.State of the art: The total loss due to wear and tear for galvanizing kettles amounts to approx. 30 - 40 million DM. 1) In addition there is the failure high downtime costs.
Da gegen flüssigen Zink nur eine hochkobalthaltige Legierung (min. 58 % Co) bzw. Keramik beständig ist, bietet sich eine Beschichtung der Kesselinnenseite an. Der Einsatz von plattiertem Blech scheidet aus, da die Verformbarkeit von Kobalt fast Null ist. Since only an alloy with a high cobalt content (min. 58% Co) or ceramic is resistant, the inside of the boiler can be coated at. The use of clad sheet metal is ruled out because the ductility of cobalt is is almost zero.
1) Bezogen auf die Bundesrepublik Deutschland pro Jahr. 1) Based on the Federal Republic of Germany per year.
Sohweißplattierungen mit Stellite oder ähnlichen Kobaltlegierungen bergen sehr große Probleme durch die auftretende Rißbildung in der Schutzschicht. White clad with stellite or similar cobalt alloys have very great problems due to the formation of cracks in the protective layer.
Außerdem muß eine Schweißplattierung verhältnismäßig dick aufgetragen werden wegen der stattfindenden Aufmischung. In addition, a weld cladding must be applied relatively thick because of the mixing that is taking place.
Die Verschleißzeit eines Verzinkungskessels aus 40 mm starkem, siliziumarmen Sonderbaustahl betragt je nach Durchsatzmenge 2 - 5 Jahre. The wear time of a galvanizing kettle made of 40 mm thick, low-silicon Special structural steel is 2 - 5 years depending on the throughput.
Aufgabenstellung: Brreichen einer höheren Lebensdauer durch Auskleiden der Kesselinnenflächen mit korrosionsfestem Werkstoff.Task: Bringing a longer service life through lining the inside of the boiler with corrosion-resistant material.
Lösung und Arbeitsseises Es bietet sich als Lösung eine Schutzschicht durch thermisches Spritzen von Kobalt, hochkobalthaltigen LegierunGen oder Keramik an. Als Spritzwerkstoff kommen Drähte, Stäbe oder Pulver zur Verwendung. An Spritzgeräten werden gasbeheizte Pistolen iz.Solution and working ice The solution is a protective layer by thermal spraying of cobalt, alloys with a high cobalt content or ceramics at. Wires, rods or powder are used as spray material. On sprayers are gas-heated guns iz.
Lichtbogen (Plasmaflamme) Spritzanlagen eingesetzt, die - mit zugeführten Presslu ffi als Zerstäubermedium betrieben - Drähte und Stäbe verarbeiten. Pulver werden in speziellen Spritzgeräten verarbeitet, wobei ein Gasstrom als Träger der angeschmolzenen Pulverpartikel zum Werkstück (Verzinkungskessel) dient. Schichtdicken von 1 - 2 mm sind in der Regel ausreichend. Nur bei höherer mechanischer Beanspruchung z.B. durch anschlagende Teile sind größere Schichtdicken erforderlich. Vor dem Aufspritzen ist die Werkatückoberfläche (Verzinkungskesselinnenseite) metallisch blank zu sandstrahlen. Nach dem Aufspritzen ist eine thermische Nachbehandlung erforderlich. Man erreicht durch ein entsprechendes Glühen ein Einsintern der Spritzschichten. Dies bewirkt beste Hafteigenschaften. Arc (plasma flame) spray systems are used, which - with fed Presslu ffi operated as an atomizing medium - process wires and rods. powder are processed in special spray equipment, with a gas stream as the carrier of the melted powder particles to the workpiece (galvanizing kettle) is used. Layer thicknesses 1 - 2 mm are usually sufficient. Only with higher mechanical stress For example, due to impacting parts, greater layer thicknesses are required. Before spraying the workpiece surface (inside of the galvanizing tank) is to be sandblasted to a bare metal. After spraying is a thermal one Post-treatment required. Sintering of the sprayed layers is achieved by appropriate annealing. This results in the best adhesive properties.
Durch Zusatz von Bor erreicht man selbstfließende Eigenschaften. Bei der thermischen Nachbehandlung entstehen dann hochwertige, poren- und rißfreie Schichten. Bei den im Betrieb auftretenden Temperaturen werden die guten Eigenschaften der Schichten nicht verändert.Self-flowing properties are achieved by adding boron. at The thermal aftertreatment then creates high-quality, pore-free and crack-free layers. The good properties of the Layers not changed.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19782813357 DE2813357A1 (en) | 1978-03-28 | 1978-03-28 | Anticorrosion treatment of galvanising vats - by thermal spraying of cobalt or ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19782813357 DE2813357A1 (en) | 1978-03-28 | 1978-03-28 | Anticorrosion treatment of galvanising vats - by thermal spraying of cobalt or ceramics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2813357A1 true DE2813357A1 (en) | 1979-10-11 |
Family
ID=6035584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19782813357 Withdrawn DE2813357A1 (en) | 1978-03-28 | 1978-03-28 | Anticorrosion treatment of galvanising vats - by thermal spraying of cobalt or ceramics |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2813357A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4351854A (en) * | 1979-11-21 | 1982-09-28 | Centre De Recherches Metallurgiques-Centrum Voor Research In De Metallurgie | Method of protecting devices for galvanizing metal products |
-
1978
- 1978-03-28 DE DE19782813357 patent/DE2813357A1/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4351854A (en) * | 1979-11-21 | 1982-09-28 | Centre De Recherches Metallurgiques-Centrum Voor Research In De Metallurgie | Method of protecting devices for galvanizing metal products |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8139 | Disposal/non-payment of the annual fee |