CS197698B1 - Double course protective coat of heat stressed components - Google Patents
Double course protective coat of heat stressed components Download PDFInfo
- Publication number
- CS197698B1 CS197698B1 CS777659A CS765977A CS197698B1 CS 197698 B1 CS197698 B1 CS 197698B1 CS 777659 A CS777659 A CS 777659A CS 765977 A CS765977 A CS 765977A CS 197698 B1 CS197698 B1 CS 197698B1
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- layer
- weight
- nickel
- calcium oxide
- percent
- Prior art date
Links
- 230000001681 protective effect Effects 0.000 title description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000011253 protective coating Substances 0.000 claims abstract description 10
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 7
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000292 calcium oxide Substances 0.000 claims abstract description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 4
- 239000011651 chromium Substances 0.000 claims abstract description 4
- 238000007750 plasma spraying Methods 0.000 claims description 2
- 238000000137 annealing Methods 0.000 claims 1
- 238000010304 firing Methods 0.000 abstract 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 8
- 239000010410 layer Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- YNBADRVTZLEFNH-UHFFFAOYSA-N methyl nicotinate Chemical compound COC(=O)C1=CC=CN=C1 YNBADRVTZLEFNH-UHFFFAOYSA-N 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 150000003464 sulfur compounds Chemical class 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/04—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler and characterised by material, e.g. use of special steel alloy
-
- 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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/321—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
-
- 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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
-
- 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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
- C23C28/341—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one carbide layer
-
- 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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
- C23C28/345—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer
-
- 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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
- C23C28/345—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer
- C23C28/3455—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer with a refractory ceramic layer, e.g. refractory metal oxide, ZrO2, rare earth oxides or a thermal barrier system comprising at least one refractory oxide layer
-
- 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
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- 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
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C4/11—Oxides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Ceramic Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Laminated Bodies (AREA)
Description
Vynález řeší ochranné povlaky pro použití při ochraně tepelně namáhaných součástí, zejména spalovacích komor parních kotlů plazmovým nebo žárovým nástřikem.
Pro zajištění ochrany stěn spalovacích komor parních kotlů proti korozi jsou na kotlové trubky navařovány trny z nerezavějící oceli, na kterých je keramický omaz. Uvedený způsob ochrany je velice pracný a předpokládá obnovu keramického omazu v pravidelných cyklech.
Jedním ze známých způsobů ochrany ocelových součástí je podle čs. patentu Č. ' 130001 žárový nástřik vrstvy niklu v tloušťce 50 až 200 μια,' na kterou se musí nejpozději do 5 minut · nanést žárovým stříkáním· · vrstva hliníku ve stejné nebo větší · tloušťce, než · je · tloušťka niklo. vé · · vrstvy. Tento ·ochranný povlak · je· použitelný do teploty 1200 °C na vzduchu · a · v atmosféře obsahující sloučeniny síry.
Pro ochranu kotlových trubek je třeba uvažovat s povlaky, které jsou namáhány vyššími teplotami, než je teplota tavení strusky, která stéká po stěnách spalovacích komor. A ochranné povlaky musí plnit především úlohu tepelné clony · a tím snížit tepelné namáhání základního materiálu. Při výrobě ochranných povlaku, je však třeba použít · takovou technologii, · která dovolí nástřik základní · a · ·krycí vrstvy s · větším časovým odstupem než u známých způsobů.
Nevýhody · stávající ochrany stěn · spalovacích
V7 6 9 8 komor řeší dvouvrstvý ochranný povlak podle vynálezu, · který obsahuje v první vrstvě 70 až 90 hmotnostních procent niklu a 10 až 30 hmotnostních procent chrómu, v podstatě tím, že druhá vrstva obsahuje stopy až 10 hmotnostních procent kysličníku · vápenatého a · zbytek kysličníku zirkoničitého.
Použitím ochranných · plazmových a žárových nástřiků na tepelně namáhaný materiál, zejména spalovaných komor dojde· k· vytvoření vyhovující korozní ochrany na · povrchu základního materiálu, přičemž účinná korozní ochrana plazmovým nebo žárovým ' · nástřikem má v rozsahu pracovních teplot ve srovnání · , s · keramickým omazem několikanásobně · ..větší životnost. Použitím uvedené ochrany · materiálu spalovacích ko* mor parních kotlů dojde”k podstatnému snížení pracnosti při výrobě kotlů, úspoře materiálu trnů, úspoře keramického omazu a odstraní se odstavování parních kotlů z důvodu opravy omazu. Odstraněním výpadků kotlů dojde ke zvýšení výkonu energetických bloků. · Snížením tepelné setrvačnosti spalovacích komor je možné dosáhnout · rychlejšího najíždění kotlů na plný výkon.
Použitím dvouvrstvého ochranného povlaku dojde.· · v důsledku setrvání na pracovní teplotě k tepelně aktivovaným dějům, které · mají za následek zvýšení přilnavosti · podkladové vrstvy k základnímu materiálu. Výsledky · dlouhodobých zkoušek · prokázaly odolnost · dvouvrstvého ochranného povlaku . k cyklickému tepelnému . namáhám, ' zachovám celistvosti a požadovanou žáruvzdornost v atmosféře, 'obsahující sloučeniny síry za teplot převyšujících na povrchu ochranného povlaku 1500 °C.
Vynález je blíže objasněn na uvedených příkladech provedení.
Příklad 1
Příkladem použití ochrany tepelně namáhaných materiálů spalovacích komor parních kotlů je plazmový nástřik trubek povrchově zdrsněných tryskáním 0 76 mm, tloušťky stěny 5 mm, parního kotle. Podkladová vrstva v tloušťce 0,1 mm je tvořená nástřikem, který obsahuje
Claims (1)
- P R E D M É TDvouvrstvý ochranný povlak tepelně namáhaných součástí .obsahující v první vrstvě 70 až 90 hmotnostních procent niklu . a 10 až .30 hmotnostních .procent chrómu, vyznačený tím, že dru kromě niklu 18,30 hmotnostních procent chromu. Krycí vrstva v tloušťce 0,48 až ' 0,62 mm obsahuje kromě kysličníku zirkoničitého 4,80 hmotnostních procent kysličníku vápenatého.Příklad 2Obdobným příkladem je plazmový nástřik dopravníkových válečků průběžné žíhací pece. Na trubky povrchově zdrsněné tryskáním byla nastříkána podkladová vrstva v tloušťce 0,09 až 0,12 mm obsahující kromě niklu 14,2 hmotnostních procent . chr-omu. Krycí vrstva Obsahovala kromě kysličníku zirkoničitého. 4,20 hmotnostních procent kysličníku vápenatého a dosahovala tloušťky 0,53 až 0,71 mm.VYNÁLEZU há vrstva obsahuje stopy až 10 hmotnostních procent kysličníku vápenatého a zbytek kysličníku zirkoničitého.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS777659A CS197698B1 (en) | 1977-11-22 | 1977-11-22 | Double course protective coat of heat stressed components |
| DE19782850288 DE2850288A1 (de) | 1977-11-22 | 1978-11-20 | Zweischicht-schutzueberzug, der durch einen plasma- oder hitzespritzauftrag erzeugt wird, fuer waermebeanspruchte teile |
| SE7812003A SE7812003L (sv) | 1977-11-22 | 1978-11-21 | Skyddande tva-skiktsbeleggning for vermepakenda delar tillforda med en plasmaartad strale eller en hogtemperaturstrale |
| GB7845489A GB2009622B (en) | 1977-11-22 | 1978-11-21 | Protective coating for heat stressed parts |
| FR7833009A FR2409323A3 (fr) | 1977-11-22 | 1978-11-22 | Revetement protecteur en deux couches pour pieces soumises a la chaleur, produit par l'application par projection d'un plasma ou de matieres chaudes |
| IN1264/CAL/78A IN150434B (cs) | 1977-11-22 | 1978-11-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS777659A CS197698B1 (en) | 1977-11-22 | 1977-11-22 | Double course protective coat of heat stressed components |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CS197698B1 true CS197698B1 (en) | 1980-05-30 |
Family
ID=5426145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS777659A CS197698B1 (en) | 1977-11-22 | 1977-11-22 | Double course protective coat of heat stressed components |
Country Status (6)
| Country | Link |
|---|---|
| CS (1) | CS197698B1 (cs) |
| DE (1) | DE2850288A1 (cs) |
| FR (1) | FR2409323A3 (cs) |
| GB (1) | GB2009622B (cs) |
| IN (1) | IN150434B (cs) |
| SE (1) | SE7812003L (cs) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3242543C2 (de) * | 1982-11-18 | 1985-09-19 | Glyco-Metall-Werke Daelen & Loos Gmbh, 6200 Wiesbaden | Schichtwerkstoff mit einer auf einer metallischen Trägerschicht aufgebrachten Funktionsschicht aus metallischer Suspensionslegierung und Verfahren zu seiner Herstellung |
| DE3724995A1 (de) * | 1987-02-26 | 1988-09-08 | Radex Heraklith | Verfahren zur herstellung eines verbundkoerpers und verbundkoerper selbst |
| DE19721080C1 (de) * | 1997-05-20 | 1998-10-01 | Siemens Ag | Verfahren zum Überdecken eines Bauteiles mit einer korrosionshemmenden Fremdoxidschicht und mit einer solchen Fremdoxidschicht überdecktes Bauteil |
-
1977
- 1977-11-22 CS CS777659A patent/CS197698B1/cs unknown
-
1978
- 1978-11-20 DE DE19782850288 patent/DE2850288A1/de not_active Withdrawn
- 1978-11-21 GB GB7845489A patent/GB2009622B/en not_active Expired
- 1978-11-21 SE SE7812003A patent/SE7812003L/xx unknown
- 1978-11-22 FR FR7833009A patent/FR2409323A3/fr active Granted
- 1978-11-22 IN IN1264/CAL/78A patent/IN150434B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2850288A1 (de) | 1979-05-23 |
| GB2009622B (en) | 1982-04-07 |
| IN150434B (cs) | 1982-10-09 |
| FR2409323B3 (cs) | 1980-12-05 |
| FR2409323A3 (fr) | 1979-06-15 |
| SE7812003L (sv) | 1979-05-23 |
| GB2009622A (en) | 1979-06-20 |
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