GB2116454A - Coating sheets - Google Patents
Coating sheets Download PDFInfo
- Publication number
- GB2116454A GB2116454A GB08207390A GB8207390A GB2116454A GB 2116454 A GB2116454 A GB 2116454A GB 08207390 A GB08207390 A GB 08207390A GB 8207390 A GB8207390 A GB 8207390A GB 2116454 A GB2116454 A GB 2116454A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coating
- aluminium
- welding
- inert atmosphere
- adhesive
- 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.)
- Granted
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 32
- 239000011248 coating agent Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 32
- 238000003466 welding Methods 0.000 claims abstract description 18
- 239000000853 adhesive Substances 0.000 claims abstract description 14
- 230000001070 adhesive effect Effects 0.000 claims abstract description 14
- 239000004411 aluminium Substances 0.000 claims abstract description 13
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 5
- 238000000151 deposition Methods 0.000 claims abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000001301 oxygen Substances 0.000 claims abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 3
- 230000003019 stabilising effect Effects 0.000 claims abstract description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 230000003647 oxidation Effects 0.000 claims description 8
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 230000005855 radiation Effects 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000010894 electron beam technology Methods 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 238000011109 contamination Methods 0.000 claims description 2
- 238000005238 degreasing Methods 0.000 claims description 2
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 2
- 238000005530 etching Methods 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 230000000704 physical effect Effects 0.000 claims description 2
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- 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
- C23C2/26—After-treatment
-
- 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
- C23C2/26—After-treatment
- C23C2/261—After-treatment in a gas atmosphere, e.g. inert or reducing atmosphere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/20—Metallic substrate based on light metals
- B05D2202/25—Metallic substrate based on light metals based on Al
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0486—Operating the coating or treatment in a controlled atmosphere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/068—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using ionising radiations (gamma, X, electrons)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
- B05D3/102—Pretreatment of metallic substrates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Abstract
The process is provided for depositing on a sheet of aluminium or aluminium alloy a coating material comprising (1) treating the sheet to expose the virgin surface, (2) protecting the exposed surface from exposure to oxygen by means of an inert atmosphere, (3) applying coating material while so protected and (4) subjecting the coating to a stabilising process. Components so fabricated then subsequently be joined by the use of an adhesive or by welding or by both joining processes.
Description
SPECIFICATION
Process for coating sheets
This invention relates to a process for the coating of sheets of aluminium or of its alloys, and
to the use of sheet material so coated. It is
particularly concerned with providing such a
process to enable components fabricated from
sheets so coated to be bonded either by the use of
adhesive or welding or both to each other or to
another material.
In the vehicle body industry spot welding is
widely used in the fabrication of bodies from mild
steel sheet. The quest for lighter vehicle bodies
has led to the use of aluminium and its alloys.
However the use of spot welding with aluminium
raises problems including welding electrode contamination and reduced weld strength by
comparison with mild steel welds. The aircraft
industry has for many years made use of adhesive
bonding to fabricate load bearing structures of
aluminium and its alloys. It has been found that
the adhesive bond occurs between the relatively
weak oxide layers on the metal surface rather than
between the metal surfaces themselves. An
improvement in bonding has been achieved by
stripping of the naturally occuring oxide layer and
replacing it with an oxide layer which has been
generated with optimised physical properties for
subsequent bonding.
According to the present invention there is
provided a process for the coating of sheet
aluminium of aluminium alloy comprising the
steps of:
(1) passing the sheet material through a bath or
other treatment step to expose a surface of virgin
metal or alloy;
(2) protecting the exposed surface on formation from oxidation by means of an inert atmosphere;
(3) depositing on the exposed surface, while
protected by the inert atmosphere, a coating
material; and
(4) subjecting the coating material to a
stabilizing process following which the coating is
stabilized and bonded to the previously exposed
surface so as to protect the surface from
subsequent oxidation.
Preferably the process is carried out on a
continuous basis with the sheet in the form of a
continuous band.
Preferably the inert atmosphere is formed by an
inert gas such as nitrogen.
Preferably the stabilizing process comprises
curing or polymerising the coating material by
means of an electron beam or other radiation
source.
Subsequent to the coating process components
prepared from the sheet material can be
incorporated into structures, such as vehicle
bodies, by the use of adhesives or by a welding
process or by a combination of the two.
To protect people in the vicinity of the radiation shielding 23 while the electrom beam guns are in operation the shielding is provided with an angled passage 25 so that no straight path for the passage of radiation to the enclosure outlet 26 is available. A suitable angled path for the strip after curing is provided by rollers 27.
In considering the embodiment it should be born in mind that it is diagrammatic. Thus although only one degreasing and one etching tank is shown it may be necessary in practice to have more than one of each. In addition the coating stage is shown being carried out on both sides of the strip simultaneously. It may be necessary for each side to be coated and cured separately. The provision of an inert atmosphere with a suitably limited oxygen content can be dealt with by conventional means and is not detailed here.
Thereafter the sheet material can be subjected to conventional press or other fabrication processes to provide components which are capable of fabrication into structure, by the use of adhesive or by welding process or by using both adhesive and welding.
1. A process for the coating of sheet aluminium or aluminium alloy comprising the steps of:
(1) passing the sheet material through a bath or other treatment step to expose a surface of virgin metal or alloy;
(2) protecting the exposed surface on formation from oxidation by means of an inert atmosphere;
(3) depositing on the exposed surface, while protected by the inert atmosphere, a coating material; and
(4) subjecting the coating material to a stabilising process following which the coating is stabilised and bonded to the previously exposed surface so as to protect the surface from subsequent oxidation.
2. A process as claimed in claim 1 adapted for a continuous operation where the sheet material is in the form of a continuous band.
3. A process as claimed in any preceding claim wherein the inert atmosphere is made up of nitrogen gas.
4. A process as claimed in any preceding claim wherein the stabilizing process comprises curing or polymerising the coating material by means of an electron beam or other radiation source.
5. A process as herein before described with reference to, and as illustrated by, the accompanying drawing.
6. A process as claimed in any preceding claim comprising the further step of incorporating the sheet material, or a portion thereof, in to a fabrication by the application of an adhesive and/or welding process.
7. A component comprising sheet material prepared according to the process for any of the preceding claims 1 to 5.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (8)
1. A process for the coating of sheet aluminium or aluminium alloy comprising the steps of:
(1) passing the sheet material through a bath or other treatment step to expose a surface of virgin metal or alloy;
(2) protecting the exposed surface on formation from oxidation by means of an inert atmosphere;
(3) depositing on the exposed surface, while protected by the inert atmosphere, a coating material; and
(4) subjecting the coating material to a stabilising process following which the coating is stabilised and bonded to the previously exposed surface so as to protect the surface from subsequent oxidation.
2. A process as claimed in claim 1 adapted for a continuous operation where the sheet material is in the form of a continuous band.
3. A process as claimed in any preceding claim wherein the inert atmosphere is made up of nitrogen gas.
4. A process as claimed in any preceding claim wherein the stabilizing process comprises curing or polymerising the coating material by means of an electron beam or other radiation source.
5. A process as herein before described with reference to, and as illustrated by, the accompanying drawing.
6. A process as claimed in any preceding claim comprising the further step of incorporating the sheet material, or a portion thereof, in to a fabrication by the application of an adhesive and/or welding process.
7. A component comprising sheet material prepared according to the process for any of the preceding claims 1 to 5.
8. A fabrication comprising of an assembly in which a component as claimed in claim 7 is incorporated by means of an application of an adhesive and/or a welding process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08207390A GB2116454B (en) | 1982-03-13 | 1982-03-13 | Coating sheets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08207390A GB2116454B (en) | 1982-03-13 | 1982-03-13 | Coating sheets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2116454A true GB2116454A (en) | 1983-09-28 |
| GB2116454B GB2116454B (en) | 1985-08-29 |
Family
ID=10528991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08207390A Expired GB2116454B (en) | 1982-03-13 | 1982-03-13 | Coating sheets |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2116454B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0201992A3 (en) * | 1985-03-18 | 1987-12-02 | Illinois Tool Works Inc. | Method and apparatus for plating and coating and articles so produced |
| GB2248419A (en) * | 1990-10-05 | 1992-04-08 | Secr Defence | Method for improving adhesive bonding |
| DE4424979C1 (en) * | 1994-07-15 | 1996-01-25 | C D Waelzholz Poduktions Ges M | Process for making a ski edge |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB558926A (en) * | 1942-07-23 | 1944-01-27 | Ernest Windsor Bowen | Improvements in and relating to treating aluminium and aluminium base alloy surfaces in preparation for applying an adherent coating to them |
| GB666820A (en) * | 1948-09-16 | 1952-02-20 | Alais & Froges & Camarque Cie | Improvements relating to the coating or enamelling of copper articles |
| GB1271096A (en) * | 1969-04-14 | 1972-04-19 | Minnesota Mining & Mfg | Coating of solid substrates |
| GB1486979A (en) * | 1974-03-12 | 1977-09-28 | Nasa | Joining of aluminium containing components |
-
1982
- 1982-03-13 GB GB08207390A patent/GB2116454B/en not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB558926A (en) * | 1942-07-23 | 1944-01-27 | Ernest Windsor Bowen | Improvements in and relating to treating aluminium and aluminium base alloy surfaces in preparation for applying an adherent coating to them |
| GB666820A (en) * | 1948-09-16 | 1952-02-20 | Alais & Froges & Camarque Cie | Improvements relating to the coating or enamelling of copper articles |
| GB1271096A (en) * | 1969-04-14 | 1972-04-19 | Minnesota Mining & Mfg | Coating of solid substrates |
| GB1486979A (en) * | 1974-03-12 | 1977-09-28 | Nasa | Joining of aluminium containing components |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0201992A3 (en) * | 1985-03-18 | 1987-12-02 | Illinois Tool Works Inc. | Method and apparatus for plating and coating and articles so produced |
| GB2248419A (en) * | 1990-10-05 | 1992-04-08 | Secr Defence | Method for improving adhesive bonding |
| DE4424979C1 (en) * | 1994-07-15 | 1996-01-25 | C D Waelzholz Poduktions Ges M | Process for making a ski edge |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2116454B (en) | 1985-08-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19940313 |